Applied Optoelectronics (AAOI) 10-Q9 Nov 232023 Q3 Quarterly reportFinancial data

Company Profile

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
Document And Entity Information - shares	Sep. 30, 2023	Nov. 06, 2023
Document Information [Line Items]
Entity Central Index Key	0001158114
Entity Registrant Name	APPLIED OPTOELECTRONICS, INC.
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2023
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2023
Document Transition Report	false
Entity File Number	001-36083
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	76-0533927
Entity Address, Address Line One	13139 Jess Pirtle Blvd.
Entity Address, City or Town	Sugar Land
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77478
City Area Code	281
Local Phone Number	295-1800
Title of 12(b) Security	Common Stock, Par value $0.001
Trading Symbol	AAOI
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		35,536,578

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current Assets
Cash and cash equivalents	$ 21,940	$ 24,685
Restricted cash	9,301	10,902
Accounts receivable - trade, net of allowance of $1 and $28, respectively	60,751	61,175
Notes receivable	0	339
Inventories	67,533	79,679
Prepaid income tax	2	0
Prepaid expenses and other current assets	4,871	6,384
Total current assets	164,398	183,164
Property, plant and equipment, net	193,828	210,184
Land use rights, net	4,992	5,238
Operating right of use asset	4,992	5,566
Financing right of use asset	3	26
Intangible assets, net	3,626	3,699
Other assets, net	1,953	386
TOTAL ASSETS	373,792	408,263
Current liabilities
Accounts payable	34,854	47,845
Bank acceptance payable	14,383	12,337
Accrued liabilities	16,383	17,222
Unearned revenue	10,073	3,000
Current lease liability - operating	1,059	1,041
Current lease liability - financing	49	63
Current portion of notes payable and long-term debt	31,323	57,074
Current portion of Convertible senior notes	80,124	0
Total current liabilities	188,248	138,582
Unearned revenue, Net of Current portion	2,424	0
Non-current lease liability - operating	4,767	5,505
Convertible senior notes	0	79,506
TOTAL LIABILITIES	195,439	223,593
Stockholders' equity:
Common Stock; 80,000 shares authorized at $0.001 par value; 34,266 and 28,622 shares issued and outstanding at September 30, 2023 and December 31, 2022, respectively	34	29
Additional paid-in capital	431,766	391,526
Accumulated other comprehensive income	(2,188)	2,183
Accumulated deficit	(251,259)	(209,068)
TOTAL STOCKHOLDERS' EQUITY	178,353	184,670
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 373,792	$ 408,263

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) shares in Thousands, $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Accounts receivable, allowance	$ 1	$ 28
Common stock, shares authorized (in shares)	80,000	80,000
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares issued (in shares)	34,266	28,622
Common stock, shares outstanding (in shares)	34,266	28,622

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenue, net	$ 62,547	$ 56,693	$ 157,193	$ 161,233
Cost of goods sold	42,373	46,944	119,876	133,832
Gross profit	20,174	9,749	37,317	27,401
Operating expenses
Research and development	9,457	9,206	26,633	27,021
Sales and marketing	3,035	2,385	7,631	7,107
General and administrative	14,368	11,654	39,870	33,908
Total operating expenses	26,860	23,245	74,134	68,036
Loss from operations	(6,686)	(13,496)	(36,817)	(40,635)
Other income (expense)
Interest income	65	31	133	90
Interest expense	(1,989)	(1,621)	(6,301)	(4,431)
Other expense, net	(343)	(541)	803	(1,171)
Total other income (expense), net	(2,267)	(2,131)	(5,365)	(5,512)
Loss before income taxes	(8,953)	(15,627)	(42,182)	(46,147)
Income tax expense	0	0	(8)	0
Net loss	$ (8,953)	$ (15,627)	$ (42,190)	$ (46,147)
Net loss per share
Basic (in dollars per share)	$ (0.27)	$ (0.56)	$ (1.39)	$ (1.67)
Diluted (in dollars per share)	$ (0.27)	$ (0.56)	$ (1.39)	$ (1.67)
Weighted average shares used to compute net loss per share:
Basic (in shares)	32,774,148	27,839,245	30,392,483	27,639,671
Diluted (in shares)	32,774,148	27,839,245	30,392,483	27,639,671

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Net loss	$ (8,953)	$ (15,627)	$ (42,190)	$ (46,147)
Loss on foreign currency translation adjustment	(718)	(8,214)	(4,371)	(17,059)
Comprehensive loss	$ (9,671)	$ (23,841)	$ (46,561)	$ (63,206)

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2021	0	27,323
Balance at Dec. 31, 2021	$ 0	$ 27	$ 381,143	$ 16,071	$ (142,671)	$ 254,570
Issuance of restricted stock, net of shares withheld for employee tax (in shares)	0	641
Issuance of restricted stock, net of shares withheld for employee tax	$ 0	$ 1	(339)	0	0	(338)
Share-based compensation	$ 0	$ 0	7,243	0	0	7,243
Public offering of common stock, net (in shares)	0	94
Public offering of common stock, net	$ 0	$ 0	269	0	0	269
Foreign currency translation adjustment	0	0	0	(17,059)	0	(17,059)
Net loss	$ 0	$ 0	0	0	(46,147)	(46,147)
Balance (in shares) at Sep. 30, 2022	0	28,058
Balance at Sep. 30, 2022	$ 0	$ 28	388,316	(988)	(188,818)	198,538
Balance (in shares) at Jun. 30, 2022	0	27,658
Balance at Jun. 30, 2022	$ 0	$ 28	385,531	7,226	(173,191)	219,594
Issuance of restricted stock, net of shares withheld for employee tax (in shares)	0	306
Issuance of restricted stock, net of shares withheld for employee tax	$ 0	$ 0	(111)	0	0	(111)
Share-based compensation	$ 0	$ 0	2,627	0	0	2,627
Public offering of common stock, net (in shares)	0	94
Public offering of common stock, net	$ 0	$ 0	269	0	0	269
Foreign currency translation adjustment	0	0	0	(8,214)	0	(8,214)
Net loss	$ 0	$ 0	0	0	(15,627)	(15,627)
Balance (in shares) at Sep. 30, 2022	0	28,058
Balance at Sep. 30, 2022	$ 0	$ 28	388,316	(988)	(188,818)	198,538
Balance (in shares) at Dec. 31, 2022	0	28,623
Balance at Dec. 31, 2022	$ 0	$ 29	391,526	2,183	(209,068)	$ 184,670
Stock options exercised, net of shares withheld for employee tax (in shares)	0	32				32
Stock options exercised, net of shares withheld for employee tax	$ 0	$ 0	(13)	0	0	$ (13)
Issuance of restricted stock, net of shares withheld for employee tax (in shares)	0	914
Issuance of restricted stock, net of shares withheld for employee tax	$ 0	$ 1	(641)	0	0	(640)
Share-based compensation	$ 0	$ 0	8,587	0	0	8,587
Public offering of common stock, net (in shares)	0	4,697
Public offering of common stock, net	$ 0	$ 4	32,307	0	0	32,311
Foreign currency translation adjustment	0	0	0	(4,371)	(1)	(4,372)
Net loss	$ 0	$ 0	0	0	(42,190)	(42,190)
Balance (in shares) at Sep. 30, 2023	0	34,266
Balance at Sep. 30, 2023	$ 0	$ 34	431,766	(2,188)	(251,259)	178,353
Balance (in shares) at Jun. 30, 2023	0	31,785
Balance at Jun. 30, 2023	$ 0	$ 32	407,003	(1,470)	(242,306)	163,259
Stock options exercised, net of shares withheld for employee tax (in shares)	0	32
Stock options exercised, net of shares withheld for employee tax	$ 0	$ 0	(13)	0	0	(13)
Issuance of restricted stock, net of shares withheld for employee tax (in shares)	0	407
Issuance of restricted stock, net of shares withheld for employee tax	$ 0	$ 0	(482)	0	0	(482)
Share-based compensation	$ 0	$ 0	3,235	0	0	3,235
Public offering of common stock, net (in shares)	0	2,042
Public offering of common stock, net	$ 0	$ 2	22,023	0	0	22,025
Foreign currency translation adjustment	0	0	0	(718)	0	(718)
Net loss	$ 0	$ 0	0	0	(8,953)	(8,953)
Balance (in shares) at Sep. 30, 2023	0	34,266
Balance at Sep. 30, 2023	$ 0	$ 34	$ 431,766	$ (2,188)	$ (251,259)	$ 178,353

