Tandem Diabetes Care (TNDM) 10-Q1 Aug 242024 Q2 Quarterly reportFinancial data

Company Profile

Cover Page

Cover Page - shares	6 Months Ended
Cover Page - shares	Jun. 30, 2024	Jul. 29, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2024
Document Transition Report	false
Entity File Number	001-36189
Entity Registrant Name	Tandem Diabetes Care, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	20-4327508
Entity Address, Address Line One	12400 High Bluff Drive
Entity Address, City or Town	San Diego,
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	92130
City Area Code	858
Local Phone Number	366-6900
Title of 12(b) Security	Common Stock, par value $0.001 per share
Trading Symbol	TNDM
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		65,464,900
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q2
Entity Central Index Key	0001438133
Current Fiscal Year End Date	--12-31

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 47,697	$ 58,868
Short-term investments	404,718	409,044
Accounts receivable, net	98,117	105,555
Inventories	161,661	157,937
Prepaid and other current assets	21,195	16,585
Total current assets	733,388	747,989
Property and equipment, net	78,626	76,542
Operating lease right-of-use assets	88,243	87,791
Other long-term assets	37,246	40,336
Total assets	937,503	952,658
Current liabilities:
Accounts payable	47,776	49,586
Accrued expenses	13,225	12,726
Employee-related liabilities	42,871	43,430
Current portion of convertible senior notes, net	40,540	0
Operating lease liabilities	17,790	17,060
Deferred revenue	44,200	43,994
Other current liabilities	34,208	28,462
Total current liabilities	240,610	195,258
Convertible senior notes, net - long-term	307,392	285,035
Operating lease liabilities - long-term	111,392	113,572
Deferred revenue - long-term	11,736	13,331
Other long-term liabilities	32,498	31,830
Total liabilities	703,628	639,026
Commitments and contingencies (Note 13)	0	0
Stockholders’ equity:
Common stock, $0.001 par value; 200,000 shares authorized, 65,435 and 65,552 shares issued and outstanding at June 30, 2024 and December 31, 2023, respectively.	65	66
Additional paid-in capital	1,260,392	1,263,997
Accumulated other comprehensive income (loss)	(1,253)	1,369
Accumulated deficit	(1,025,329)	(951,800)
Total stockholders’ equity	233,875	313,632
Total liabilities and stockholders’ equity	$ 937,503	$ 952,658

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Jun. 30, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares issued (in shares)	65,435,000	65,552,000
Common stock, shares outstanding (in shares)	65,435,000	65,552,000

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Income Statement [Abstract]
Sales	$ 221,910	$ 195,917	$ 413,584	$ 365,300
Cost of sales	109,116	94,182	206,118	180,658
Gross profit	112,794	101,735	207,466	184,642
Operating expenses:
Selling, general and administrative	94,242	97,610	184,348	187,424
Research and development	49,326	42,933	95,570	85,093
Acquired in-process research and development expenses	0	0	0	78,750
Total operating expenses	143,568	140,543	279,918	351,267
Operating loss	(30,774)	(38,808)	(72,452)	(166,625)
Other income (expense), net:
Interest income and other, net	2,824	5,784	8,138	11,649
Interest expense	(1,793)	(1,605)	(3,690)	(3,239)
Loss on extinguishment of debt	0	0	(1,268)	0
Total other income (expense), net	1,031	4,179	3,180	8,410
Loss before income taxes	(29,743)	(34,629)	(69,272)	(158,215)
Income tax expense	1,071	1,146	4,257	1,433
Net loss	(30,814)	(35,775)	(73,529)	(159,648)
Other comprehensive income (loss):
Unrealized gain (loss) on short-term investments	(463)	(298)	(1,759)	1,451
Foreign currency translation gains (losses)	145	(802)	(863)	(827)
Comprehensive loss	$ (31,132)	$ (36,875)	$ (76,151)	$ (159,024)
Net loss per share - basic (in dollars per share)	$ (0.47)	$ (0.55)	$ (1.13)	$ (2.47)
Net loss per share - diluted (in dollars per share)	$ (0.47)	$ (0.55)	$ (1.13)	$ (2.47)
Weighted average shares used to compute basic net loss per share (in shares)	64,994	64,830	65,160	64,690
Weighted average shares used to compute diluted net loss per share (in shares)	64,994	64,830	65,160	64,690

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2022		64,513
Beginning balance at Dec. 31, 2022	$ 439,947	$ 65	$ 1,170,888	$ (1,817)	$ (729,189)
Increase (Decrease) in Stockholders' Equity
Exercise of stock options (in shares)		63
Exercise of stock options	1,162		1,162
Vesting of restricted stock units, net of shares withheld for taxes (in shares)		237
Vesting of restricted stock units, net of shares withheld for taxes	(4,561)		(4,561)
Issuance of common stock under Employee Stock Purchase Plan (in shares)		249
Issuance of common stock under Employee Stock Purchase Plan	6,804		6,804
Exercise of common stock warrants (in shares)		0
Exercise of common stock warrants	0		0
Stock-based compensation expense	44,906		44,906
Unrealized gain (loss) on short-term investments	1,451			1,451
Foreign currency translation gains (loss)	(827)			(827)
Net loss	(159,648)				(159,648)
Ending balance (in shares) at Jun. 30, 2023		65,062
Ending Balance at Jun. 30, 2023	329,234	$ 65	1,219,199	(1,193)	(888,837)
Beginning balance (in shares) at Mar. 31, 2023		64,609
Beginning balance at Mar. 31, 2023	338,753	$ 65	1,191,843	(93)	(853,062)
Increase (Decrease) in Stockholders' Equity
Exercise of stock options (in shares)		18
Exercise of stock options	305		305
Vesting of restricted stock units, net of shares withheld for taxes (in shares)		186
Vesting of restricted stock units, net of shares withheld for taxes	(3,163)		(3,163)
Issuance of common stock under Employee Stock Purchase Plan (in shares)		249
Issuance of common stock under Employee Stock Purchase Plan	6,804		6,804
Stock-based compensation expense	23,410		23,410
Unrealized gain (loss) on short-term investments	(298)			(298)
Foreign currency translation gains (loss)	(802)			(802)
Net loss	(35,775)				(35,775)
Ending balance (in shares) at Jun. 30, 2023		65,062
Ending Balance at Jun. 30, 2023	329,234	$ 65	1,219,199	(1,193)	(888,837)
Beginning balance (in shares) at Dec. 31, 2023		65,552
Beginning balance at Dec. 31, 2023	313,632	$ 66	1,263,997	1,369	(951,800)
Increase (Decrease) in Stockholders' Equity
Stock repurchase and retirement of shares (in shares)		(1,107)
Stock repurchase and retirement of shares	(30,000)	$ (1)	(29,999)
Exercise of stock options (in shares)		70
Exercise of stock options	1,397		1,397
Vesting of restricted stock units, net of shares withheld for taxes (in shares)		518
Vesting of restricted stock units, net of shares withheld for taxes	(12,197)		(12,197)
Issuance of common stock under Employee Stock Purchase Plan (in shares)		402
Issuance of common stock under Employee Stock Purchase Plan	6,286		6,286
Stock-based compensation expense	46,537		46,537
Purchase of capped call options related to convertible notes due 2029	(15,813)		(15,813)
Unwind of capped call options related to convertible notes due 2025	184		184
Unrealized gain (loss) on short-term investments	(1,759)			(1,759)
Foreign currency translation gains (loss)	(863)			(863)
Net loss	(73,529)				(73,529)
Ending balance (in shares) at Jun. 30, 2024		65,435
Ending Balance at Jun. 30, 2024	233,875	$ 65	1,260,392	(1,253)	(1,025,329)
Beginning balance (in shares) at Mar. 31, 2024		64,563
Beginning balance at Mar. 31, 2024	243,064	$ 65	1,238,449	(935)	(994,515)
Increase (Decrease) in Stockholders' Equity
Exercise of stock options (in shares)		55
Exercise of stock options	1,149		1,149
Vesting of restricted stock units, net of shares withheld for taxes (in shares)		415
Vesting of restricted stock units, net of shares withheld for taxes	(10,438)		(10,438)
Issuance of common stock under Employee Stock Purchase Plan (in shares)		402
Issuance of common stock under Employee Stock Purchase Plan	6,286		6,286
Stock-based compensation expense	24,946		24,946
Unrealized gain (loss) on short-term investments	(463)			(463)
Foreign currency translation gains (loss)	145			145
Net loss	(30,814)				(30,814)
Ending balance (in shares) at Jun. 30, 2024		65,435
Ending Balance at Jun. 30, 2024	$ 233,875	$ 65	$ 1,260,392	$ (1,253)	$ (1,025,329)

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Operating Activities
Net loss	$ (73,529)	$ (159,648)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization expense	8,151	7,661
Amortization of debt issuance costs	1,085	1,009
Provision for expected credit losses	3,723	2,758
Operating lease termination and other impairment charges	2,000	14,099
Accretion of discount or premium on short-term investments	348	1,755
Stock-based compensation expense	46,936	44,594
Loss on extinguishment of debt	1,268	0
Acquired in-process research and development expenses	0	78,750
Other	335	(280)
Changes in operating assets and liabilities:
Accounts receivable, net	2,862	13,553
Inventories	(5,157)	(35,945)
Prepaid and other current assets	(4,782)	(3,147)
Other long-term assets	93	(1,659)
Accounts payable and accrued expenses	241	5,557
Employee-related liabilities	(462)	(2,711)
Deferred revenue	(1,261)	2,946
Operating leases and other current liabilities	3,967	5,023
Other long-term liabilities	911	1,036
Net cash used in operating activities	(13,271)	(24,649)
Investing Activities
Purchases of short-term investments	(177,724)	(235,525)
Proceeds from maturities and redemptions of short-term investments	180,051	303,110
Purchases of property and equipment	(10,923)	(16,205)
Acquisitions, including in-process research and development, net of cash acquired	0	(69,496)
Purchases of intangible assets and strategic investments	0	(2,515)
Net cash used in investing activities	(8,596)	(20,631)
Financing Activities
Proceeds from issuance of convertible senior notes due 2029, net of $9,400 debt issuance costs	306,850	0
Repurchase of $246,740 principal amount of convertible senior notes due 2025	(246,123)	0
Payment for capped call transactions related to convertible senior notes due 2029	(15,813)	0
Repurchase and retirement of common stock	(30,000)
Proceeds from issuance of common stock under Company stock plans, net of cash used to settle withholding taxes on vested restricted stock	(4,513)	3,407
Other financing activities	183	0
Net cash provided by (used in) financing activities	10,584	3,407
Effect of foreign exchange rate changes on cash	112	107
Net increase (decrease) in cash and cash equivalents	(11,171)	(41,766)
Cash and cash equivalents at beginning of period	58,868	172,517
Cash and cash equivalents at end of period	47,697	130,751
Supplemental disclosures of cash flow information
Income taxes paid	1,183	1,771
Supplemental schedule of non-cash investing and financing activities
Operating lease right-of-use assets obtained in exchange for operating lease obligations	3,783	0
Purchases of property and equipment included in accounts payable	$ 1,505	$ 3,027

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (Parenthetical) $ in Thousands	Jun. 30, 2024 USD ($)
Statement of Cash Flows [Abstract]
Unamortized debt issuance costs	$ 9,400
Repurchased face amount	$ 246,740

Organization and Basis of Prese

Organization and Basis of Presentation	6 Months Ended
Organization and Basis of Presentation	Jun. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Basis of Presentation	Organization and Basis of Presentation The Company Tandem Diabetes Care, Inc. is a medical device company focused on the design, development and commercialization of technology solutions for people living with diabetes. Tandem Diabetes Care, Inc. is incorporated in the state of Delaware. Unless the context requires otherwise, the terms the “Company” or “Tandem” refer to Tandem Diabetes Care, Inc., together with its wholly-owned subsidiaries. The Company manufactures, sells, and supports insulin pump products that are designed to address the evolving needs and preferences of differentiated segments of the insulin-dependent diabetes market. The Company recently expanded its portfolio, which now includes both the t:slim X2 Insulin Delivery System (t:slim X2) and the Tandem Mobi insulin pumps. Both pumps have an advanced algorithm for managing insulin delivery, using information received from integrated continuous glucose monitoring (CGM) sensors. The software on the insulin pump products may be updated remotely by the individual users as new advancements become available and are compatible with other complementary digital health offerings, such as the mobile application and cloud-based diabetes management applications. The Company’s insulin pump products are generally considered durable medical equipment and have an expected lifespan of at least four years. In addition to insulin pumps, the Company sells single-use products that are used together with the pumps and are replaced every few days, including cartridges for storing and delivering insulin, and infusion sets that connect the insulin pump to a user’s body. Basis of Presentation and Principles of Consolidation The Company has prepared the accompanying unaudited condensed consolidated financial statements in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) for interim financial information and pursuant to the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and disclosures required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments which are of a normal and recurring nature and considered necessary for a fair presentation of the financial information contained herein, have been included. Interim financial results are not necessarily indicative of results anticipated for the full year or any other period(s). These unaudited condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023 (Annual Report), from which the balance sheet information herein was derived. The condensed consolidated financial statements include the accounts of Tandem Diabetes Care, Inc. and its wholly-owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation. The functional currency of the Company’s foreign subsidiaries is their respective local currency. The Company translates the financial statements of its foreign subsidiaries into U.S. dollars using period-end exchange rates for assets and liabilities and average exchange rates for each period for revenue, costs and expenses. Translation related adjustments are included in other comprehensive income (loss) in the condensed consolidated statements of operations, and in accumulated other comprehensive income (loss) in the stockholders’ equity section of the Company’s condensed consolidated balance sheets. Foreign exchange gains or losses resulting from balances denominated in a currency other than the functional currency are recognized in interest income and other, net in the Company’s condensed consolidated statements of operations.