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Operating activities:
Net loss	$ (42,190)	$ (46,147)
Adjustments to reconcile net loss to net cash used in operating activities:
Allowance of bad debt	(27)	(8)
Inventory reserve adjustment	7,454	3,852
Depreciation and amortization	15,499	17,698
Amortization of debt issuance costs	928	641
Loss (gain) on disposal of assets	2	(34)
Share-based compensation	8,587	7,243
Unrealized foreign exchange (gain) loss	(583)	2,443
Changes in operating assets and liabilities:
Accounts receivable, trade	450	2,258
Trade Notes receivable	301	8,089
Prepaid income tax	(2)	1
Inventories	2,917	(12,734)
Other current assets	1,384	(2,251)
Operating right of use asset	345	665
Accounts payable	(12,992)	10,781
Accrued liabilities	(600)	(2,312)
Accrued Income Tax	(1)	0
Unearned revenue	9,497	0
Lease liability	(448)	(724)
Net cash used in operating activities	(9,479)	(10,539)
Investing activities:
Purchase of property, plant and equipment	(2,915)	(2,450)
Proceeds from disposal of equipment	131	118
Deposits and prepaid for equipment	(1,948)	(488)
Purchase of intangible assets	(426)	(390)
Net cash used in investing activities	(5,158)	(3,210)
Financing activities:
Principal payments of long-term debt and notes payable	0	(7,336)
Proceeds from line of credit borrowings	47,047	103,505
Repayments of line of credit borrowings	(71,834)	(97,298)
Proceeds from bank acceptance payable	42,118	33,891
Repayments of bank acceptance payable	(39,699)	(27,062)
Principal payments of financing lease	(15)	(14)
Exercise of stock options	(13)	0
Payments of tax withholding on behalf of employees related to share-based compensation	(640)	(337)
Proceeds from common stock offering, net	32,312	238
Net cash provided by financing activities	9,276	5,587
Effect of exchange rate changes on cash	1,015	1,601
Net decrease in cash, cash equivalents and restricted cash	(4,346)	(6,561)
Cash, cash equivalents and restricted cash at beginning of period	35,587	41,136
Cash, cash equivalents and restricted cash at end of period	31,241	34,575
Supplemental disclosure of cash flow information:
Interest, net of amounts capitalized	6,054	4,861
Income taxes	10	0
Non-cash investing and financing activities:
Net change in accounts payable related to property and equipment additions	(12)	(192)
Net change in deposits and prepaid for equipment related to property and equipment additions	$ (473)	$ 52

Note 1 - Description of Busines

Note 1 - Description of Business	9 Months Ended
Note 1 - Description of Business	Sep. 30, 2023
Notes to Financial Statements
Business Description and Basis of Presentation [Text Block]	Note 1. Business Overview Applied Optoelectronics, Inc. ("AOI" or the 'Company") is a Delaware corporation. The Company is a leading, vertically integrated provider of fiber-optic networking products, primarily for four The Company has manufacturing and research and development facilities located in the U.S., Taiwan and China. In the U.S., at its corporate headquarters and manufacturing facilities in Sugar Land, Texas, the Company primarily manufactures lasers and laser components and performs research and development activities for laser component and optical module products. In addition, the Company also has a research and development facility in Duluth, Georgia. The Company operates in Taipei, Taiwan and Ningbo, China through its wholly-owned subsidiary Prime World International Holdings, Ltd. ("Prime World", incorporated in the British Virgin Islands). Prime World operates a branch in Taipei, Taiwan, which primarily manufactures transceivers and performs research and development activities for the transceiver products. Prime World is also the parent of Global Technology, Inc. ("Global", incorporated in the People’s Republic of China). Through Global, the Company primarily manufactures certain of its data center transceiver products, including subassemblies, as well as CATV systems and equipment, and performs research and development activities for the CATV products. Interim Financial Statements The unaudited condensed consolidated financial statements of the Company as of September 30, 2023 December 31, 2022 three nine September 30, 2023 September 30, 2022 10 10 01 X 10 December 31, 2022 three nine September 30, 2023 not Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported. Actual results could differ from those estimates in the consolidated financial statement s and accompanying notes. Significant estimates and assumptions that impact these financial statements and the accompanying notes relate to, among other things, allowance for doubtful accounts, inventory reserve, impairment of long-lived assets, service and product warranty costs, share-based compensation expense, estimated useful lives of property and equipment, and taxes. Termination of the Divestiture Agreement with Yuhan Optoelectronic Technology (Shanghai) Co., Ltd On September 15, 2022, September 12, 2023,

Note 2 - Significant Accounting

Note 2 - Significant Accounting Policies	9 Months Ended
Note 2 - Significant Accounting Policies	Sep. 30, 2023
Notes to Financial Statements
Significant Accounting Policies [Text Block]	Note 2. There have been no three nine September 30, 2023 2022 Recent Accounting Pronouncements Recent Accounting Pronouncements Yet to be Adopted To date, there have been no not

Note 3 - Revenue Recognition

Note 3 - Revenue Recognition	9 Months Ended
Note 3 - Revenue Recognition	Sep. 30, 2023
Notes to Financial Statements
Revenue from Contract with Customer [Text Block]	Note 3. Disaggregation of Revenue Revenue is classified based on the location where the product is manufactured. For additional information on the disaggregated revenues by geographical region, see Note 17, Revenue is also classified by major product category and is presented below (in thousands): Three months ended September 30, % of % of 2023 Revenue 2022 Revenue CATV $ 10,268 16.4 % $ 31,260 55.2 % Data Center 48,807 78.0 % 17,697 31.2 % Telecom 3,074 5.0 % 6,821 12.0 % FTTH — 0.0 % — 0.0 % Other 398 0.6 % 915 1.6 % Total Revenue $ 62,547 100.0 % $ 56,693 100.0 % Nine months ended September 30, % of % of 2023 Revenue 2022 Revenue CATV $ 47,391 30.1 % $ 79,953 49.6 % Data Center 96,731 61.5 % 60,608 37.5 % Telecom 11,013 7.0 % 18,362 11.4 % FTTH 57 0.1 % 124 0.1 % Other 2,001 1.3 % 2,186 1.4 % Total Revenue $ 157,193 100.0 % $ 161,233 100.0 % Unearned Revenue We record unearned revenues when cash payments are received or due in advance of our performance, including amounts which are refundable. Unearned revenues solely relate to statement of work with Microsoft regarding contract prices allocated to the performance obligations that are unsatisfied, or partially unsatisfied, as of the balance sheet date. Unearned revenue balance as of September 30, 2023 December 31, 2022 three September 30, 2023 2022 s $1.9 million nine September 30, 2023 2022 s $3.1 million

Note 4 - Leases

Note 4 - Leases	9 Months Ended
Note 4 - Leases	Sep. 30, 2023
Notes to Financial Statements
Lessee, Operating and Finance Leases [Text Block]	Note 4. The Company leases space under non-cancellable operating leases for manufacturing facilities, research and development offices and certain storage facilities and apartments. These leases do not one one As most of the Company’s leases do not Lease expense is included under general and administrative expenses and was $0.3 million for the three September 30, 2023 2022, nine September 30, 2023 nine September 30, 2022 . Th e components of lease expense were as follows for the periods indicated ( in thousands): Three months ended September 30, Nine months ended September 30, 2023 2022 2023 2022 Operating lease expense $ 287 $ 283 $ 849 $ 882 Financing lease expense 8 8 24 24 Short Term lease expense 3 34 9 55 Total lease expense $ 298 $ 325 $ 882 $ 961 Maturities of lease liabilities are as follows for the future one September 30, 2023 Operating Financing 2024 $ 1,241 $ 49 2025 1,248 — 2026 1,110 — 2027 1,028 — 2028 1,038 — 2029 and thereafter 699 — Total lease payments 6,364 49 Less imputed interest (538 ) — Present value $ 5,826 $ 49 The weighted average remaining lease term and discount rate for the leases were as follows for the periods indicated: Nine months ended September 30, 2023 2022 Weighted Average Remaining Lease Term (Years) - operating leases 5.33 6.41 Weighted Average Remaining Lease Term (Years) - financing leases 0.08 1.08 Weighted Average Discount Rate - operating leases 3.28 % 3.22 % Weighted Average Discount Rate - financing leases 5.00 % 5.00 % Supplemental cash flow information related to the leases was as follows for the periods indicated (in thousands): Nine months ended September 30, 2023 2022 Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases $ 934 $ 903 Operating cash flows from financing lease 3 3 Financing cash flows from financing lease 15 14

Note 5 - Cash, Cash Equivalents

Note 5 - Cash, Cash Equivalents and Restricted Cash	9 Months Ended
Note 5 - Cash, Cash Equivalents and Restricted Cash	Sep. 30, 2023
Notes to Financial Statements
Cash and Cash Equivalents Disclosure [Text Block]	Note 5. The following table provides a reconciliation of c ash, cash equivalents and r September 30, December 31, 2023 2022 Cash and cash equivalents $ 21,940 $ 24,685 Restricted cash 9,301 10,902 Total cash, cash equivalents and restricted cash shown in the statement of cash flows $ 31,241 $ 35,587 Restricted cash includes guarantee deposits for customs duties, China government subsidy fund, and compensating balances associated with certain credit facilities. As of September 30, 2023 December 31, 2022 September 30, 2023 December 31, 2022 September 30, 2023 December 31, 2022

Note 6 - Earnings (Loss) Per Sh

Note 6 - Earnings (Loss) Per Share	9 Months Ended
Note 6 - Earnings (Loss) Per Share	Sep. 30, 2023
Notes to Financial Statements
Earnings Per Share [Text Block]	Note 6. Basic net loss per share has been computed using the weighted-average number of shares of common stock outstanding during the period. Diluted net loss per share has been computed using the weighted-average number of shares of common stock and dilutive potential common shares from stock options, restricted stock units and senior convertible notes outstanding during the period. In periods with net losses, normally dilutive shares become anti-dilutive. Therefore, basic and diluted loss per share are the same. The following table sets forth the computation of the basic and diluted net loss per share for the periods indicated (in thousands): Three months ended September 30, Nine months ended September 30, 2023 2022 2023 2022 Numerator: Net loss $ (8,953 ) $ (15,627 ) $ (42,190 ) $ (46,147 ) Denominator: Weighted average shares used to compute net loss per share Basic 32,774 27,839 30,392 27,640 Diluted 32,774 27,839 30,392 27,640 Net loss per share Basic $ (0.27 ) $ (0.56 ) $ (1.39 ) $ (1.67 ) Diluted $ (0.27 ) $ (0.56 ) $ (1.39 ) $ (1.67 ) The following potentially dilutive securities were excluded from the diluted net loss per share as their effect would have been antidilutive (in thousands): Three months ended September 30, Nine months ended September 30, 2023 2022 2023 2022 Employee stock options 8 — — — Restricted stock units 2,650 322 973 — Shares for convertible senior notes 4,587 4,587 4,587 4,587 Total antidilutive shares 7,245 4,909 5,560 4,587

Note 7 - Inventories

Note 7 - Inventories	9 Months Ended
Note 7 - Inventories	Sep. 30, 2023
Notes to Financial Statements
Inventory Disclosure [Text Block]	Note 7. Inventories, net of inventory write-downs, consist of the following for the periods indicated (in thousands): September 30, 2023 December 31, 2022 Raw materials $ 26,566 $ 25,732 Work in process and sub-assemblies 32,838 39,563 Finished goods 8,129 14,384 Total inventories $ 67,533 $ 79,679 For the three September 30, 2023 2022 nine September 30, 2023 2022 For the three September 30, 2023 2022 nine September 30, 2023 2022

Note 8 - Property, Plant and Eq

Note 8 - Property, Plant and Equipment	9 Months Ended
Note 8 - Property, Plant and Equipment	Sep. 30, 2023
Notes to Financial Statements
Property, Plant and Equipment Disclosure [Text Block]	Note 8. Property, plant and equipment consisted of the following for the periods indicated (in thousands): September 30, 2023 December 31, 2022 Land improvements $ 806 $ 806 Buildings and improvements 85,006 86,372 Machinery and equipment 245,802 251,216 Furniture and fixtures 5,309 5,382 Computer equipment and software 11,449 11,713 Transportation equipment 653 679 349,025 356,168 Less accumulated depreciation and amortization (185,824 ) (177,519 ) 163,201 178,649 Construction in progress 29,526 30,434 Land 1,101 1,101 Total property, plant and equipment, net $ 193,828 $ 210,184 For the three September 30, 2023 2022 s $4.8 million nine September 30, 2023 2022 s $15 million three September 30, 2023 2022 As of September 30, 2023 , the Company concluded that its continued loss history constitutes a triggering event as described in ASC 360 - 10 - 35 - 21, Property, Plant, and Equipment . The Company performed a recoverability test and concluded that future undiscounted cash flows exceed the carrying amount of the Company’s long-lived assets and therefore no impairment charge was recorded.