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
Summary of Significant Accounting Policies	Jun. 30, 2024
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies There have been no material changes to the Company’s significant accounting policies during the six months ended June 30, 2024, as compared to those disclosed in the Company’s 2023 Annual Report. Use of Estimates The preparation of the condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses and the disclosure of contingent assets and liabilities in the Company’s condensed consolidated financial statements and accompanying notes as of the date of the condensed consolidated financial statements. Some of those judgments can be subjective and complex, and therefore, actual results could differ materially from those estimates under different assumptions or conditions. Accounts Receivable The Company grants credit to various customers in the ordinary course of business and is paid directly by customers who use its products, distributors and third-party insurance payors. The Company maintains an allowance for its current estimate of expected credit losses. Provisions for expected credit losses are estimated based on historical experience, assessment of specific customer-related risks, review of outstanding invoices, forecasts about the future, and various other assumptions and estimates that are believed to be reasonable under the circumstances, including changes to credit risks as a result of recessionary concerns, changes in discretionary spending, increased interest rates, and other macroeconomic factors. Uncollectible accounts are written off against the allowance after appropriate collection efforts have been exhausted and when it is deemed that a balance is uncollectible. Operating Lease Right-of-Use Assets and Liabilities Operating lease right-of-use assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent its obligation to make lease payments arising from the lease. Operating lease right-of-use assets and liabilities are recognized when the Company takes possession of the leased property (Commencement Date) based on the present value of lease payments over the lease term. For lease agreements that contain lease and non-lease components, the Company accounts for both of those components as a single lease component. Rent expense on noncancelable leases containing known future scheduled rent increases is recorded on a straight-line basis over the term of the respective leases beginning on the Commencement Date. The difference between rent expense and rent paid is accounted for as a component of operating lease right-of-use assets on the Company’s condensed consolidated balance sheets. Landlord improvement allowances and other similar lease incentives are recorded as a reduction of the right-of-use leased assets, and are amortized on a straight-line basis as a reduction to operating lease costs. Intangible Assets Subject to Amortization Finite-lived intangible assets are recorded at cost, net of accumulated amortization and, if applicable, impairment charges. Amortization of finite-lived intangible assets is recognized over their estimated useful lives on a straight-line basis. The Company did not recognize any intangible asset impairment losses during the three and six months ended June 30, 2024 and 2023. Strategic Investments The Company held equity investments totaling $30.4 million and $10.1 million in private companies at June 30, 2024 and December 31, 2023, respectively. The investments were included as a component of other long-term assets on the condensed consolidated balance sheets at June 30, 2024 and December 31, 2023. The investments are carried at cost minus impairment, if any, adjusted for changes in observable prices. The Company monitors these investments to evaluate whether any increase or decline in its value has occurred, based on the implied value of recent company financings, public market prices of comparable companies and general market conditions. During the three and six months ended June 30, 2024, the Company recorded an impairment charge of $2.0 million related to one of its investments in a private company. The Company did not record any impairment charges related to its strategic investments in the three and six months ended June 30, 2023. Approximately $22.2 million of the total strategic investments balance was previously held in the form of subordinated convertible notes of one private investee company. The subordinated notes were converted into equity of the private company at final maturity, which occurred in June 2024. As a result of the note conversion, the Company received shares of the private investee company. As of June 30, 2024, and December 31, 2023, each of the Company’s equity investments in private companies represented less than 15% of the outstanding equity of the respective private company. Revenue Recognition Revenue is generated primarily from sales of insulin pumps, single-use insulin cartridges and infusion sets to individual customers with third-party insurance coverage and through a network of distributors that resell the products to insulin-dependent diabetes customers. The Company recognizes revenue when it transfers control of the promised goods or services to customers in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services, net of estimated rebates and returns. Revenue Recognition for Arrangements with Multiple Performance Obligations The Company considers the individual deliverables in its product offerings to be separate performance obligations. The transaction price is determined based on the consideration expected to be received, based either on the stated value in contractual arrangements or the estimated cash to be collected in non-contracted arrangements. The Company allocates the consideration to the individual performance obligations and recognizes the consideration based on when the performance obligation is satisfied, considering whether or not this occurs at a point in time or over time. Generally, insulin pumps, cartridges, infusion sets, and accessories are deemed performance obligations that are satisfied at a point in time when the customer obtains control of the promised good, which typically is upon shipment for our distributor arrangements and upon receipt for sales directly to individual customers. Complementary products, such as the Company’s data management and software update platforms, are considered distinct performance obligations that are satisfied over time, as access and support for these products is provided throughout the typical four-year warranty period of the insulin pumps. Accordingly, revenue related to the complementary products is deferred and recognized over a four-year period. Where there is no standalone value for the complementary product, the Company determines its value by applying the expected cost plus a margin approach and then allocates the residual to the insulin pumps. Revenue Recognition for Tandem Choice Program In September 2022, the Company launched a new technology access program referred to as Tandem Choice, that provides eligible, in-warranty t:slim X2 customers in the United States with the flexibility to obtain the newest hardware platform, Tandem Mobi, when commercially available. Participating customers have the right to purchase the alternative Tandem pump for a fee, referred to as a choice right. The program was determined to create a material right for which a portion of each t:slim X2 pump transaction price was allocated and deferred. The Company determined that the ability for a customer to upgrade to a new technology represents a material right because the pricing inherent in such option provides the customer with a discount that is incremental to the range of discounts that would otherwise be granted for the related goods and services to comparable customers. The standalone selling price for the choice right was estimated based on the adjusted market assessment approach and contemplated the likelihood that the respective option will be exercised. The Company began selling Tandem Mobi insulin pumps in the first quarter of 2024 and eligibility for the Tandem Choice program ended in February 2024. Consequently, the Company ceased to allocate and defer a portion of the transaction price for the material right for pumps sold after that date. Eligible customers who purchased a t:slim X2 insulin pump during the program period will have until December 31, 2024 to exercise the option to switch to the Tandem Mobi for a stated fee. The Company will recognize the deferred amount of sales at the earlier of when the obligations under the Tandem Choice program are satisfied or when the program expires. If a customer elects to participate in the program, the Company will recognize upgrade fees received, and the associated cost of goods sold at the time of fulfilling the obligation. For the six months ended June 30, 2024, the Company deferred $1.1 million of pump sales that qualified for Tandem Choice, and recognized incremental sales of $0.2 million from individual Tandem Choice fulfillments. At June 30, 2024 and December 31, 2023, current deferred revenue balance was $31.0 million and $30.6 million, respectively, related to the Tandem Choice program. Sales Rebates The Company is subject to certain rebates on pricing programs with managed care organizations, such as governmental and third-party commercial payors. The Company estimates provisions for rebates based on contractual arrangements, estimates of products sold subject to rebate, known events or trends and channel inventory data. Estimated sales rebates included in other long-term liabilities have an estimated payment due date beyond twelve months from the balance sheet date. Accordingly, actual rebates paid may differ from estimated amounts recorded in the accompanying condensed consolidated financial statements. As of June 30, 2024 and December 31, 2023, total estimated sales rebates were included in the following condensed consolidated balance sheet accounts (in thousands): June 30, 2024 December 31, 2023 Other current liabilities $ 490 $ 505 Other long-term liabilities 8,494 8,042 Total sales rebate $ 8,984 $ 8,547 Warranty Reserve The Company generally provides a four-year warranty on its insulin pumps to end-user customers and may replace any pumps that do not function as intended in accordance with the product specifications within the warranty period. Additionally, the Company offers a six-month warranty on single-use insulin cartridges and infusion sets. Estimated warranty costs are recorded at the time of shipment, and the Company reevaluates the estimate of the warranty reserve obligation at each reporting period. Warranty costs are estimated primarily based on the current expected product replacement cost and expected replacement rates using historical experience. Insulin pumps returned to the Company may be refurbished and redeployed. Experience has shown that initial data for any given pump version or pump platform may be insufficient; therefore, the Company’s process relies on long-term historical averages of existing platforms until sufficient data are available. As actual experience becomes available, the Company uses the data to update the historical averages. The Company may make further adjustments to the warranty reserve when deemed appropriate, giving additional consideration to revised future expectations of performance based on enhanced hardware components, or new features and capabilities that may become available through Tandem Device Updater. Warranty expense is recorded as a component of cost of sales in the condensed consolidated statements of operations. The following table provides a reconciliation of the changes in product warranty liabilities for the three and six months ended June 30, 2024 and 2023 (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Balance at beginning of the period $ 37,638 $ 37,152 $ 37,173 $ 36,537 Provision for warranties issued during the period 9,581 8,915 19,990 17,288 Settlements made during the period (9,062) (7,385) (18,099) (15,068) Increases (decreases) in warranty estimates (801) 235 (1,708) 160 Balance at end of the period $ 37,356 $ 38,917 $ 37,356 $ 38,917 As of June 30, 2024 and December 31, 2023, total product warranty reserves were included in the following condensed consolidated balance sheet accounts (in thousands): June 30, 2024 December 31, 2023 Other current liabilities $ 18,155 $ 18,135 Other long-term liabilities 19,201 19,038 Total warranty reserve $ 37,356 $ 37,173 Stock-Based Compensation Stock-based compensation cost is measured at the grant date based on the estimated fair value of the award, and the portion that is ultimately expected to vest is recognized as compensation expense over the requisite service period on a straight-line basis. The Company estimates the fair value of stock options issued under the Company’s stock incentive plans, and the fair value of the employees’ purchase rights under the Company’s Employee Stock Purchase Plan (ESPP) using the Black-Scholes option pricing model on the date of grant. The Black-Scholes option pricing model requires the use of assumptions about a number of variables, including stock price volatility, expected term, dividend yield and risk-free interest rate (see Note 8, “Stockholders’ Equity”). The fair value of restricted stock unit (RSU) awards issued under the Company’s stock incentive plans that vest solely based on service, is estimated based on the fair market value of the underlying stock on the date of grant. The fair value of RSU awards that vest based upon the Company’s actual performance relative to predefined performance metrics and the awardee’s continuing service through the measurement date is generally estimated based on the fair market value of the underlying stock on the date of grant and the probability that the specified performance criteria will be met. At each reporting period, the Company reassesses the probability of the achievement of such performance metrics. Any expense change resulting from an adjustment in the estimated shares to be released is recorded in the period of adjustment. Net Income (Loss) Per Share Basic net income (loss) per share is calculated by dividing the net income or loss by the weighted average number of common shares outstanding for the period, without consideration for common stock equivalents. Diluted net income (loss) per share reflects the potential dilution that would occur if securities exercisable for or convertible into common stock were exercised for or converted into common stock. Dilutive common share equivalents are comprised of stock options and unvested RSUs outstanding under the Company’s stock incentive plans, potential awards to be granted pursuant to the ESPP, and common stock warrants, each calculated using the treasury stock method, and shares issuable upon conversion of the convertible senior notes calculated using the if-converted method. For the three and six months ended June 30, 2024 and 2023, there was no difference in the weighted average number of shares used to calculate basic and diluted net loss per share due to the Company’s net loss position for each of the periods presented. Potentially dilutive securities outstanding and not included in the calculation of diluted net loss per share (because inclusion would be anti-dilutive) are as follows (in thousands, in common stock equivalent shares): Three Months Ended Six Months Ended June 30, 2024 2023 2024 2023 Options to purchase common stock 804 138 129 138 Unvested restricted stock units 3,322 2,032 2,865 1,677 Warrants to purchase common stock 194 194 194 194 Awards granted under the ESPP 59 32 29 16 Convertible senior notes (if-converted) 9,513 2,554 6,877 2,554 13,892 4,950 10,094 4,579

Short-Term Investments

Short-Term Investments	6 Months Ended
Short-Term Investments	Jun. 30, 2024
Investments, Debt and Equity Securities [Abstract]
Short-Term Investments	Short-Term Investments The Company invests in marketable securities primarily consisting of debt instruments of the United States Government, United States Government-sponsored enterprises, and financial institutions and corporations with strong credit ratings. The following represents a summary of the estimated fair value of short-term investments at June 30, 2024 and December 31, 2023 (in thousands): At June 30, 2024 Amortized Gross Unrealized Gross Unrealized Estimated Available-for-sale securities: United States Government-sponsored enterprises $ 176,311 $ 37 $ (754) $ 175,594 United States Treasury securities 90,505 14 (189) 90,330 Commercial paper 45,520 1 (52) 45,469 Corporate debt securities 93,392 70 (137) 93,325 Total $ 405,728 $ 122 $ (1,132) $ 404,718 At December 31, 2023 Amortized Gross Unrealized Gross Unrealized Estimated Available-for-sale securities: United States Government-sponsored enterprises $ 181,851 $ 518 $ (215) $ 182,154 United States Treasury securities 114,714 318 (28) 115,004 Commercial paper 72,505 33 (27) 72,511 Corporate debt securities 39,225 156 (6) 39,375 Total $ 408,295 $ 1,025 $ (276) $ 409,044 The contractual maturities of available-for-sale debt securities as of June 30, 2024, were as follows (in thousands): Years to Maturity At June 30, 2024 Within One Year One to Two Years Two to Three Years Estimated Fair Value United States Government-sponsored enterprises $ 66,707 $ 30,914 $ 77,973 $ 175,594 United States Treasury securities 54,404 34,941 985 90,330 Commercial paper 45,469 — — 45,469 Corporate debt securities 53,092 40,233 — 93,325 Total $ 219,672 $ 106,088 $ 78,958 $ 404,718 The Company has classified all marketable securities, regardless of maturity, as short-term investments based upon the Company’s ability and intent to use any of those marketable securities to satisfy the Company’s liquidity requirements. The Company reviews the portfolio of available-for-sale debt securities quarterly to determine if any investment is impaired due to changes in credit risk or other potential valuation concerns. Unrealized losses on available-for-sale debt securities at June 30, 2024 were primarily due to an increase in market interest rates after certain debt securities were purchased. The Company does not intend to sell the available-for-sale debt securities that are in an unrealized loss position, and it is not more likely than not that the Company will be required to sell these debt securities before recovery of their amortized cost bases, which may be at maturity. Based on the credit quality of the available-for-sale debt securities in an unrealized loss position, and the Company’s estimates of future cash flows to be collected from those securities, the Company believes the unrealized losses are not credit losses. Accordingly, the Company did not record an allowance for credit losses related to its available-for-sale debt securities at June 30, 2024 and December 31, 2023.