Note 9 - Intangible Assets, Net

Note 9 - Intangible Assets, Net	9 Months Ended
Note 9 - Intangible Assets, Net	Sep. 30, 2023
Notes to Financial Statements
Intangible Assets Disclosure [Text Block]	Note 9. Intangible assets consisted of the following for the periods indicated (in thousands): September 30, 2023 Gross Accumulated Intangible Amount amortization assets, net Patents $ 9,363 $ (5,805 ) $ 3,558 Trademarks 95 (27 ) 68 Total intangible assets $ 9,458 $ (5,832 ) $ 3,626 December 31, 2022 Gross Accumulated Intangible Amount amortization assets, net Patents $ 8,994 $ (5,330 ) $ 3,664 Trademarks 56 (21 ) 35 Total intangible assets $ 9,050 $ (5,351 ) $ 3,699 For the three September 30, 2023 2022 nine September 30, 2023 2022 mately 5.4 years. At September 30, 2023 one 2024 $ 668 2025 668 2026 668 2027 668 2028 668 2029 and thereafter 286 $ 3,626

Note 10 - Fair Value of Financi

Note 10 - Fair Value of Financial Instruments	9 Months Ended
Note 10 - Fair Value of Financial Instruments	Sep. 30, 2023
Notes to Financial Statements
Fair Value Disclosures [Text Block]	Note 10. The carrying value amounts of cash and cash equivalents, restricted cash, accounts receivable, prepaid expenses, notes receivable and other current assets, accounts payable, accrued expenses, bank acceptance payable and other current liabilities approximate fair value because of the short-term maturity of these instruments. The Company believes that the interest rates in effect at each period end represent the current market rates for similar borrowings. The fair value of convertible senior notes is measured for disclosure purposes only. The fair value and carrying amount of our convertible senior notes as of September 30, 2023 December 31, 2022, 2

Note 11 - Notes Payable and Lon

Note 11 - Notes Payable and Long-term Debt	9 Months Ended
Note 11 - Notes Payable and Long-term Debt	Sep. 30, 2023
Notes to Financial Statements
Debt Disclosure [Text Block]	Note 11. Notes payable and long-term debt consisted of the following for the periods indicated (in thousands): September 30, 2023 December 31, 2022 Revolving line of credit with a U.S. bank up to $ 27.780 9.190 12/14/2023 11/16/2025 — $ 25,000 Revolving line of credit with a China bank up to $ 19.04 4.57 6.12 May 24, 2024 13,413 13,102 Credit facility with a China bank up to $ 26.65 4.45 6.6 June 6, 2027 18,802 20,140 Credit facility with a China bank up to $ 728 2.7 November 23, 2023 — — Sub-total 32,215 58,242 Less debt issuance costs, net (892 ) (1,168 ) Grand total 31,323 57,074 Less current portion (31,323 ) (57,074 ) Non-current portion $ — $ — Bank Acceptance Notes Payable Bank acceptance notes issued to vendors with a zero percent interest rate $ 14,383 $ 12,337 The current portion of long-term debt is the amount payable within one September 30, 2023 Maturities of long-term debt are as follows for the future one September 30, 2023 Within one year $ 31,323 Beyond one year — Total outstanding $ 31,323 On November 16, 2022, three 50% November 16, 2025 91 September 30, 2023 August 16, 2023, November 17, 2023. On May 24, 2019, five may 5 may September 30, 2023 $13.4 $10.8 On June 7, 2022, five "¥200M may ¥200M June 7, 2022 June 6, 2027 ( "¥200M ¥200M may ¥200M ¥200M may ¥200M September 30, 2023 ¥200M $3.6 As of September 30, 2023 and December 31, 2022 , the Company had $42.2 million of unused borrowing capacity, respectively. As of September 30, 2023 December 31, 2022 was $9.3 million and $9.9 million of restricted cash, investme

Note 12 - Convertible Senior No

Note 12 - Convertible Senior Notes	9 Months Ended
Note 12 - Convertible Senior Notes	Sep. 30, 2023
Notes to Financial Statements
Convertible Debt [Text Block]	Note 12. On March 5, 2019, 2024 March 5, 2019 5.00% March 15 September 15 September 15, 2019. March 15, 2024, The sale of the Notes generated net proceeds of $76.4 million, after deducting the Initial Purchasers’ discounts and offering expenses payable by the Company. The Company used approximately $37.8 million of the net proceeds from the offering to fully repay the CapEx Loan and Term Loan with Truist Bank and the remainder will be used for general corporate purposes. The following table presents the carrying value of the Notes for the periods indicated (in thousands): September 30, December 31, 2023 2022 Principal $ 80,500 $ 80,500 Unamortized debt issuance costs (376 ) (994 ) Net carrying amount $ 80,124 $ 79,506 The Notes are convertible at the option of holders of the Notes at any time until the close of business on the scheduled trading day immediately preceding the maturity date. Upon conversion, holders of the Notes will receive shares of the Company’s common stock, together, if applicable, with cash in lieu of any fractional share, at the then-applicable conversion rate. The initial conversion rate is 56.9801 shares of the Company’s common stock per $1,000 principal amount of Notes (representing an initial conversion price of approximately $17.55 per share of common stock, which represents an initial conversion premium of approximately 30% above the closing price of $13.50 per share of the Company’s common stock on February 28, 2019 March 15, 2022, Initially and as of September 30, 2023 no Holders may After March 15, 2022, may not The Indenture contains covenants that limit the Company’s ability and the ability of our subsidiaries to, among other things: (i) incur or guarantee additional indebtedness or issue disqualified stock; and (ii) create or incur liens. Pursuant to the guidance in ASC 815 40, 815 40, 1 2 815 40 25 7 815 40 25 10. not 470 20, The Company incurred approximately $4.1 million in transaction costs in connection with the issuance of the Notes. These costs were recognized as a reduction of the carrying amount of the Notes utilizing the effective interest method and are being amortized over the term of the Notes. The following table sets forth interest expense information related to the Notes (in thousands): Three months ended September 30, Nine months ended September 30, 2023 2022 2023 2022 Contractual interest expense $ 1,006 $ 1,006 $ 3,019 $ 3,019 Amortization of debt issuance costs 208 208 618 618 Total interest cost $ 1,214 $ 1,214 $ 3,637 $ 3,637 Effective interest rate 5.1 % 5.1 % 5.1 % 5.1 %

Note 13 - Accrued Liabilities

Note 13 - Accrued Liabilities	9 Months Ended
Note 13 - Accrued Liabilities	Sep. 30, 2023
Notes to Financial Statements
Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block]	Note 13. Accrued liabilities consisted of the following for the periods indicated (in thousands): September 30, 2023 December 31, 2022 Accrued payroll $ 9,015 $ 9,702 Accrued employee benefits 3,129 3,265 Accrued state and local taxes 1,468 588 Accrued interest 550 1,597 Accrued shipping and tariff expenses 122 — Advanced payments 160 216 Accrued commission expenses 764 937 Accrued professional fees 240 409 Accrued product warranty 148 140 Accrued capital expenditure 67 — Accrued other 720 368 Total accrued liabilities $ 16,383 $ 17,222

Note 14 - Other Income and Expe

Note 14 - Other Income and Expense	9 Months Ended
Note 14 - Other Income and Expense	Sep. 30, 2023
Notes to Financial Statements
Other Nonoperating Income and Expense [Text Block]	Note 14. Other income and (expense) consisted of the following for the periods indicated (in thousands): Three months ended September 30, Nine months ended September 30, 2023 2022 2023 2022 Foreign exchange transaction loss $ (435 ) $ (598 ) $ (259 ) $ (1,409 ) Government subsidy income 77 49 910 150 Other non-operating gain 10 9 154 54 Gain (loss) on disposal of assets 5 (1 ) (2 ) 34 Total other income (expenses) , net $ (343 ) $ (541 ) $ 803 $ (1,171 )

Note 15 - Share-based Compensat

Note 15 - Share-based Compensation	9 Months Ended
Note 15 - Share-based Compensation	Sep. 30, 2023
Notes to Financial Statements
Share-Based Payment Arrangement [Text Block]	Note 15. Equity Plans The Company’s board of directors and stockholders approved the following equity plans: ● the 2013 "2013 ● the 2021 "2021 ● the 2023 The Company issued stock options, restricted stock awards ("RSAs") and restricted stock units ("RSUs") to employees, consultants and non-employee directors. Stock option awards generally vest over a four ten may September 2013, third Stock Options Options have been granted to the Company’s employees under the 2013 first ten The following is a summary of option activity: Weighted Weighted Weighted Average Average Average Share Price Weighted Remaining Aggregate Number of Exercise on Date of Average Contractual Intrinsic shares Price Exercise Fair Value Life Value (in thousands, except price data) Outstanding at January 1, 2023 263 $ 10.41 $ 5.45 0.71 $ - Exercised (32 ) 10.03 5.14 - 152 Forfeited (180 ) 9.50 5.03 - 266 Outstanding, September 30, 2023 51 13.84 7.12 0.33 - Exercisable, September 30, 2023 51 13.84 7.12 0.33 - Vested and expected to vest 51 13.84 7.12 0.33 - As of September 30, 2023 Performance Based Incentive June 2021. three third . The Company recognized three September 30, 2023 2022 The Company recognized nine September 30, 2023 2022 The following is a summary of PSU activity: Weighted Average Share Weighted Aggregate Number of Price on Date Average Fair Intrinsic shares of Release Value Value (in thousands, except price data) Outstanding at January 1, 2023 766 $ 6.75 $ 1,447 Granted 767 8.89 3,566 Released — — — Cancelled/Forfeited — — — Outstanding, September 30, 2023 1,533 7.82 16,813 Vested and expected to vest 1,533 7.82 16,813 As of September 30, 2023 lion ears Restricted Stock Units The following is a summary of RSU activity: Weighted Average Share Weighted Aggregate Number of Price on Date Average Fair Intrinsic shares of Release Value Value (in thousands, except price data) Outstanding at January 1, 2023 2,210 $ 5.76 $ 4,175 Granted 2,174 4.70 10,207 Released (1,062 ) 6.22 4,724 Cancelled/Forfeited (111 ) 3.98 1214 Outstanding, September 30, 2023 3,211 4.95 35,223 Vested and expected to vest 3,211 4.95 35,223 As of September 30, 2023 $14.2 million 2.5 years Share-Based Compensation Employee share-based compensation expenses recognized for the periods indicated (in thousands): Three months ended Nine months ended September 30, September 30, 2023 2022 2023 2022 Share-based compensation - by expense type Cost of goods sold $ 123 $ 121 $ 393 $ 371 Research and development 358 343 1,135 1,019 Sales and marketing 300 231 786 643 General and administrative 2,454 1,932 6,273 5,210 Total share-based compensation expense $ 3,235 $ 2,627 $ 8,587 $ 7,243

Note 16 - Income Taxes

Note 16 - Income Taxes	9 Months Ended
Note 16 - Income Taxes	Sep. 30, 2023
Notes to Financial Statements
Income Tax Disclosure [Text Block]	Note 16. For the three September 30, 2023 2022, The Company continually monitors and performs an assessment of the realizability of its DTAs, including an analysis of factors such as future taxable income, reversal of existing taxable temporary differences, and tax planning strategies. In assessing the need for a valuation allowance, the Company considered both positive and negative evidence related to the likelihood of realization of deferred tax assets using a “more likely than not” September 30, 2023

Note 17 - Geographic Informatio

Note 17 - Geographic Information	9 Months Ended
Note 17 - Geographic Information	Sep. 30, 2023
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	Note 17. The Company operates in one reportable segment. The Company’s Chief Executive Officer, who is considered to be the chief operating decision maker, manages the Company’s operations as a whole and reviews financial information presented on a consolidated basis, accompanied by information about product revenue, for purposes of evaluating financial performance and allocating resources. The following tables set forth the Company’s revenue and asset information by geographic region. Revenue is classified based on the location of where the product is manufactured. Long-lived assets in the tables below comprise only property, plant, equipment and intangible assets (in thousands): Three months ended September 30, Nine months ended September 30, 2023 2022 2023 2022 Revenues: United States $ 19,859 $ 2,027 $ 14,636 $ 5,732 Taiwan 37,194 46,716 113,851 111,700 China 5,494 7,950 28,706 43,801 $ 62,547 $ 56,693 $ 157,193 $ 161,233 As of the period ended September 30, December 31, 2023 2022 Long-lived assets: United States $ 75,108 $ 80,048 Taiwan 44,324 50,777 China 88,009 93,888 $ 207,441 $ 224,713

Note 18 - Contingencies

Note 18 - Contingencies	9 Months Ended
Note 18 - Contingencies	Sep. 30, 2023
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	Note 18. Litigation Overview From time to time, the Company may not The Company believes that there are no Other Contingencies On August 9, 2021, 2016 2019, not May 2021, April 2023 No third