Composition of Certain Financia

Composition of Certain Financial Statement Items	6 Months Ended
Composition of Certain Financial Statement Items	Jun. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Composition of Certain Financial Statement Items	Composition of Certain Financial Statement Items Accounts Receivable Accounts receivable, net consisted of the following at June 30, 2024 and December 31, 2023 (in thousands): June 30, December 31, 2024 2023 Accounts receivable $ 103,342 $ 110,453 Less: allowance for credit losses (5,225) (4,898) Accounts receivable, net $ 98,117 $ 105,555 Allowance for Credit Losses The following table provides a reconciliation of the changes in the allowance for estimated accounts receivable credit losses for the three and six months ended June 30, 2024 and 2023 (in thousands): Three Months Ended Six Months Ended June 30, 2024 2023 2024 2023 Balance at beginning of the period $ 4,923 $ 4,467 $ 4,898 $ 4,327 Provision for expected credit losses 1,525 1,372 3,723 2,758 Write-offs and adjustments, net of recoveries (1,223) (997) (3,396) (2,243) Balance at end of the period $ 5,225 $ 4,842 $ 5,225 $ 4,842 Inventories Inventories consisted of the following at June 30, 2024 and December 31, 2023 (in thousands): June 30, December 31, 2024 2023 Raw materials $ 45,457 $ 42,783 Work-in-process 28,455 44,026 Finished goods 87,749 71,128 Total inventories $ 161,661 $ 157,937

Fair Value Measurements

Fair Value Measurements	6 Months Ended
Fair Value Measurements	Jun. 30, 2024
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The following table presents information about the Company’s financial assets and liabilities measured at fair value on a recurring basis as of June 30, 2024 and December 31, 2023, and indicates the fair value hierarchy of the valuation techniques used by the Company to determine such fair value (in thousands): Fair Value Measurements at June 30, 2024 Total Level 1 Level 2 Level 3 Assets Cash equivalents (1) $ 34,513 $ 34,513 $ — $ — United States Government-sponsored enterprises 175,594 — 175,594 — United States Treasury securities 90,330 90,330 — — Commercial paper 45,469 — 45,469 — Corporate debt securities 93,325 — 93,325 — Total assets $ 439,231 $ 124,843 $ 314,388 $ — Fair Value Measurements at December 31, 2023 Total Level 1 Level 2 Level 3 Assets Cash equivalents (1) $ 48,033 $ 48,033 $ — $ — United States Government-sponsored enterprises 182,154 — 182,154 — United States Treasury securities 115,004 115,004 — — Commercial paper 72,511 — 72,511 — Corporate debt securities 39,375 — 39,375 — Supranational bonds — — — — Total assets $ 457,077 $ 163,037 $ 294,040 $ — (1) Generally, cash equivalents include money market funds and investments with a maturity of three months or less from the date of purchase. The Company’s Level 1 financial instruments, which are in active markets, are valued using unadjusted quoted market prices for identical instruments. The Company’s Level 2 financial instruments are valued using market prices on less active markets with observable valuation inputs such as interest rates and yield curves. The Company obtains the fair value of Level 2 financial instruments from quoted market prices, calculated prices or quotes from third-party pricing services. The Company validates these prices through independent valuation testing and review of portfolio valuations provided by the Company’s investment managers. There were no transfers into or out of Level 3 assets during the three months ended June 30, 2024 and 2023, respectively. Fair Value of Financial Instruments The carrying amounts of cash and cash equivalents, accounts receivable, accounts payable, accrued expenses, and employee-related liabilities are reasonable estimates of their fair values because of the short-term nature of these assets and liabilities. Short-term investments are carried at fair value. The Company’s convertible senior notes are carried at amortized cost on the condensed consolidated balance sheets (see Note 7, “Debt”). The Company estimated the fair value of its convertible senior notes based on Level 2 quoted market prices as follows (in thousands): Fair Value Measurements at June 30, 2024 December 31, 2023 Convertible Senior Notes due 2025 $ 39,130 $ 271,688 Convertible Senior Notes due 2029 438,701 * Total fair value of outstanding convertible senior notes $ 477,831 $ 271,688 * Not applicable as no notes were outstanding at this date.

Leases

Leases	6 Months Ended
Leases	Jun. 30, 2024
Leases [Abstract]
Leases	Leases The Company's leases consist of operating leases for general office space, research and development, manufacturing and warehouse facilities, and equipment. These noncancellable operating leases have initial lease terms from two years to thirteen years. Certain leases include an option to renew, with renewal terms that can extend the lease term for additional periods at the Company’s sole discretion. The Company includes the renewal option period in the lease term for those leases reasonably expected to be extended at the time of lease commencement. Supplemental Lease Disclosure Information The Company’s lease costs recorded in the condensed consolidated statements of operations were as follows (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Operating lease cost $ 3,564 $ 4,299 $ 7,081 $ 8,774 Short-term lease cost 21 124 43 220 Loss on lease termination and right-of-use asset impairment charges — 11,224 — 11,224 Total lease cost $ 3,585 $ 15,647 $ 7,124 $ 20,218 Maturities of operating lease liabilities at June 30, 2024 were as follows (in thousands): Years Ending December 31, 2024 $ 8,874 2025 18,046 2026 17,946 2027 18,229 2028 14,714 Thereafter 90,004 Total undiscounted lease payments 167,813 Less: amount representing interest (38,631) Present value of operating lease liabilities 129,182 Less: current portion of operating lease liabilities (17,790) Operating lease liabilities - long-term $ 111,392 The weighted-average remaining lease term and weighted-average discount rate for operating leases were as follows: June 30, 2024 December 31, 2023 Weighted-average remaining lease term (in years) 9.9 10.2 Weighted-average discount rate used to determine operating lease liabilities 5.3 % 5.4 % Cash amounts paid included in the measurement of lease liabilities, representing operating cash flows, were $4.7 million and $4.4 million for the six months ended June 30, 2024 and 2023, respectively.

Debt

Debt	6 Months Ended
Debt	Jun. 30, 2024
Debt Disclosure [Abstract]
Debt	Debt Convertible Senior Notes Due 2029 On March 8, 2024, the Company completed an offering of $316.3 million aggregate principal amount of 1.50% Convertible Senior Notes due 2029 (the 2029 Notes). The proceeds from the issuance of the 2029 Notes were $306.8 million, net of debt issuance costs. The Company used approximately $246.1 million of the net proceeds to repurchase approximately $246.7 million in aggregate principal amount of its Convertible Senior Notes Due 2025 (the 2025 Notes) concurrently with the pricing of the 2029 Notes in privately negotiated transactions. Concurrently, the Company also paid $1.3 million of accrued interest due at time of the note repurchase. As a result of the repurchase, the Company recognized a $1.3 million loss on extinguishment of debt in the condensed consolidated statement of operations for the six months ended June 30, 2024. The loss on extinguishment of debt included the unamortized debt issuance costs related to the portion of the 2025 Notes repurchased. The Company used $30.0 million of the net proceeds to repurchase shares of the Company’s common stock from certain purchasers of the 2029 Notes at a purchase price equal to the last reported sale price per share of the Company’s common stock on March 5, 2024, which was $27.105 per share. In addition, the Company used $15.8 million of the net proceeds to pay the cost of the capped call transactions (2029 Capped Call Transactions) discussed below. The 2029 Notes are the Company’s senior unsecured obligations. Interest is payable in cash semi-annually in arrears on March 15 and September 15 of each year beginning on September 15, 2024, at a rate of 1.50% per year. The 2029 Notes mature on March 15, 2029 unless repurchased, redeemed, or converted in accordance with their terms prior to the maturity date. The initial conversion rate for the 2029 Notes is 28.9361 shares of common stock per $1,000 principal amount of the 2029 Notes, which is equivalent to an initial conversion price of approximately $34.56 per share of the Company’s common stock (2029 Notes Conversion Price). The conversion rate is subject to customary adjustments for certain events as described in the indenture governing the 2029 Notes. The Company may not redeem the 2029 Notes prior to March 22, 2027. The Company has the option to redeem for cash all or any portion of the 2029 Notes on or after March 22, 2027 if the last reported sale price of the Company’s common stock has been at least 130% of the 2029 Notes Conversion Price then in effect for at least 20 trading days (whether or not consecutive), including the trading day immediately preceding the date on which the Company provides notice of redemption, during any 30 consecutive trading day period, at a redemption price equal to 100% of the principal amount of the 2029 Notes to be redeemed, plus accrued and unpaid interest. No sinking fund is provided for the 2029 Notes. Holders of the 2029 Notes may convert all or a portion of their 2029 Notes at their option prior to December 15, 2028, in multiples of $1,000 principal amounts, only under the following circumstances: • during any calendar quarter commencing after the quarter ending on June 30, 2024 (and only during such calendar quarter), if the last reported sale price of the Company’s common stock, for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the 2029 Notes Conversion Price on each applicable trading day; • during the five business day period after any ten consecutive trading day period (the measurement period) in which the trading price per $1,000 principal amount of the 2029 Notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of the Company’s common stock and the applicable conversion rate of the 2029 Notes on such trading day; • if the Company calls such 2029 Notes for redemption, at any time before the close of business on the scheduled trading day immediately preceding the redemption date, but only with respect to the 2029 Notes called (or deemed called) for redemption; or • on the occurrence of specified corporate events. On or after December 15, 2028, until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert their 2029 Notes, in integral multiples of $1,000 principal amount, at any time, regardless of the foregoing circumstances. Upon conversion, the Company will pay or deliver, as the case may be, cash, shares of common stock or a combination of cash and shares of common stock, at the Company’s election, in the manner and subject to the terms and conditions provided in the indenture governing the 2029 Notes. During the three months ended June 30, 2024, the conversion feature of the 2029 Notes was triggered and therefore the 2029 Notes are currently convertible, in whole or in part, at the option of the holders from July 1, 2024 through September 30, 2024. Whether the 2029 Notes will be convertible following the stated period will depend on the continued satisfaction of this condition or another conversion condition. The Company has not received any conversion notices through the issuance date of its condensed consolidated financial statements. The Company may elect to settle conversions of the 2029 Notes in shares of common stock. Since the Company has the ability and intent to settle conversions in shares of common stock, it continued to classify the 2029 Notes as long-term debt on its condensed consolidated balance sheet as of June 30, 2024. Convertible Senior Notes Due 2025 In May 2020, the Company completed an offering of $287.5 million aggregate principal amount of 1.50% Convertible Senior Notes due 2025 (the 2025 Notes). The proceeds from the issuance of the Notes were $244.6 million, net of debt issuance costs and cash used to pay the cost of the capped call transactions (Capped Call Transactions) discussed below. In March 2024, the Company repurchased for cash $246.7 million in aggregate principal amount of the 2025 Notes, concurrently with the pricing of the 2029 Notes in privately negotiated transactions. The 2025 Notes are the Company’s senior unsecured obligations. Interest is payable in cash semi-annually in arrears beginning on November 1, 2020 at a rate of 1.50% per year. The 2025 Notes mature on May 1, 2025 unless repurchased, redeemed, or converted in accordance with their terms before the maturity date. As of June 30, 2024 the outstanding balance of the 2025 Notes was classified in current liabilities on the Company’s condensed consolidated balance sheets. The 2025 Notes are convertible into cash, shares of the Company’s common stock, or a combination of cash and shares of the Company’s common stock, at the Company’s election, at an initial conversion rate of 8.8836 shares of common stock per $1,000 principal amount of the 2025 Notes, which is equivalent to an initial conversion price of $112.57 (2025 Notes Conversion Price) per share of the Company’s common stock. The conversion rate is subject to customary adjustments for certain events as described in the indenture governing the 2025 Notes. The Company has the option to redeem for cash all or any portion of the 2025 Notes on or after May 6, 2023 if the last reported sale price of the Company’s common stock has been at least 130% of the 2025 Notes Conversion Price then in effect for at least 20 trading days (whether or not consecutive), including the trading day immediately preceding the date on which the Company provides notice of redemption, during any 30 consecutive trading day period, at a redemption price equal to 100% of the principal amount of the 2025 Notes to be redeemed, plus accrued and unpaid interest. No sinking fund is provided for the 2025 Notes. Holders of the 2025 Notes may convert all or a portion of their 2025 Notes at their option before November 1, 2024, in multiples of $1,000 principal amounts, only under the following circumstances: • if the last reported sale price of the Company’s common stock for at least 20 trading days (whether or not consecutive) during the period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the applicable conversion price of the 2025 Notes on each such trading day; • during the five business day period after any five consecutive trading day period in which the trading price per $1,000 principal amount of the 2025 Notes for each day of that five consecutive trading day period was less than 98% of the product of the last reported sale price of the Company’s common stock and the applicable conversion rate of the 2025 Notes on such trading day; • if the Company calls any or all of the 2025 Notes for redemption, at any time prior to the close of business on the scheduled trading day immediately preceding the redemption date; or • on the occurrence of specified corporate events. On or after November 1, 2024, until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert their Notes at any time, regardless of the foregoing circumstances. Upon conversion, the Company will pay or deliver, as the case may be, cash, shares of common stock or a combination of cash and shares of common stock, at the Company’s election, in the manner and subject to the terms and conditions provided in the indenture governing the 2025 Notes. Holders of the 2025 Notes who convert in connection with a make-whole fundamental change or in connection with a redemption are entitled to an increase in the conversion rate. Additionally, in the event of a fundamental change, holders of the 2025 Notes may require us to repurchase all or a portion of the 2025 Notes at a price equal to 100% of the principal amount of the Notes, plus any accrued and unpaid interest. The net carrying amount of the Company’s convertible senior notes on the condensed consolidated balance sheets consisted of the following (in thousands): June 30, 2024 December 31, 2023 Principal amount: Convertible Senior Notes Due 2025 $ 40,760 $ 287,500 Convertible Senior Notes Due 2029 316,250 * Total principal amount 357,010 287,500 Unamortized debt issuance costs (9,078) (2,465) Total debt, net $ 347,932 $ 285,035 Less: current portion $ (40,540) $ — Long-term senior convertible notes $ 307,392 $ 285,035 * Not applicable as no notes were outstanding at this date. As of June 30, 2024 and December 31, 2023, the if-converted value of the 2025 Notes did not exceed the principal amount. As of June 30, 2024, the if-converted value of the 2029 Notes exceeded the principal amount by $52.4 million. The following table summarizes the effective interest rates for each of our convertible senior notes for the periods shown: June 30, 2024 June 30, 2023 Effective interest rate: Convertible Senior Notes Due 2025 2.2 % 2.2 % Convertible Senior Notes Due 2029 2.1 % * * Not applicable as no notes were outstanding at this date. The following table details interest expense related to the Notes recognized for the three and six months ended June 30, 2024, and 2023 (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Contractual interest expense $ 1,339 $ 1,078 $ 2,484 $ 2,156 Amortization of debt issuance costs 435 450 902 897 Total interest expense $ 1,774 $ 1,528 $ 3,386 $ 3,053 2029 Capped Call Transactions In connection with the issuance of the 2029 Notes, the Company entered into Capped Call Transactions in March 2024 with certain counterparties at a net cost of $15.8 million (2029 Capped Call Transactions). The 2029 Capped Call Transactions are expected generally to reduce potential dilution to the Common Stock upon any conversion of the 2029 Notes and/or offset any cash payments the Company is required to make in excess of the principal amount of converted 2029 Notes, as the case may be, with such reduction and/or offset subject to a cap based on a cap price initially equal to $42.0128 per share, and is subject to certain adjustments under the terms of the 2029 Capped Call Transactions. 2025 Capped Call Transactions In connection with the issuance of the 2025 Notes, the Company entered into Capped Call Transactions in May 2020 with certain counterparties at a net cost of $34.1 million (2025 Capped Call Transactions). The 2025 Capped Call Transactions are expected generally to reduce potential dilution to the Common Stock upon any conversion of the 2025 Notes and/or offset any cash payments the Company is required to make in excess of the principal amount of converted 2025 Notes, as the case may be, with such reduction or offset subject to a cap. The cap price of the 2025 Capped Call Transactions is initially $173.18 per share of the Company’s common stock, and is subject to certain adjustments under the terms of the 2025 Capped Call Transactions. In connection with the repurchase of certain 2025 Notes, the Company entered into unwind agreements with the existing option counterparties on March 5, 2024 to terminate a portion of the existing 2025 Capped Call Transactions in a notional amount corresponding to the amount of 2025 Notes repurchased (the Unwind Transactions). In connection with the Unwind Transactions, the Company received $0.2 million in cash as a termination payment in respect of the portion of the existing 2025 Capped Call Transactions that were unwound. The amount received was based generally on the termination values of the unwound portions of the existing 2025 Capped Call Transactions. For accounting purposes, each of the capped call transactions described above are separate transactions, and not part of the terms of the 2029 Notes or the 2025 Notes. As these transactions met certain criteria under the applicable accounting guidance, each of the capped call transactions were recorded in stockholders' equity and were not accounted for as derivatives. The cost of the transactions was recorded as a reduction of the Company’s additional paid-in capital in the Company’s condensed consolidated balance sheet and will not be remeasured.