Note 19 - Subsequent Events

Note 19 - Subsequent Events	9 Months Ended
Note 19 - Subsequent Events	Sep. 30, 2023
Notes to Financial Statements
Subsequent Events [Text Block]	Note 19. None

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended	9 Months Ended
Insider Trading Arrangements	Sep. 30, 2023 shares	Sep. 30, 2023 shares
ecd_TradingArrByIndTable
Material Terms of Trading Arrangement [Text Block]		5. Rule 10b5 1 The adoption or termination of contracts, instructions or written plans for the purchase or sale of our securities by our Section 16 three September 30, 2023, 10b5 1 10b5 1 Name Title Action Date Adopted Expiration Date Aggregate # of Securities to be Purchased/Sold Shu-Hua (Joshua) Yeh ( 1 SVP/Asia General Manager Adoption 8/16/2023 7/31/2024 42,799 Stefan Murry ( 2 CFO Adoption 9/15/2023 3/31/2024 20,000 ( 1 10b5 1 August 16, 2023. 42,799 July 31, 2024, ( 2 10b5 1 September 15, 2023. 20,000 March 31, 2024,
Non-Rule 10b5-1 Arrangement Adopted [Flag]	false
Rule 10b5-1 Arrangement Terminated [Flag]	false
Non-Rule 10b5-1 Arrangement Terminated [Flag]	false
Shu-Hua (Joshua) Yeh [Member]
ecd_TradingArrByIndTable
Trading Arrangement, Individual Name	Shu-Hua (Joshua) Yeh
Trading Arrangement, Individual Title	SVP/Asia General Manager
Rule 10b5-1 Arrangement Adopted [Flag]	true
Trading Arrangement Adoption Date	8/16/2023
Trading Arrangement Termination Date	7/31/2024
Trading Arrangement, Securities Aggregate Available Amount	42,799	42,799
Stefan Murry [Member]
ecd_TradingArrByIndTable
Trading Arrangement, Individual Name	Stefan Murry
Trading Arrangement, Individual Title	CFO
Rule 10b5-1 Arrangement Adopted [Flag]	true
Trading Arrangement Adoption Date	9/15/2023
Trading Arrangement Termination Date	3/31/2024
Trading Arrangement, Securities Aggregate Available Amount	20,000	20,000

Significant Accounting Policies

Significant Accounting Policies (Policies)	9 Months Ended
Significant Accounting Policies (Policies)	Sep. 30, 2023
Accounting Policies [Abstract]
New Accounting Pronouncements, Policy [Policy Text Block]	Recent Accounting Pronouncements Recent Accounting Pronouncements Yet to be Adopted To date, there have been no not

Note 3 - Revenue Recognition (T

Note 3 - Revenue Recognition (Tables)	9 Months Ended
Note 3 - Revenue Recognition (Tables)	Sep. 30, 2023
Notes Tables
Disaggregation of Revenue [Table Text Block]	Three months ended September 30, % of % of 2023 Revenue 2022 Revenue CATV $ 10,268 16.4 % $ 31,260 55.2 % Data Center 48,807 78.0 % 17,697 31.2 % Telecom 3,074 5.0 % 6,821 12.0 % FTTH — 0.0 % — 0.0 % Other 398 0.6 % 915 1.6 % Total Revenue $ 62,547 100.0 % $ 56,693 100.0 % Nine months ended September 30, % of % of 2023 Revenue 2022 Revenue CATV $ 47,391 30.1 % $ 79,953 49.6 % Data Center 96,731 61.5 % 60,608 37.5 % Telecom 11,013 7.0 % 18,362 11.4 % FTTH 57 0.1 % 124 0.1 % Other 2,001 1.3 % 2,186 1.4 % Total Revenue $ 157,193 100.0 % $ 161,233 100.0 %

Note 4 - Leases (Tables)

Note 4 - Leases (Tables)	9 Months Ended
Note 4 - Leases (Tables)	Sep. 30, 2023
Notes Tables
Lease, Cost [Table Text Block]	Three months ended September 30, Nine months ended September 30, 2023 2022 2023 2022 Operating lease expense $ 287 $ 283 $ 849 $ 882 Financing lease expense 8 8 24 24 Short Term lease expense 3 34 9 55 Total lease expense $ 298 $ 325 $ 882 $ 961
Lessee, Operating and Finance Lease, Liability, Maturity [Table Text Block]	Operating Financing 2024 $ 1,241 $ 49 2025 1,248 — 2026 1,110 — 2027 1,028 — 2028 1,038 — 2029 and thereafter 699 — Total lease payments 6,364 49 Less imputed interest (538 ) — Present value $ 5,826 $ 49 Nine months ended September 30, 2023 2022 Weighted Average Remaining Lease Term (Years) - operating leases 5.33 6.41 Weighted Average Remaining Lease Term (Years) - financing leases 0.08 1.08 Weighted Average Discount Rate - operating leases 3.28 % 3.22 % Weighted Average Discount Rate - financing leases 5.00 % 5.00 % Nine months ended September 30, 2023 2022 Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases $ 934 $ 903 Operating cash flows from financing lease 3 3 Financing cash flows from financing lease 15 14

Note 5 - Cash, Cash Equivalen_2

Note 5 - Cash, Cash Equivalents and Restricted Cash (Tables)	9 Months Ended
	Sep. 30, 2023
Notes Tables
Schedule of Cash and Cash Equivalents [Table Text Block]	September 30, December 31, 2023 2022 Cash and cash equivalents $ 21,940 $ 24,685 Restricted cash 9,301 10,902 Total cash, cash equivalents and restricted cash shown in the statement of cash flows $ 31,241 $ 35,587

Note 6 - Earnings (Loss) Per _2

Note 6 - Earnings (Loss) Per Share (Tables)	9 Months Ended
Note 6 - Earnings (Loss) Per Share (Tables)	Sep. 30, 2023
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	Three months ended September 30, Nine months ended September 30, 2023 2022 2023 2022 Numerator: Net loss $ (8,953 ) $ (15,627 ) $ (42,190 ) $ (46,147 ) Denominator: Weighted average shares used to compute net loss per share Basic 32,774 27,839 30,392 27,640 Diluted 32,774 27,839 30,392 27,640 Net loss per share Basic $ (0.27 ) $ (0.56 ) $ (1.39 ) $ (1.67 ) Diluted $ (0.27 ) $ (0.56 ) $ (1.39 ) $ (1.67 )
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]	Three months ended September 30, Nine months ended September 30, 2023 2022 2023 2022 Employee stock options 8 — — — Restricted stock units 2,650 322 973 — Shares for convertible senior notes 4,587 4,587 4,587 4,587 Total antidilutive shares 7,245 4,909 5,560 4,587

Note 7 - Inventories (Tables)

Note 7 - Inventories (Tables)	9 Months Ended
Note 7 - Inventories (Tables)	Sep. 30, 2023
Notes Tables
Schedule of Inventory, Current [Table Text Block]	September 30, 2023 December 31, 2022 Raw materials $ 26,566 $ 25,732 Work in process and sub-assemblies 32,838 39,563 Finished goods 8,129 14,384 Total inventories $ 67,533 $ 79,679

Note 8 - Property, Plant and _2

Note 8 - Property, Plant and Equipment (Tables)	9 Months Ended
Note 8 - Property, Plant and Equipment (Tables)	Sep. 30, 2023
Notes Tables
Property, Plant and Equipment [Table Text Block]	September 30, 2023 December 31, 2022 Land improvements $ 806 $ 806 Buildings and improvements 85,006 86,372 Machinery and equipment 245,802 251,216 Furniture and fixtures 5,309 5,382 Computer equipment and software 11,449 11,713 Transportation equipment 653 679 349,025 356,168 Less accumulated depreciation and amortization (185,824 ) (177,519 ) 163,201 178,649 Construction in progress 29,526 30,434 Land 1,101 1,101 Total property, plant and equipment, net $ 193,828 $ 210,184

Note 9 - Intangible Assets, N_2

Note 9 - Intangible Assets, Net (Tables)	9 Months Ended
Note 9 - Intangible Assets, Net (Tables)	Sep. 30, 2023
Notes Tables
Schedule of Finite-Lived Intangible Assets [Table Text Block]	September 30, 2023 Gross Accumulated Intangible Amount amortization assets, net Patents $ 9,363 $ (5,805 ) $ 3,558 Trademarks 95 (27 ) 68 Total intangible assets $ 9,458 $ (5,832 ) $ 3,626 December 31, 2022 Gross Accumulated Intangible Amount amortization assets, net Patents $ 8,994 $ (5,330 ) $ 3,664 Trademarks 56 (21 ) 35 Total intangible assets $ 9,050 $ (5,351 ) $ 3,699
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	2024 $ 668 2025 668 2026 668 2027 668 2028 668 2029 and thereafter 286 $ 3,626

Note 11 - Notes Payable and L_2

Note 11 - Notes Payable and Long-term Debt (Tables)	9 Months Ended
Note 11 - Notes Payable and Long-term Debt (Tables)	Sep. 30, 2023
Notes Tables
Schedule of Debt [Table Text Block]	September 30, 2023 December 31, 2022 Revolving line of credit with a U.S. bank up to $ 27.780 9.190 12/14/2023 11/16/2025 — $ 25,000 Revolving line of credit with a China bank up to $ 19.04 4.57 6.12 May 24, 2024 13,413 13,102 Credit facility with a China bank up to $ 26.65 4.45 6.6 June 6, 2027 18,802 20,140 Credit facility with a China bank up to $ 728 2.7 November 23, 2023 — — Sub-total 32,215 58,242 Less debt issuance costs, net (892 ) (1,168 ) Grand total 31,323 57,074 Less current portion (31,323 ) (57,074 ) Non-current portion $ — $ — Bank Acceptance Notes Payable Bank acceptance notes issued to vendors with a zero percent interest rate $ 14,383 $ 12,337
Schedule of Maturities of Long-Term Debt [Table Text Block]	Within one year $ 31,323 Beyond one year — Total outstanding $ 31,323

Note 12 - Convertible Senior _2

Note 12 - Convertible Senior Notes (Tables)	9 Months Ended
Note 12 - Convertible Senior Notes (Tables)	Sep. 30, 2023
Notes Tables
Convertible Debt [Table Text Block]	September 30, December 31, 2023 2022 Principal $ 80,500 $ 80,500 Unamortized debt issuance costs (376 ) (994 ) Net carrying amount $ 80,124 $ 79,506
Interest Income and Interest Expense Disclosure [Table Text Block]	Three months ended September 30, Nine months ended September 30, 2023 2022 2023 2022 Contractual interest expense $ 1,006 $ 1,006 $ 3,019 $ 3,019 Amortization of debt issuance costs 208 208 618 618 Total interest cost $ 1,214 $ 1,214 $ 3,637 $ 3,637 Effective interest rate 5.1 % 5.1 % 5.1 % 5.1 %

Note 13 - Accrued Liabilities (

Note 13 - Accrued Liabilities (Tables)	9 Months Ended
Note 13 - Accrued Liabilities (Tables)	Sep. 30, 2023
Notes Tables
Schedule of Accrued Liabilities [Table Text Block]	September 30, 2023 December 31, 2022 Accrued payroll $ 9,015 $ 9,702 Accrued employee benefits 3,129 3,265 Accrued state and local taxes 1,468 588 Accrued interest 550 1,597 Accrued shipping and tariff expenses 122 — Advanced payments 160 216 Accrued commission expenses 764 937 Accrued professional fees 240 409 Accrued product warranty 148 140 Accrued capital expenditure 67 — Accrued other 720 368 Total accrued liabilities $ 16,383 $ 17,222

Note 14 - Other Income and Ex_2

Note 14 - Other Income and Expense (Tables)	9 Months Ended
Note 14 - Other Income and Expense (Tables)	Sep. 30, 2023
Notes Tables
Schedule of Other Nonoperating Income (Expense) [Table Text Block]	Three months ended September 30, Nine months ended September 30, 2023 2022 2023 2022 Foreign exchange transaction loss $ (435 ) $ (598 ) $ (259 ) $ (1,409 ) Government subsidy income 77 49 910 150 Other non-operating gain 10 9 154 54 Gain (loss) on disposal of assets 5 (1 ) (2 ) 34 Total other income (expenses) , net $ (343 ) $ (541 ) $ 803 $ (1,171 )