Stockholders' Equity

Stockholders' Equity	6 Months Ended
Stockholders' Equity	Jun. 30, 2024
Equity [Abstract]
Stockholders' Equity	Stockholders’ Equity Shares Reserved for Future Issuance The following shares of the Company's common stock were reserved for future issuance at June 30, 2024 (in thousands): Shares reserved for issuance upon conversion of Convertible Senior Notes 9,513 Shares underlying outstanding warrants 194 Shares underlying outstanding stock options 3,711 Shares underlying unvested restricted stock units 4,260 Shares authorized for issuance pursuant to awards granted under the ESPP 3,052 Shares authorized for future equity award grants 1,895 Total 22,625 Common Stock Warrants Warrants outstanding to purchase shares of the Company's common stock as of June 30, 2024 were as follows: Issue Date Exercise Price Per Share Warrants Outstanding Expiration Date of Warrants Outstanding March 2017 $23.50 193,788 March 2027 Each warrant allows the holder to purchase one share of common stock at the per share exercise price of the warrant. Stock Incentive Plans In May 2023, the Company’s stockholders approved the 2023 Long-Term Incentive Plan (2023 Plan), under which 2,602,184 shares of common stock were initially reserved for issuance. Under the 2023 Plan, the Company may grant stock options, stock appreciation rights, restricted stock and restricted stock units to individuals who are then employees, officers, directors or consultants of the Company. The 2023 Plan replaced the Company’s Amended and Restated 2013 Stock Incentive Plan (2013 Plan), and no further equity awards will be granted under the 2013 Plan. In May 2024, the Company’s stockholders approved the 2023 Long-Term Incentive Plan, as amended, to increase the number of shares authorized for issuance under the plan by 3,000,000 shares. Stock-Based Compensation The following table summarizes the allocation of stock-based compensation expense included in the condensed consolidated statements of operations for all stock-based compensation arrangements (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Cost of sales $ 1,760 $ 1,749 $ 3,830 $ 3,343 Selling, general and administrative 15,518 14,871 28,807 28,982 Research and development 7,619 6,781 14,299 12,269 Total stock-based compensation expense $ 24,897 $ 23,401 $ 46,936 $ 44,594 The total stock-based compensation expense capitalized as part of the cost of the Company’s inventories was $1.6 million at June 30, 2024, and $2.0 million at December 31, 2023. Restricted Stock Units Restricted stock units (RSUs) have a grant value equal to the closing price of the Company’s common stock on the award date. The total number of RSUs granted and the respective weighted average grant date fair value were as follows: Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 RSUs granted 1,694,239 1,635,679 2,052,298 1,789,825 Weighted average grant date fair value (per share) $ 48.30 $ 27.61 $ 44.30 $ 28.92 Employee Stock Purchase Plan In May 2024, the Company's stockholders approved the 2013 Employee Stock Purchase Plan, as amended, to increase the number of shares authorized for issuance under the plan by 3,000,000 shares. The Company records stock-based compensation expense associated with the ESPP using the Black-Scholes option pricing model. Valuations are performed on the grant date at the beginning of the purchase period, which generally occurs in May and November of each year. The assumptions used in the Black-Scholes option pricing model for the ESPP were as follows: Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Weighted average grant date fair value (per share) $ 21.45 $ 12.52 $ 21.45 $ 12.52 Risk-free interest rate 5.1 % 4.7 % 5.1 % 4.7 % Dividend yield 0.0 % 0.0 % 0.0 % 0.0 % Expected volatility 70.2 % 60.9 % 70.2 % 60.9 % Expected term (in years) 1.3 1.3 1.3 1.3

Employee Benefits

Employee Benefits	6 Months Ended
Employee Benefits	Jun. 30, 2024
Retirement Benefits [Abstract]
Employee Benefits	Employee Benefits Employee 401(k) Plan

Income Taxes

Income Taxes	6 Months Ended
Income Taxes	Jun. 30, 2024
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes For the three and six months ended June 30, 2024, the Company recognized income tax expense of $1.1 million and $4.3 million, respectively, on a pre-tax loss of $29.7 million and $69.3 million, respectively. The Company calculated the provision for income taxes for the three and six months ended June 30, 2024 by applying an estimate of the annual effective tax rate for the full year to ordinary income (loss) adjusted by the tax impact of discrete items. Income tax expense for the three and six months ended June 30, 2024 was primarily attributable to federal, state and foreign income tax expense as a result of current taxable income in certain jurisdictions. For the three and six months ended June 30, 2023, the Company recognized income tax expense of $1.1 million and $1.4 million, respectively, on a pre-tax loss of $34.6 million and $158.2 million, respectively. Income tax expense for the three and six months ended June 30, 2023 was primarily attributable to federal, state and foreign income tax expense as a result of current taxable income in certain jurisdictions. The Company calculated the provision for three and six months ended June 30, 2023 using a discrete effective tax rate method as the annual effective tax rate method would not provide a reliable estimate. The Company continues to maintain a full valuation allowance against its net deferred tax assets as of June 30, 2024, based on the current assessment that it is not more likely than not these future benefits will be realized before expiration.

Business Segment and Geographic

Business Segment and Geographic Information	6 Months Ended
Business Segment and Geographic Information	Jun. 30, 2024
Segment Reporting [Abstract]
Business Segment and Geographic Information	Business Segment and Geographic Information Segment Reporting Operating segments are identified as components of an enterprise about which discrete financial information is available for evaluation by the chief operating decision-maker (CODM) in making decisions regarding resource allocation and assessing performance. The Company is organized based on its current product portfolio, which consists primarily of insulin pumps, single-use insulin cartridges and infusion sets for the storage and delivery of insulin. The Company views its operations and manages its business as one segment and a single reporting unit because key operating decisions and resource allocations are made by the CODM using consolidated financial data. Disaggregation of Revenue The Company primarily sells its products through national and regional distributors in the United States on a non-exclusive basis, and through distribution partners outside the United States. In the United States and Canada, the Company also uses a direct sales force. The Company disaggregates its revenue by geography, major sales channel and product as management believes these categories best depict how the nature, amount and timing of revenues and cash flows are affected by economic factors. Revenues by Geographic Region and Customer Sales Channel During the three and six months ended June 30, 2024 and 2023, no individual country outside the United States generated revenue that represented more than 10% of total revenue. The table below sets forth revenues for the Company’s two primary geographical markets, based on the geographic location to which its products are shipped (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 United States $ 156,711 $ 142,501 $ 286,472 $ 273,743 Outside the United States 65,199 53,416 127,112 91,557 Total Sales $ 221,910 $ 195,917 $ 413,584 $ 365,300 Sales to distributors accounted for 63% and 62% of the Company’s United States sales for the three and six months ended June 30, 2024, respectively, and 64% and 65% of the Company’s United States sales for the three and six months ended June 30, 2023, respectively. Sales to distributors accounted for the vast majority of the Company’s sales outside the United States for the three and six-month periods ended June 30, 2024 and 2023. Revenues by Product During the three and six months ended June 30, 2024 and 2023, sales by product were as follows (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Pump $ 107,875 $ 101,677 $ 195,162 $ 186,379 Supplies and other 113,881 96,549 219,414 183,253 Net revenue recognized (deferred) for Tandem Choice program 154 (2,309) (992) (4,332) Total Sales $ 221,910 $ 195,917 413,584 365,300

Acquisitions

Acquisitions	6 Months Ended
Acquisitions	Jun. 30, 2024
Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]
Acquisitions	Acquisitions AMF Medical Acquisition On December 10, 2022, the Company entered into a Share Purchase Agreement (Purchase Agreement) with AMF Medical SA, a corporation organized and existing under the laws of Switzerland (AMF Medical), and its shareholders to acquire all of the registered shares of AMF Medical (Transaction). AMF Medical is the developer of the Sigi Patch Pump, which is designed to be an ergonomic, rechargeable patch pump that reduces the burden of managing diabetes through its use of pre-filled insulin cartridges. The Sigi Patch Pump is under development and not commercially available. On January 19, 2023, the Company completed the acquisition of AMF Medical under the terms of the Purchase Agreement. The total aggregate consideration for the Transaction includes a previous strategic investment of Swiss Francs (CHF) 8.0 million made in the third quarter of 2022, a cash payment of CHF 62.4 million paid at the closing of the Transaction, and additional contingent earnout payments of up to CHF 129.6 million. The contingent earnout payments become payable upon the achievement of certain milestones, and are comprised of a payment of up to CHF 38.4 million upon the successful completion of key development milestones over the two years following the closing date of the Transaction, and a payment of up to CHF 91.2 million upon obtaining regulatory clearance from the FDA of an automated controller enabled (ACE) pump. The contingent consideration will be recognized as each contingency is resolved and the respective consideration is paid or becomes payable. As of June 30, 2024, the contingencies related to the earnout milestones were not yet resolved and, therefore, the related amounts were not included in the fair value of the asset acquired and were not recognized as a liability on the consolidated balance sheet at June 30, 2024. The Company funded the initial closing payment using existing cash balances. The transaction was accounted for as an asset acquisition as substantially all the value of the gross assets was concentrated in a single asset. The Company recorded a $78.8 million charge in 2023 representing the value of acquired in-process research and development assets with no alternative future use, and acquisition related expenses, on its condensed consolidated statements of operations in acquired in-process research and development expenses. The Company’s results of operations included the operating results of AMF Medical since the date of acquisition.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
Commitments and Contingencies	Jun. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Legal and Regulatory Matters On September 8, 2023, a purported stockholder of the Company filed a putative securities class action complaint (captioned Lowe v. Tandem Diabetes Care, Inc., et al., Case No. 23-cv-1657 (“ Lowe ”)) in the United States District Court for the Southern District of California against the Company and certain of the Company’s current executive officers (“defendants”). On December 6, 2023, the court appointed Mason Raines, Thomas O. Martel, and Linna Rae Martel to serve as co-lead plaintiffs (“plaintiffs”). On February 1, 2024, the plaintiffs filed their amended complaint. In the amended complaint, the plaintiffs allege violations of the Securities Exchange Act of 1934, as amended, based on alleged materially false and misleading statements relating to our sales trends and financial forecasts. The plaintiffs seek to represent a class of persons who purchased or otherwise acquired Tandem common stock during the period between August 3, 2022, and November 2, 2022, inclusive. The plaintiffs also seek unspecified monetary damages, pre- and post-judgment interest, costs and fees, including attorneys’ fees and expert fees, and other relief. The defendants filed their motion to dismiss the amended complaint on March 11, 2024. The plaintiffs filed a response in opposition to defendants’ motion to dismiss on March 27, 2024, and on April 10, 2024, defendants filed their reply. On April 29, 2024, the court granted defendants’ motion to dismiss with leave to file a second amended complaint within 30 days. The plaintiffs did not file a second amended complaint within 30 days. On June 4, 2024, the Court entered final judgment dismissing the action in its entirety with prejudice. On July 5, 2024, the plaintiffs’ deadline to appeal the final judgment expired. Two shareholder derivative cases were filed in the United States District Court for the Southern District of California on March 29, 2024 (captioned Bushansky v. John F. Sheridan et al. , Case No. 24-cv-608) and on April 23, 2024 (captioned Amersi v. John F. Sheridan et al. , Case No. 24-cv-726) against the individual members of Tandem’s Board of Directors and the Company. These shareholder derivative lawsuits piggyback on the Lowe case, and allege that Tandem’s Board breached its fiduciary duties by failing to properly oversee and monitor the risks affecting the Company’s business, which resulted in reduced guidance, an associated stock drop, and the Lowe case. On May 16, 2024, the parties in the derivative actions filed a joint motion regarding consolidation and appointment of counsel. On June 13, 2024, the joint motion was granted and the derivative actions were consolidated. On July 12, 2024, the parties filed a joint request for voluntary dismissal of the consolidated derivative actions without prejudice. On the same day, July 12, 2024, the court granted the parties’ joint request and dismissed the consolidated derivative actions without prejudice. Although the Company intends to vigorously defend against these claims, there is no guarantee that the Company will prevail. Accordingly, the Company is unable to determine the ultimate outcome of these lawsuits or determine the amount or range of potential losses associated with these lawsuits. From time to time, the Company is involved in various other legal proceedings, regulatory matters, and other disputes or claims arising from or related to claims incident to the normal course of the Company’s business activities, including actions with respect to intellectual property, data privacy, employment, regulatory, product liability and contractual matters. Although the results of such legal proceedings and claims cannot be predicted with certainty, as of June 30, 2024 the Company believes it is not currently a party to any legal proceedings, regulatory matters, or other disputes or claims for which a material loss was considered probable or for which the amount (or range) of loss was reasonably estimable. However, regardless of the merit of the claims raised or the outcome, legal proceedings may have an adverse impact on the Company as a result of defense and settlement costs, diversion of management time and resources, and other factors. Letters of Credit As of June 30, 2024, in connection with one of the Company’s operating leases (see Note 6, “Leases”), the Company had a $4.9 million unsecured irrevocable standby letter of credit arrangement with a bank, under which the landlord of the building is the beneficiary. The Company is required to maintain the standby letter of credit throughout the term of the lease, which expires in April 2035.

Organization and Basis of Pre_2

Organization and Basis of Presentation (Policies)	6 Months Ended
Organization and Basis of Presentation (Policies)	Jun. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
The Company	The Company Tandem Diabetes Care, Inc. is a medical device company focused on the design, development and commercialization of technology solutions for people living with diabetes. Tandem Diabetes Care, Inc. is incorporated in the state of Delaware. Unless the context requires otherwise, the terms the “Company” or “Tandem” refer to Tandem Diabetes Care, Inc., together with its wholly-owned subsidiaries. The Company manufactures, sells, and supports insulin pump products that are designed to address the evolving needs and preferences of differentiated segments of the insulin-dependent diabetes market. The Company recently expanded its portfolio, which now includes both the t:slim X2 Insulin Delivery System (t:slim X2) and the Tandem Mobi insulin pumps. Both pumps have an advanced algorithm for managing insulin delivery, using information received from integrated continuous glucose monitoring (CGM) sensors. The software on the insulin pump products may be updated remotely by the individual users as new advancements become available and are compatible with other complementary digital health offerings, such as the mobile application and cloud-based diabetes management applications. The Company’s insulin pump products are generally considered durable medical equipment and have an expected lifespan of at least four years. In addition to insulin pumps, the Company sells single-use products that are used together with the pumps and are replaced every few days, including cartridges for storing and delivering insulin, and infusion sets that connect the insulin pump to a user’s body.
Basis of Presentation and Principles of Consolidation	Basis of Presentation and Principles of Consolidation The Company has prepared the accompanying unaudited condensed consolidated financial statements in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) for interim financial information and pursuant to the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and disclosures required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments which are of a normal and recurring nature and considered necessary for a fair presentation of the financial information contained herein, have been included. Interim financial results are not necessarily indicative of results anticipated for the full year or any other period(s). These unaudited condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023 (Annual Report), from which the balance sheet information herein was derived. The condensed consolidated financial statements include the accounts of Tandem Diabetes Care, Inc. and its wholly-owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation. The functional currency of the Company’s foreign subsidiaries is their respective local currency. The Company translates the financial statements of its foreign subsidiaries into U.S. dollars using period-end exchange rates for assets and liabilities and average exchange rates for each period for revenue, costs and expenses. Translation related adjustments are included in other comprehensive income (loss) in the condensed consolidated statements of operations, and in accumulated other comprehensive income (loss) in the stockholders’ equity section of the Company’s condensed consolidated balance sheets. Foreign exchange gains or losses resulting from balances denominated in a currency other than the functional currency are recognized in interest income and other, net in the Company’s condensed consolidated statements of operations.
Use of Estimates	Use of Estimates The preparation of the condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses and the disclosure of contingent assets and liabilities in the Company’s condensed consolidated financial statements and accompanying notes as of the date of the condensed consolidated financial statements. Some of those judgments can be subjective and complex, and therefore, actual results could differ materially from those estimates under different assumptions or conditions.
Accounts Receivable	Accounts Receivable The Company grants credit to various customers in the ordinary course of business and is paid directly by customers who use its products, distributors and third-party insurance payors. The Company maintains an allowance for its current estimate of expected credit losses. Provisions for expected credit losses are estimated based on historical experience, assessment of specific customer-related risks, review of outstanding invoices, forecasts about the future, and various other assumptions and estimates that are believed to be reasonable under the circumstances, including changes to credit risks as a result of recessionary concerns, changes in discretionary spending, increased interest rates, and other macroeconomic factors. Uncollectible accounts are written off against the allowance after appropriate collection efforts have been exhausted and when it is deemed that a balance is uncollectible.
Operating Lease Right-of-Use Assets and Liabilities	Operating Lease Right-of-Use Assets and Liabilities Operating lease right-of-use assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent its obligation to make lease payments arising from the lease. Operating lease right-of-use assets and liabilities are recognized when the Company takes possession of the leased property (Commencement Date) based on the present value of lease payments over the lease term. For lease agreements that contain lease and non-lease components, the Company accounts for both of those components as a single lease component. Rent expense on noncancelable leases containing known future scheduled rent increases is recorded on a straight-line basis over the term of the respective leases beginning on the Commencement Date. The difference between rent expense and rent paid is accounted for as a component of operating lease right-of-use assets on the Company’s condensed consolidated balance sheets. Landlord improvement allowances and other similar lease incentives are recorded as a reduction of the right-of-use leased assets, and are amortized on a straight-line basis as a reduction to operating lease costs.
Intangible Assets Subject to Amortization	Intangible Assets Subject to Amortization Finite-lived intangible assets are recorded at cost, net of accumulated amortization and, if applicable, impairment charges. Amortization of finite-lived intangible assets is recognized over their estimated useful lives on a straight-line basis. The Company did not recognize any intangible asset impairment losses during the three and six months ended June 30, 2024 and 2023.
Strategic Investments	Strategic Investments The Company held equity investments totaling $30.4 million and $10.1 million in private companies at June 30, 2024 and December 31, 2023, respectively. The investments were included as a component of other long-term assets on the condensed consolidated balance sheets at June 30, 2024 and December 31, 2023. The investments are carried at cost minus impairment, if any, adjusted for changes in observable prices. The Company monitors these investments to evaluate whether any increase or decline in its value has occurred, based on the implied value of recent company financings, public market prices of comparable companies and general market conditions. During the three and six months ended June 30, 2024, the Company recorded an impairment charge of $2.0 million related to one of its investments in a private company. The Company did not record any impairment charges related to its strategic investments in the three and six months ended June 30, 2023. Approximately $22.2 million of the total strategic investments balance was previously held in the form of subordinated convertible notes of one private investee company. The subordinated notes were converted into equity of the private company at final maturity, which occurred in June 2024. As a result of the note conversion, the Company received shares of the private investee company. As of June 30, 2024, and December 31, 2023, each of the Company’s equity investments in private companies represented less than 15% of the outstanding equity of the respective private company.
Revenue Recognition	Revenue Recognition Revenue is generated primarily from sales of insulin pumps, single-use insulin cartridges and infusion sets to individual customers with third-party insurance coverage and through a network of distributors that resell the products to insulin-dependent diabetes customers. The Company recognizes revenue when it transfers control of the promised goods or services to customers in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services, net of estimated rebates and returns. Revenue Recognition for Arrangements with Multiple Performance Obligations The Company considers the individual deliverables in its product offerings to be separate performance obligations. The transaction price is determined based on the consideration expected to be received, based either on the stated value in contractual arrangements or the estimated cash to be collected in non-contracted arrangements. The Company allocates the consideration to the individual performance obligations and recognizes the consideration based on when the performance obligation is satisfied, considering whether or not this occurs at a point in time or over time. Generally, insulin pumps, cartridges, infusion sets, and accessories are deemed performance obligations that are satisfied at a point in time when the customer obtains control of the promised good, which typically is upon shipment for our distributor arrangements and upon receipt for sales directly to individual customers. Complementary products, such as the Company’s data management and software update platforms, are considered distinct performance obligations that are satisfied over time, as access and support for these products is provided throughout the typical four-year warranty period of the insulin pumps. Accordingly, revenue related to the complementary products is deferred and recognized over a four-year period. Where there is no standalone value for the complementary product, the Company determines its value by applying the expected cost plus a margin approach and then allocates the residual to the insulin pumps. Revenue Recognition for Tandem Choice Program In September 2022, the Company launched a new technology access program referred to as Tandem Choice, that provides eligible, in-warranty t:slim X2 customers in the United States with the flexibility to obtain the newest hardware platform, Tandem Mobi, when commercially available. Participating customers have the right to purchase the alternative Tandem pump for a fee, referred to as a choice right. The program was determined to create a material right for which a portion of each t:slim X2 pump transaction price was allocated and deferred. The Company determined that the ability for a customer to upgrade to a new technology represents a material right because the pricing inherent in such option provides the customer with a discount that is incremental to the range of discounts that would otherwise be granted for the related goods and services to comparable customers. The standalone selling price for the choice right was estimated based on the adjusted market assessment approach and contemplated the likelihood that the respective option will be exercised. The Company began selling Tandem Mobi insulin pumps in the first quarter of 2024 and eligibility for the Tandem Choice program ended in February 2024. Consequently, the Company ceased to allocate and defer a portion of the transaction price for the material right for pumps sold after that date. Eligible customers who purchased a t:slim X2 insulin pump during the program period will have until December 31, 2024 to exercise the option to switch to the Tandem Mobi for a stated fee. The Company will recognize the deferred amount of sales at the earlier of when the obligations under the Tandem Choice program are satisfied or when the program expires. If a customer elects to participate in the program, the Company will recognize upgrade fees received, and the associated cost of goods sold at the time of fulfilling the obligation. For the six months ended June 30, 2024, the Company deferred $1.1 million of pump sales that qualified for Tandem Choice, and recognized incremental sales of $0.2 million from individual Tandem Choice fulfillments. Sales Rebates The Company is subject to certain rebates on pricing programs with managed care organizations, such as governmental and third-party commercial payors. The Company estimates provisions for rebates based on contractual arrangements, estimates of products sold subject to rebate, known events or trends and channel inventory data. Estimated sales rebates included in other long-term liabilities have an estimated payment due date beyond twelve months from the balance sheet date. Accordingly, actual rebates paid may differ from estimated amounts recorded in the accompanying condensed consolidated financial statements.
Warranty Reserve	Warranty Reserve
Stock-Based Compensation	Stock-Based Compensation Stock-based compensation cost is measured at the grant date based on the estimated fair value of the award, and the portion that is ultimately expected to vest is recognized as compensation expense over the requisite service period on a straight-line basis. The Company estimates the fair value of stock options issued under the Company’s stock incentive plans, and the fair value of the employees’ purchase rights under the Company’s Employee Stock Purchase Plan (ESPP) using the Black-Scholes option pricing model on the date of grant. The Black-Scholes option pricing model requires the use of assumptions about a number of variables, including stock price volatility, expected term, dividend yield and risk-free interest rate (see Note 8, “Stockholders’ Equity”). The fair value of restricted stock unit (RSU) awards issued under the Company’s stock incentive plans that vest solely based on service, is estimated based on the fair market value of the underlying stock on the date of grant. The fair value of RSU awards that vest based upon the Company’s actual performance relative to predefined performance metrics and the awardee’s continuing service through the measurement date is generally estimated based on the fair market value of the underlying stock on the date of grant and the probability that the specified performance criteria will be met. At each reporting period, the Company reassesses the probability of the achievement of such performance metrics. Any expense change resulting from an adjustment in the estimated shares to be released is recorded in the period of adjustment.
Net Income (Loss) Per Share	Net Income (Loss) Per Share
Fair Value of Financial Instruments	Fair Value of Financial Instruments The carrying amounts of cash and cash equivalents, accounts receivable, accounts payable, accrued expenses, and employee-related liabilities are reasonable estimates of their fair values because of the short-term nature of these assets and liabilities. Short-term investments are carried at fair value.
Segment Reporting	Segment Reporting Operating segments are identified as components of an enterprise about which discrete financial information is available for evaluation by the chief operating decision-maker (CODM) in making decisions regarding resource allocation and assessing performance. The Company is organized based on its current product portfolio, which consists primarily of insulin pumps, single-use insulin cartridges and infusion sets for the storage and delivery of insulin. The Company views its operations and manages its business as one segment and a single reporting unit because key operating decisions and resource allocations are made by the CODM using consolidated financial data.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Tables)	6 Months Ended
Summary of Significant Accounting Policies (Tables)	Jun. 30, 2024
Accounting Policies [Abstract]
Schedule of Estimated Sales Rebates	As of June 30, 2024 and December 31, 2023, total estimated sales rebates were included in the following condensed consolidated balance sheet accounts (in thousands): June 30, 2024 December 31, 2023 Other current liabilities $ 490 $ 505 Other long-term liabilities 8,494 8,042 Total sales rebate $ 8,984 $ 8,547
Schedule of Reconciliation of Change in Estimated Warranty Liabilities	The following table provides a reconciliation of the changes in product warranty liabilities for the three and six months ended June 30, 2024 and 2023 (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Balance at beginning of the period $ 37,638 $ 37,152 $ 37,173 $ 36,537 Provision for warranties issued during the period 9,581 8,915 19,990 17,288 Settlements made during the period (9,062) (7,385) (18,099) (15,068) Increases (decreases) in warranty estimates (801) 235 (1,708) 160 Balance at end of the period $ 37,356 $ 38,917 $ 37,356 $ 38,917 As of June 30, 2024 and December 31, 2023, total product warranty reserves were included in the following condensed consolidated balance sheet accounts (in thousands): June 30, 2024 December 31, 2023 Other current liabilities $ 18,155 $ 18,135 Other long-term liabilities 19,201 19,038 Total warranty reserve $ 37,356 $ 37,173
Schedule of Anti-Dilutive Securities	Potentially dilutive securities outstanding and not included in the calculation of diluted net loss per share (because inclusion would be anti-dilutive) are as follows (in thousands, in common stock equivalent shares): Three Months Ended Six Months Ended June 30, 2024 2023 2024 2023 Options to purchase common stock 804 138 129 138 Unvested restricted stock units 3,322 2,032 2,865 1,677 Warrants to purchase common stock 194 194 194 194 Awards granted under the ESPP 59 32 29 16 Convertible senior notes (if-converted) 9,513 2,554 6,877 2,554 13,892 4,950 10,094 4,579

Short-Term Investments (Tables)

Short-Term Investments (Tables)	6 Months Ended
Short-Term Investments (Tables)	Jun. 30, 2024
Investments, Debt and Equity Securities [Abstract]
Schedule of Estimated Fair Value of Short-Term Investments	The following represents a summary of the estimated fair value of short-term investments at June 30, 2024 and December 31, 2023 (in thousands): At June 30, 2024 Amortized Gross Unrealized Gross Unrealized Estimated Available-for-sale securities: United States Government-sponsored enterprises $ 176,311 $ 37 $ (754) $ 175,594 United States Treasury securities 90,505 14 (189) 90,330 Commercial paper 45,520 1 (52) 45,469 Corporate debt securities 93,392 70 (137) 93,325 Total $ 405,728 $ 122 $ (1,132) $ 404,718 At December 31, 2023 Amortized Gross Unrealized Gross Unrealized Estimated Available-for-sale securities: United States Government-sponsored enterprises $ 181,851 $ 518 $ (215) $ 182,154 United States Treasury securities 114,714 318 (28) 115,004 Commercial paper 72,505 33 (27) 72,511 Corporate debt securities 39,225 156 (6) 39,375 Total $ 408,295 $ 1,025 $ (276) $ 409,044
Schedule of Contractual Maturities of Available -For-Sale Debt Securities	The contractual maturities of available-for-sale debt securities as of June 30, 2024, were as follows (in thousands): Years to Maturity At June 30, 2024 Within One Year One to Two Years Two to Three Years Estimated Fair Value United States Government-sponsored enterprises $ 66,707 $ 30,914 $ 77,973 $ 175,594 United States Treasury securities 54,404 34,941 985 90,330 Commercial paper 45,469 — — 45,469 Corporate debt securities 53,092 40,233 — 93,325 Total $ 219,672 $ 106,088 $ 78,958 $ 404,718

Composition of Certain Financ_2

Composition of Certain Financial Statement Items (Tables)	6 Months Ended
Composition of Certain Financial Statement Items (Tables)	Jun. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Accounts Receivable	Accounts receivable, net consisted of the following at June 30, 2024 and December 31, 2023 (in thousands): June 30, December 31, 2024 2023 Accounts receivable $ 103,342 $ 110,453 Less: allowance for credit losses (5,225) (4,898) Accounts receivable, net $ 98,117 $ 105,555
Schedule of Reconciliation of Changes in the Allowance for Estimated Accounts Receivable Credit Losses	The following table provides a reconciliation of the changes in the allowance for estimated accounts receivable credit losses for the three and six months ended June 30, 2024 and 2023 (in thousands): Three Months Ended Six Months Ended June 30, 2024 2023 2024 2023 Balance at beginning of the period $ 4,923 $ 4,467 $ 4,898 $ 4,327 Provision for expected credit losses 1,525 1,372 3,723 2,758 Write-offs and adjustments, net of recoveries (1,223) (997) (3,396) (2,243) Balance at end of the period $ 5,225 $ 4,842 $ 5,225 $ 4,842
Schedule of Inventories	Inventories consisted of the following at June 30, 2024 and December 31, 2023 (in thousands): June 30, December 31, 2024 2023 Raw materials $ 45,457 $ 42,783 Work-in-process 28,455 44,026 Finished goods 87,749 71,128 Total inventories $ 161,661 $ 157,937

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
Fair Value Measurements (Tables)	Jun. 30, 2024
Fair Value Disclosures [Abstract]
Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis	The following table presents information about the Company’s financial assets and liabilities measured at fair value on a recurring basis as of June 30, 2024 and December 31, 2023, and indicates the fair value hierarchy of the valuation techniques used by the Company to determine such fair value (in thousands): Fair Value Measurements at June 30, 2024 Total Level 1 Level 2 Level 3 Assets Cash equivalents (1) $ 34,513 $ 34,513 $ — $ — United States Government-sponsored enterprises 175,594 — 175,594 — United States Treasury securities 90,330 90,330 — — Commercial paper 45,469 — 45,469 — Corporate debt securities 93,325 — 93,325 — Total assets $ 439,231 $ 124,843 $ 314,388 $ — Fair Value Measurements at December 31, 2023 Total Level 1 Level 2 Level 3 Assets Cash equivalents (1) $ 48,033 $ 48,033 $ — $ — United States Government-sponsored enterprises 182,154 — 182,154 — United States Treasury securities 115,004 115,004 — — Commercial paper 72,511 — 72,511 — Corporate debt securities 39,375 — 39,375 — Supranational bonds — — — — Total assets $ 457,077 $ 163,037 $ 294,040 $ — (1) Generally, cash equivalents include money market funds and investments with a maturity of three months or less from the date of purchase.
Schedule of Convertible Senior Notes	The Company estimated the fair value of its convertible senior notes based on Level 2 quoted market prices as follows (in thousands): Fair Value Measurements at June 30, 2024 December 31, 2023 Convertible Senior Notes due 2025 $ 39,130 $ 271,688 Convertible Senior Notes due 2029 438,701 * Total fair value of outstanding convertible senior notes $ 477,831 $ 271,688 * Not applicable as no notes were outstanding at this date. The net carrying amount of the Company’s convertible senior notes on the condensed consolidated balance sheets consisted of the following (in thousands): June 30, 2024 December 31, 2023 Principal amount: Convertible Senior Notes Due 2025 $ 40,760 $ 287,500 Convertible Senior Notes Due 2029 316,250 * Total principal amount 357,010 287,500 Unamortized debt issuance costs (9,078) (2,465) Total debt, net $ 347,932 $ 285,035 Less: current portion $ (40,540) $ — Long-term senior convertible notes $ 307,392 $ 285,035 The following table summarizes the effective interest rates for each of our convertible senior notes for the periods shown: June 30, 2024 June 30, 2023 Effective interest rate: Convertible Senior Notes Due 2025 2.2 % 2.2 % Convertible Senior Notes Due 2029 2.1 % * * Not applicable as no notes were outstanding at this date.

Leases (Tables)

Leases (Tables)	6 Months Ended
Leases (Tables)	Jun. 30, 2024
Leases [Abstract]
Schedule of Lease Cost	The Company’s lease costs recorded in the condensed consolidated statements of operations were as follows (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Operating lease cost $ 3,564 $ 4,299 $ 7,081 $ 8,774 Short-term lease cost 21 124 43 220 Loss on lease termination and right-of-use asset impairment charges — 11,224 — 11,224 Total lease cost $ 3,585 $ 15,647 $ 7,124 $ 20,218 The weighted-average remaining lease term and weighted-average discount rate for operating leases were as follows: June 30, 2024 December 31, 2023 Weighted-average remaining lease term (in years) 9.9 10.2 Weighted-average discount rate used to determine operating lease liabilities 5.3 % 5.4 %
Schedule of Future Minimum Payments Under Non-cancellable Operating Leases	Maturities of operating lease liabilities at June 30, 2024 were as follows (in thousands): Years Ending December 31, 2024 $ 8,874 2025 18,046 2026 17,946 2027 18,229 2028 14,714 Thereafter 90,004 Total undiscounted lease payments 167,813 Less: amount representing interest (38,631) Present value of operating lease liabilities 129,182 Less: current portion of operating lease liabilities (17,790) Operating lease liabilities - long-term $ 111,392

Debt (Tables)

Debt (Tables)	6 Months Ended
Debt (Tables)	Jun. 30, 2024
Debt Disclosure [Abstract]
Schedule of Convertible Senior Notes	The Company estimated the fair value of its convertible senior notes based on Level 2 quoted market prices as follows (in thousands): Fair Value Measurements at June 30, 2024 December 31, 2023 Convertible Senior Notes due 2025 $ 39,130 $ 271,688 Convertible Senior Notes due 2029 438,701 * Total fair value of outstanding convertible senior notes $ 477,831 $ 271,688 * Not applicable as no notes were outstanding at this date. The net carrying amount of the Company’s convertible senior notes on the condensed consolidated balance sheets consisted of the following (in thousands): June 30, 2024 December 31, 2023 Principal amount: Convertible Senior Notes Due 2025 $ 40,760 $ 287,500 Convertible Senior Notes Due 2029 316,250 * Total principal amount 357,010 287,500 Unamortized debt issuance costs (9,078) (2,465) Total debt, net $ 347,932 $ 285,035 Less: current portion $ (40,540) $ — Long-term senior convertible notes $ 307,392 $ 285,035 The following table summarizes the effective interest rates for each of our convertible senior notes for the periods shown: June 30, 2024 June 30, 2023 Effective interest rate: Convertible Senior Notes Due 2025 2.2 % 2.2 % Convertible Senior Notes Due 2029 2.1 % * * Not applicable as no notes were outstanding at this date.
Schedule of Interest Expense Recognized	The following table details interest expense related to the Notes recognized for the three and six months ended June 30, 2024, and 2023 (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Contractual interest expense $ 1,339 $ 1,078 $ 2,484 $ 2,156 Amortization of debt issuance costs 435 450 902 897 Total interest expense $ 1,774 $ 1,528 $ 3,386 $ 3,053

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	6 Months Ended
Stockholders' Equity (Tables)	Jun. 30, 2024
Equity [Abstract]
Schedule of Shares of Common Stock Reserved for Future Issuance	The following shares of the Company's common stock were reserved for future issuance at June 30, 2024 (in thousands): Shares reserved for issuance upon conversion of Convertible Senior Notes 9,513 Shares underlying outstanding warrants 194 Shares underlying outstanding stock options 3,711 Shares underlying unvested restricted stock units 4,260 Shares authorized for issuance pursuant to awards granted under the ESPP 3,052 Shares authorized for future equity award grants 1,895 Total 22,625
Schedule of Stockholders' Equity Common Stock Warrants	Warrants outstanding to purchase shares of the Company's common stock as of June 30, 2024 were as follows: Issue Date Exercise Price Per Share Warrants Outstanding Expiration Date of Warrants Outstanding March 2017 $23.50 193,788 March 2027
Schedule of Compensation Cost Included in Consolidated Statement of Operations	The following table summarizes the allocation of stock-based compensation expense included in the condensed consolidated statements of operations for all stock-based compensation arrangements (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Cost of sales $ 1,760 $ 1,749 $ 3,830 $ 3,343 Selling, general and administrative 15,518 14,871 28,807 28,982 Research and development 7,619 6,781 14,299 12,269 Total stock-based compensation expense $ 24,897 $ 23,401 $ 46,936 $ 44,594
Schedule of Restricted Stock Units	The total number of RSUs granted and the respective weighted average grant date fair value were as follows: Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 RSUs granted 1,694,239 1,635,679 2,052,298 1,789,825 Weighted average grant date fair value (per share) $ 48.30 $ 27.61 $ 44.30 $ 28.92
Schedule of Share-Based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions	The assumptions used in the Black-Scholes option pricing model for the ESPP were as follows: Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Weighted average grant date fair value (per share) $ 21.45 $ 12.52 $ 21.45 $ 12.52 Risk-free interest rate 5.1 % 4.7 % 5.1 % 4.7 % Dividend yield 0.0 % 0.0 % 0.0 % 0.0 % Expected volatility 70.2 % 60.9 % 70.2 % 60.9 % Expected term (in years) 1.3 1.3 1.3 1.3

Business Segment and Geograph_2

Business Segment and Geographic Information (Tables)	6 Months Ended
Business Segment and Geographic Information (Tables)	Jun. 30, 2024
Segment Reporting [Abstract]
Schedule of Disaggregation of Revenue	The table below sets forth revenues for the Company’s two primary geographical markets, based on the geographic location to which its products are shipped (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 United States $ 156,711 $ 142,501 $ 286,472 $ 273,743 Outside the United States 65,199 53,416 127,112 91,557 Total Sales $ 221,910 $ 195,917 $ 413,584 $ 365,300 During the three and six months ended June 30, 2024 and 2023, sales by product were as follows (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Pump $ 107,875 $ 101,677 $ 195,162 $ 186,379 Supplies and other 113,881 96,549 219,414 183,253 Net revenue recognized (deferred) for Tandem Choice program 154 (2,309) (992) (4,332) Total Sales $ 221,910 $ 195,917 413,584 365,300

Organization and Basis of Pre_3

Organization and Basis of Presentation (Details)	6 Months Ended
Organization and Basis of Presentation (Details)	Jun. 30, 2024
Insulin Pump \| Minimum
Organization And Basis Of Presentation [Line Items]
Expected life span term	4 years

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Summary Of Significant Accounting Policies [Line Items]
Investment owned at cost	$ 30,400		$ 30,400		$ 10,100
Impairment charges	$ 2,000		$ 2,000
Ownership interest of investment owned (less than)	15%		15%		15%
Sales	$ 221,910	$ 195,917	$ 413,584	$ 365,300
Guarantee liability current	31,000		31,000		$ 30,600
Convertible Senior Notes
Summary Of Significant Accounting Policies [Line Items]
Payments to acquire investments			$ 22,200
Insulin Pump
Summary Of Significant Accounting Policies [Line Items]
Warranty period offered			4 years
Deferred revenue	$ 1,100		$ 1,100
Slim cartridges and infusion sets
Summary Of Significant Accounting Policies [Line Items]
Warranty period offered			6 months
Tandem Choice Program
Summary Of Significant Accounting Policies [Line Items]
Sales			$ 200

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Total Estimated Sales Rebates (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Accounting Policies [Abstract]
Other current liabilities	$ 490	$ 505
Other long-term liabilities	8,494	8,042
Total sales rebate	$ 8,984	$ 8,547

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Reconciliation of Change in Estimated Warranty Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]
Balance at beginning of the period	$ 37,638	$ 37,152	$ 37,173	$ 36,537
Provision for warranties issued during the period	9,581	8,915	19,990	17,288
Settlements made during the period	(9,062)	(7,385)	(18,099)	(15,068)
Increases (decreases) in warranty estimates	(801)	235	(1,708)	160
Balance at end of the period	37,356	38,917	37,356	38,917
Other current liabilities	18,155		18,155		$ 18,135
Other long-term liabilities	19,201		19,201		19,038
Total warranty reserve	$ 37,356	$ 38,917	$ 37,356	$ 38,917	$ 37,173

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Anti-Dilutive Securities (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	13,892	4,950	10,094	4,579
Options to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	804	138	129	138
Unvested restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	3,322	2,032	2,865	1,677
Warrants to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	194	194	194	194
Awards granted under the ESPP
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	59	32	29	16
Convertible senior notes (if-converted)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	9,513	2,554	6,877	2,554

Short-Term Investments - Estima

Short-Term Investments - Estimated Fair Value of Short-Term Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Cash Cash Equivalents And Short Term Investments [Line Items]
Amortized Cost	$ 405,728	$ 408,295
Gross Unrealized Gain	122	1,025
Gross Unrealized Loss	(1,132)	(276)
Estimated Fair Value	404,718	409,044
United States Government-sponsored enterprises
Cash Cash Equivalents And Short Term Investments [Line Items]
Amortized Cost	176,311	181,851
Gross Unrealized Gain	37	518
Gross Unrealized Loss	(754)	(215)
Estimated Fair Value	175,594	182,154
United States Treasury securities
Cash Cash Equivalents And Short Term Investments [Line Items]
Amortized Cost	90,505	114,714
Gross Unrealized Gain	14	318
Gross Unrealized Loss	(189)	(28)
Estimated Fair Value	90,330	115,004
Commercial paper
Cash Cash Equivalents And Short Term Investments [Line Items]
Amortized Cost	45,520	72,505
Gross Unrealized Gain	1	33
Gross Unrealized Loss	(52)	(27)
Estimated Fair Value	45,469	72,511
Corporate debt securities
Cash Cash Equivalents And Short Term Investments [Line Items]
Amortized Cost	93,392	39,225
Gross Unrealized Gain	70	156
Gross Unrealized Loss	(137)	(6)
Estimated Fair Value	$ 93,325	$ 39,375

Short-Term Investments - Contra

Short-Term Investments - Contractual Maturities of Available - For- Sale Debt Securities (Details) $ in Thousands	Jun. 30, 2024 USD ($)
Cash Cash Equivalents And Short Term Investments [Line Items]
Within One Year	$ 219,672
One to Two Years	106,088
Two to Three Years	78,958
Estimated Fair Value	404,718
United States Government-sponsored enterprises
Cash Cash Equivalents And Short Term Investments [Line Items]
Within One Year	66,707
One to Two Years	30,914
Two to Three Years	77,973
Estimated Fair Value	175,594
United States Treasury securities
Cash Cash Equivalents And Short Term Investments [Line Items]
Within One Year	54,404
One to Two Years	34,941
Two to Three Years	985
Estimated Fair Value	90,330
Commercial paper
Cash Cash Equivalents And Short Term Investments [Line Items]
Within One Year	45,469
One to Two Years	0
Two to Three Years	0
Estimated Fair Value	45,469
Corporate debt securities
Cash Cash Equivalents And Short Term Investments [Line Items]
Within One Year	53,092
One to Two Years	40,233
Two to Three Years	0
Estimated Fair Value	$ 93,325

Composition of Certain Financ_3

Composition of Certain Financial Statement Items - Accounts Receivable (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accounts receivable	$ 103,342		$ 110,453
Less: allowance for credit losses	(5,225)	$ (4,923)	(4,898)	$ (4,842)	$ (4,467)	$ (4,327)
Accounts receivable, net	$ 98,117		$ 105,555

Composition of Certain Financ_4

Composition of Certain Financial Statement Items - Reconciliation of Change in Estimated Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Allowance for doubtful accounts
Balance at beginning of the period	$ 4,923	$ 4,467	$ 4,898	$ 4,327
Provision for expected credit losses	1,525	1,372	3,723	2,758
Write-offs and adjustments, net of recoveries	(1,223)	(997)	(3,396)	(2,243)
Balance at end of the period	$ 5,225	$ 4,842	$ 5,225	$ 4,842

Composition of Certain Financ_5

Composition of Certain Financial Statement Items - Inventory (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Raw materials	$ 45,457	$ 42,783
Work-in-process	28,455	44,026
Finished goods	87,749	71,128
Total inventories	$ 161,661	$ 157,937

Fair Value Measurements - Finan

Fair Value Measurements - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available for sale	$ 404,718	$ 409,044
Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents maturity term	3 months	3 months
United States Treasury securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available for sale	$ 90,330	$ 115,004
Commercial paper
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available for sale	45,469	72,511
Corporate debt securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available for sale	93,325	39,375
Fair Value, Measurements, Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	439,231	457,077
Fair Value, Measurements, Recurring \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	124,843	163,037
Fair Value, Measurements, Recurring \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	314,388	294,040
Fair Value, Measurements, Recurring \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	0	0
Fair Value, Measurements, Recurring \| Cash equivalents
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	34,513	48,033
Fair Value, Measurements, Recurring \| Cash equivalents \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	34,513	48,033
Fair Value, Measurements, Recurring \| Cash equivalents \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	0	0
Fair Value, Measurements, Recurring \| Cash equivalents \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	0	0
Fair Value, Measurements, Recurring \| United States Government-sponsored enterprises
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available for sale	175,594	182,154
Fair Value, Measurements, Recurring \| United States Government-sponsored enterprises \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available for sale	0	0
Fair Value, Measurements, Recurring \| United States Government-sponsored enterprises \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available for sale	175,594	182,154
Fair Value, Measurements, Recurring \| United States Government-sponsored enterprises \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available for sale	0	0
Fair Value, Measurements, Recurring \| United States Treasury securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available for sale	90,330	115,004
Fair Value, Measurements, Recurring \| United States Treasury securities \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available for sale	90,330	115,004
Fair Value, Measurements, Recurring \| United States Treasury securities \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available for sale	0	0
Fair Value, Measurements, Recurring \| United States Treasury securities \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available for sale	0	0
Fair Value, Measurements, Recurring \| Commercial paper
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	45,469	72,511
Fair Value, Measurements, Recurring \| Commercial paper \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	0	0
Fair Value, Measurements, Recurring \| Commercial paper \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	45,469	72,511
Fair Value, Measurements, Recurring \| Commercial paper \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	0	0
Fair Value, Measurements, Recurring \| Corporate debt securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available for sale	93,325	39,375
Fair Value, Measurements, Recurring \| Corporate debt securities \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available for sale	0	0
Fair Value, Measurements, Recurring \| Corporate debt securities \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available for sale	93,325	39,375
Fair Value, Measurements, Recurring \| Corporate debt securities \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available for sale	$ 0	0
Fair Value, Measurements, Recurring \| Supranational bonds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available for sale		0
Fair Value, Measurements, Recurring \| Supranational bonds \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available for sale		0
Fair Value, Measurements, Recurring \| Supranational bonds \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available for sale		0
Fair Value, Measurements, Recurring \| Supranational bonds \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available for sale		$ 0

Fair Value Measurements - Estim

Fair Value Measurements - Estimated the Fair Value (Details) - Level 2 - Convertible Senior Notes - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Convertible Senior Notes due 2025
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Convertible senior notes, fair value	$ 39,130	$ 271,688
Convertible Senior Notes due 2029
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Convertible senior notes, fair value	438,701
Convertible Senior Notes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Convertible senior notes, fair value	$ 477,831	$ 271,688

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Details) - USD ($)	Jun. 30, 2024	Mar. 31, 2024	Mar. 08, 2024	Dec. 31, 2023	May 31, 2020
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Repurchased face amount	$ 246,740,000
Convertible Senior Notes Due 2029 \| Convertible Senior Notes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Principal amount:	316,250,000	$ 316,300,000	$ 316,300,000
Convertible Senior Notes due 2025 \| Convertible Senior Notes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Principal amount:	40,760,000			$ 287,500,000	$ 287,500,000
Repurchased face amount	$ 246,700,000	$ 246,700,000

Leases - Additional Information

Leases - Additional Information (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Lessee, Lease, Description [Line Items]
Operating lease cash payments	$ 4.7	$ 4.4
Minimum
Lessee, Lease, Description [Line Items]
Lease term	2 years
Maximum
Lessee, Lease, Description [Line Items]
Lease term	13 years

Leases - Lease Cost (Details)

Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Leases - Lease Cost (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Leases [Abstract]
Operating lease cost	$ 3,564	$ 4,299	$ 7,081	$ 8,774
Short-term lease cost	21	124	43	220
Loss on lease termination and right-of-use asset impairment charges	0	11,224	0	11,224
Total lease cost	$ 3,585	$ 15,647	$ 7,124	$ 20,218

Leases - Future Minimum Payment

Leases - Future Minimum Payments Under Non-cancellable Operating Leases (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Leases [Abstract]
2024	$ 8,874
2025	18,046
2026	17,946
2027	18,229
2028	14,714
Thereafter	90,004
Total undiscounted lease payments	167,813
Less: amount representing interest	(38,631)
Present value of operating lease liabilities	129,182
Less: current portion of operating lease liabilities	(17,790)	$ (17,060)
Operating lease liabilities - long-term	$ 111,392	$ 113,572

Leases - Operating Leases Weigh

Leases - Operating Leases Weighted-Average Remaining Lease Term and Discount Rate (Details)	Jun. 30, 2024	Dec. 31, 2023
Leases [Abstract]
Weighted-average remaining lease term (in years)	9 years 10 months 24 days	10 years 2 months 12 days
Weighted-average discount rate used to determine operating lease liabilities	5.30%	5.40%

Debt - Additional Information (

Debt - Additional Information (Details)			1 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended
Debt - Additional Information (Details)	Mar. 08, 2024 USD ($) trading_day $ / shares	Mar. 05, 2024 USD ($) $ / shares	Mar. 31, 2024 USD ($) $ / shares	May 31, 2020 USD ($) trading_day $ / shares	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
Proceeds from convertible senior notes							$ 306,850,000	$ 0
Repurchased face amount					$ 246,740,000		246,740,000
Loss on extinguishment of debt					0	$ 0	1,268,000	0
Net proceeds to repurchase of common shares							30,000,000
Convertible Senior Notes Due 2029 \| Convertible Senior Notes
Debt Instrument [Line Items]
Principal amount	$ 316,300,000		$ 316,300,000		316,250,000		316,250,000
Interest rate	1.50%
Net proceeds from issuance of convertible notes	$ 306,800,000
Proceeds from convertible senior notes	246,100,000
Net proceeds to repurchase of common shares	30,000,000
Average cost per share (in dollars per share) \| $ / shares		$ 27.105
Net proceeds to pay for capped call transactions	$ 15,800,000
Debt instrument, convertible, conversion ratio	0.0289361
Conversion price (in dollars per share) \| $ / shares	$ 34.56
Debt instrument, convertible, threshold trading days \| trading_day	20
Debt instrument, convertible, threshold trading days consecutive trading days \| trading_day	30
Redemption price percentage	100%
Principal amount							52,400,000
Capped call transactions net cost			$ 15,800,000
Debt instrument, initial cap price per share (in dollars per share) \| $ / shares			$ 42.0128
Convertible Senior Notes Due 2029 \| Convertible Senior Notes \| Conversion Instance, 130%
Debt Instrument [Line Items]
Debt instrument, convertible, threshold trading days \| trading_day	20
Debt instrument, convertible, threshold trading days consecutive trading days \| trading_day	30
Convertible Senior Notes Due 2029 \| Convertible Senior Notes \| Conversion Instance, 98%
Debt Instrument [Line Items]
Debt instrument, convertible, threshold trading days \| trading_day	5
Debt instrument, convertible, threshold trading days consecutive trading days \| trading_day	10
Convertible Senior Notes Due 2029 \| Convertible Senior Notes \| Minimum
Debt Instrument [Line Items]
Debt instrument, convertible, threshold percentage of stock price trigger	130%
Convertible Senior Notes Due 2029 \| Convertible Senior Notes \| Minimum \| Conversion Instance, 130%
Debt Instrument [Line Items]
Debt instrument, convertible, threshold percentage of stock price trigger	130%
Convertible Senior Notes Due 2029 \| Convertible Senior Notes \| Minimum \| Conversion Instance, 98%
Debt Instrument [Line Items]
Debt instrument, convertible, threshold percentage of stock price trigger	98%
Convertible Senior Notes Due 2025 \| Convertible Senior Notes
Debt Instrument [Line Items]
Principal amount				$ 287,500,000	40,760,000		40,760,000		$ 287,500,000
Interest rate				1.50%
Net proceeds from issuance of convertible notes				$ 244,600,000
Repurchased face amount			$ 246,700,000		$ 246,700,000		246,700,000
Interest expense	$ 1,300,000
Loss on extinguishment of debt							1,300,000
Debt instrument, convertible, conversion ratio				0.0088836
Conversion price (in dollars per share) \| $ / shares				$ 112.57
Debt instrument, convertible, threshold trading days \| trading_day				20
Debt instrument, convertible, threshold trading days consecutive trading days \| trading_day				30
Redemption price percentage				100%
Principal amount							$ 0		$ 0
Capped call transactions net cost				$ 34,100,000
Debt instrument, initial cap price per share (in dollars per share) \| $ / shares				$ 173.18
Proceeds from capped call termination		$ 200,000
Convertible Senior Notes Due 2025 \| Convertible Senior Notes \| Conversion Instance, 130%
Debt Instrument [Line Items]
Debt instrument, convertible, threshold trading days \| trading_day				20
Debt instrument, convertible, threshold trading days consecutive trading days \| trading_day				30
Convertible Senior Notes Due 2025 \| Convertible Senior Notes \| Conversion Instance, 98%
Debt Instrument [Line Items]
Debt instrument, convertible, threshold trading days \| trading_day				5
Debt instrument, convertible, threshold trading days consecutive trading days \| trading_day				5
Convertible Senior Notes Due 2025 \| Convertible Senior Notes \| Minimum
Debt Instrument [Line Items]
Debt instrument, convertible, threshold percentage of stock price trigger				130%
Convertible Senior Notes Due 2025 \| Convertible Senior Notes \| Minimum \| Conversion Instance, 130%
Debt Instrument [Line Items]
Debt instrument, convertible, threshold percentage of stock price trigger				130%
Convertible Senior Notes Due 2025 \| Convertible Senior Notes \| Minimum \| Conversion Instance, 98%
Debt Instrument [Line Items]
Debt instrument, convertible, threshold percentage of stock price trigger				98%

Debt - Components of Convertibl

Debt - Components of Convertible Note (Details) - USD ($)	Jun. 30, 2024	Mar. 31, 2024	Mar. 08, 2024	Dec. 31, 2023	May 31, 2020
Debt Instrument [Line Items]
Unamortized debt issuance costs	$ (9,400,000)
Less: current portion	(40,540,000)			$ 0
Long-term senior convertible notes	307,392,000			285,035,000
Convertible Senior Notes \| Convertible Senior Notes Due 2025
Debt Instrument [Line Items]
Principal amount:	40,760,000			287,500,000	$ 287,500,000
Convertible Senior Notes \| Convertible Senior Notes Due 2029
Debt Instrument [Line Items]
Principal amount:	316,250,000	$ 316,300,000	$ 316,300,000
Convertible Senior Notes \| Convertible Senior Notes
Debt Instrument [Line Items]
Principal amount:	357,010,000			287,500,000
Unamortized debt issuance costs	(9,078,000)			(2,465,000)
Total debt, net	$ 347,932,000			$ 285,035,000

Debt - Effective Interest Rates

Debt - Effective Interest Rates of Convertible Senior Notes (Details) - Convertible Senior Notes	Jun. 30, 2024	Jun. 30, 2023
Convertible Senior Notes Due 2025
Debt Instrument [Line Items]
Effective interest rate	2.20%	2.20%
Convertible Senior Notes Due 2029
Debt Instrument [Line Items]
Effective interest rate	2.10%

Debt - Interest Expense Recogni

Debt - Interest Expense Recognized (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Debt Instrument [Line Items]
Amortization of debt issuance costs			$ 1,085	$ 1,009
Convertible Senior Notes \| Convertible Senior Notes
Debt Instrument [Line Items]
Contractual interest expense	$ 1,339	$ 1,078	2,484	2,156
Amortization of debt issuance costs	435	450	902	897
Total interest expense	$ 1,774	$ 1,528	$ 3,386	$ 3,053

Stockholders' Equity -Shares of

Stockholders' Equity -Shares of Common Stock Reserved for Future Issuance (Details) - shares	Jun. 30, 2024	May 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares)	22,625,000	2,602,184
Shares reserved for issuance upon conversion of Convertible Senior Notes
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares)	9,513,000
Shares underlying outstanding warrants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares)	194,000
Shares underlying outstanding stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares)	3,711,000
Shares underlying unvested restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares)	4,260,000
Shares authorized for issuance pursuant to awards granted under the ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares)	3,052,000
Shares authorized for future equity award grants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares)	1,895,000

Stockholders' Equity - Common S

Stockholders' Equity - Common Stock Warrants (Details) - Common Stock Warrant Expiring March 2027	Jun. 30, 2024 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants exercise price (in dollars per share) \| $ / shares	$ 23.50
Warrants outstanding (in shares) \| shares	193,788

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Details) - USD ($) $ in Millions	1 Months Ended	6 Months Ended	12 Months Ended
	May 31, 2024	Jun. 30, 2024	Dec. 31, 2023	May 31, 2023
Equity [Abstract]
Number of shares issued by each warrant (in shares)		1
Common stock reserved for future issuance (in shares)		22,625,000		2,602,184
Increase in common stock reserve for issuance (in shares)	3,000,000
Total stock-based compensation expense capitalized as part of cost of inventory		$ 1.6	$ 2

Stockholders' Equity - Allocati

Stockholders' Equity - Allocation of Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 24,897	$ 23,401	$ 46,936	$ 44,594
Cost of sales
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	1,760	1,749	3,830	3,343
Selling, general and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	15,518	14,871	28,807	28,982
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 7,619	$ 6,781	$ 14,299	$ 12,269

Stockholders' Equity - Restrict

Stockholders' Equity - Restricted Stock Units (RSUs) (Details) - Restricted Stock Units (RSUs) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
RSU granted (in shares)	1,694,239	1,635,679	2,052,298	1,789,825
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted average grant date fair value (in dollars per share)	$ 48.30	$ 27.61	$ 44.30	$ 28.92

Stockholders' Equity - Assumpti

Stockholders' Equity - Assumptions Used in Black-Scholes Option-Pricing Model (Details) - Awards to be granted under the ESPP - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value (in dollars per share)	$ 21.45	$ 12.52	$ 21.45	$ 12.52
Risk-free interest rate	5.10%	4.70%	5.10%	4.70%
Dividend yield	0%	0%	0%	0%
Expected volatility	70.20%	60.90%	70.20%	60.90%
Expected term (in years)	1 year 3 months 18 days	1 year 3 months 18 days	1 year 3 months 18 days	1 year 3 months 18 days

Employee Benefits (Details)

Employee Benefits (Details)	6 Months Ended
Employee Benefits (Details)	Jun. 30, 2024
Retirement Benefits [Abstract]
Minimum age of employees for defined contribution plan	18 years

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Income Taxes (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Income Tax Disclosure [Abstract]
Income tax expense	$ 1,071	$ 1,146	$ 4,257	$ 1,433
Income (loss) before taxes	$ (29,743)	$ (34,629)	$ (69,272)	$ (158,215)

Business Segment and Geograph_3

Business Segment and Geographic Information - Additional Information (Details) - segment	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenue, Major Customer [Line Items]
Number of operating segments			1
United States \| Revenue from Contract with Customer Benchmark \| Customer Concentration Risk
Revenue, Major Customer [Line Items]
Customers accounted for 10% or more	63%	64%	62%	65%

Business Segment and Geograph_4

Business Segment and Geographic Information - Geographical Markets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Total Sales	$ 221,910	$ 195,917	$ 413,584	$ 365,300
United States
Disaggregation of Revenue [Line Items]
Total Sales	156,711	142,501	286,472	273,743
Outside the United States
Disaggregation of Revenue [Line Items]
Total Sales	$ 65,199	$ 53,416	$ 127,112	$ 91,557

Business Segment and Geograph_5

Business Segment and Geographic Information - Revenues by Product (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Total Sales	$ 221,910	$ 195,917	$ 413,584	$ 365,300
Pump
Disaggregation of Revenue [Line Items]
Total Sales	107,875	101,677	195,162	186,379
Supplies and other
Disaggregation of Revenue [Line Items]
Total Sales	113,881	96,549	219,414	183,253
Net revenue recognized (deferred) for Tandem Choice program
Disaggregation of Revenue [Line Items]
Total Sales	$ 154	$ (2,309)	$ (992)	$ (4,332)

Acquisitions (Details)

Acquisitions (Details) $ in Thousands, SFr in Millions			3 Months Ended		6 Months Ended
Acquisitions (Details) $ in Thousands, SFr in Millions	Jan. 19, 2023 USD ($)	Jan. 19, 2023 CHF (SFr)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Sep. 30, 2022 CHF (SFr)
Business Acquisition [Line Items]
Equity securities without readily determinable fair value, amount							SFr 8
Acquired in-process research and development expenses \| $			$ 0	$ 0	$ 0	$ 78,750
AMF Medical Acquisition
Business Acquisition [Line Items]
Payments of cash		SFr 62.4
Additional earnout payment		SFr 129.6
Milestone period	2 years	2 years
Acquired in-process research and development expenses \| $	$ 78,800
AMF Medical Acquisition \| Development Milestones
Business Acquisition [Line Items]
Additional earnout payment		SFr 38.4
AMF Medical Acquisition \| Regulatory Clearance Milestone
Business Acquisition [Line Items]
Additional earnout payment		SFr 91.2

Commitments and Contingencies (

Commitments and Contingencies (Details) $ in Millions	1 Months Ended
Commitments and Contingencies (Details) $ in Millions	Apr. 23, 2024 lawsuit	Jun. 30, 2024 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Number of lawsuits \| lawsuit	2
Unsecured letter of credit outstanding \| $		$ 4.9