Note 15 - Share-based Compens_2

Note 15 - Share-based Compensation (Tables)	9 Months Ended
Note 15 - Share-based Compensation (Tables)	Sep. 30, 2023
Notes Tables
Share-Based Payment Arrangement, Option, Activity [Table Text Block]	Weighted Weighted Weighted Average Average Average Share Price Weighted Remaining Aggregate Number of Exercise on Date of Average Contractual Intrinsic shares Price Exercise Fair Value Life Value (in thousands, except price data) Outstanding at January 1, 2023 263 $ 10.41 $ 5.45 0.71 $ - Exercised (32 ) 10.03 5.14 - 152 Forfeited (180 ) 9.50 5.03 - 266 Outstanding, September 30, 2023 51 13.84 7.12 0.33 - Exercisable, September 30, 2023 51 13.84 7.12 0.33 - Vested and expected to vest 51 13.84 7.12 0.33 -
Share-Based Payment Arrangement, Performance Shares, Activity [Table Text Block]	Weighted Average Share Weighted Aggregate Number of Price on Date Average Fair Intrinsic shares of Release Value Value (in thousands, except price data) Outstanding at January 1, 2023 766 $ 6.75 $ 1,447 Granted 767 8.89 3,566 Released — — — Cancelled/Forfeited — — — Outstanding, September 30, 2023 1,533 7.82 16,813 Vested and expected to vest 1,533 7.82 16,813
Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]	Weighted Average Share Weighted Aggregate Number of Price on Date Average Fair Intrinsic shares of Release Value Value (in thousands, except price data) Outstanding at January 1, 2023 2,210 $ 5.76 $ 4,175 Granted 2,174 4.70 10,207 Released (1,062 ) 6.22 4,724 Cancelled/Forfeited (111 ) 3.98 1214 Outstanding, September 30, 2023 3,211 4.95 35,223 Vested and expected to vest 3,211 4.95 35,223
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]	Three months ended Nine months ended September 30, September 30, 2023 2022 2023 2022 Share-based compensation - by expense type Cost of goods sold $ 123 $ 121 $ 393 $ 371 Research and development 358 343 1,135 1,019 Sales and marketing 300 231 786 643 General and administrative 2,454 1,932 6,273 5,210 Total share-based compensation expense $ 3,235 $ 2,627 $ 8,587 $ 7,243

Note 17 - Geographic Informat_2

Note 17 - Geographic Information (Tables)	9 Months Ended
Note 17 - Geographic Information (Tables)	Sep. 30, 2023
Notes Tables
Revenue from External Customers by Geographic Areas [Table Text Block]	Three months ended September 30, Nine months ended September 30, 2023 2022 2023 2022 Revenues: United States $ 19,859 $ 2,027 $ 14,636 $ 5,732 Taiwan 37,194 46,716 113,851 111,700 China 5,494 7,950 28,706 43,801 $ 62,547 $ 56,693 $ 157,193 $ 161,233
Long-Lived Assets by Geographic Areas [Table Text Block]	As of the period ended September 30, December 31, 2023 2022 Long-lived assets: United States $ 75,108 $ 80,048 Taiwan 44,324 50,777 China 88,009 93,888 $ 207,441 $ 224,713

Note 3 - Revenue Recognition (D

Note 3 - Revenue Recognition (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Contract with Customer, Liability	$ 12,500		$ 12,500		$ 3,000
Contract with Customer, Liability, Revenue Recognized	$ 1,900	$ 0	$ 3,100	$ 0

Note 3 - Revenue Recognition -

Note 3 - Revenue Recognition - Revenue by Major Product Category (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenue, net	$ 62,547		$ 56,693	$ 157,193	$ 161,233
Percent of Revenue		100%	100%	100%	100%
CATV [Member]
Revenue, net	10,268		$ 31,260	$ 47,391	$ 79,953
Percent of Revenue		16.40%	55.20%	30.10%	49.60%
Data Center [Member]
Revenue, net	48,807		$ 17,697	$ 96,731	$ 60,608
Percent of Revenue		78%	31.20%	61.50%	37.50%
Telecom [Member]
Revenue, net	3,074		$ 6,821	$ 11,013	$ 18,362
Percent of Revenue		5%	12%	7%	11.40%
FTTH [Member]
Revenue, net	0		$ 0	$ 57	$ 124
Percent of Revenue		0%	0%	0.10%	0.10%
Product and Service, Other [Member]
Revenue, net	$ 398		$ 915	$ 2,001	$ 2,186
Percent of Revenue		0.60%	1.60%	1.30%	1.40%

Note 4 - Leases (Details Textua

Note 4 - Leases (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Note 4 - Leases (Details Textual) - USD ($) $ in Thousands	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Lease, Cost	$ 298	$ 325	$ 882	$ 961
Selling, General and Administrative Expenses [Member]
Lease, Cost	$ 300	$ 300	$ 900	$ 1,000

Note 4 - Leases - Components of

Note 4 - Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Operating lease expense	$ 287	$ 283	$ 849	$ 882
Financing lease expense	8	8	24	24
Short Term lease expense	3	34	9	55
Total lease expense	$ 298	$ 325	$ 882	$ 961

Note 4 - Leases - Maturities of

Note 4 - Leases - Maturities of Lease Liabilities (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
2024, operating	$ 1,241
2024, finance	49
2025, operating	1,248
2025, finance	0
2026, operating	1,110
2026, finance	0
2027, operating	1,028
2027, finance	0
2028, operating	1,038
2028, finance	0
2029 and thereafter, operating	699
2029 and thereafter, finance	0
Total operating lease payments	6,364
Total financing lease payments, finance leases	49
Less imputed interest, operating leases, operating	(538)
Less imputed interest, financing leases	0
Present value, operating leases	5,826
Present value, financing leases	$ 49
Weighted Average Remaining Lease Term (Years) - operating leases (Year)	5 years 3 months 29 days	6 years 4 months 28 days
Weighted Average Remaining Lease Term (Years) - financing leases (Year)	29 days	1 year 29 days
Weighted Average Discount Rate - operating leases	3.28%	3.22%
Weighted Average Discount Rate - financing leases	5%	5%
Operating cash flows from operating leases	$ 934	$ 903
Operating cash flows from financing lease	3	3
Financing cash flows from financing lease	$ 15	$ 14

Note 5 - Cash, Cash Equivalen_3

Note 5 - Cash, Cash Equivalents and Restricted Cash (Details Textual) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Restricted Cash and Cash Equivalents, Current	$ 9,301	$ 10,902
CHINA
Certificates of Deposit, at Carrying Value	2,500	1,100
Bankers Acceptance [Member]
Restricted Cash and Cash Equivalents, Current	6,200	8,700
Guarantee Deposits for Customs Duties [Member]
Restricted Cash and Cash Equivalents, Current	$ 700	$ 1,000

Note 5 - Cash, Cash Equivalen_4

Note 5 - Cash, Cash Equivalents and Restricted Cash - Summary of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Cash and cash equivalents	$ 21,940	$ 24,685
Restricted cash	9,301	10,902
Total cash, cash equivalents and restricted cash shown in the statement of cash flows	$ 31,241	$ 35,587

Note 6 - Earnings (Loss) Per _3

Note 6 - Earnings (Loss) Per Share - Computation of Basic and Diluted Net Income (Loss) per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Net loss	$ (8,953)	$ (15,627)	$ (42,190)	$ (46,147)
Basic (in shares)	32,774,148	27,839,245	30,392,483	27,639,671
Diluted (in shares)	32,774,148	27,839,245	30,392,483	27,639,671
Basic (in dollars per share)	$ (0.27)	$ (0.56)	$ (1.39)	$ (1.67)
Diluted (in dollars per share)	$ (0.27)	$ (0.56)	$ (1.39)	$ (1.67)

Note 6 - Earnings (Loss) Per _4

Note 6 - Earnings (Loss) Per Share - Potentially Dilutive Securities Excluded from Diluted Net Income (Loss) per Share (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Total antidilutive share (in shares)	7,245	4,909	5,560	4,587
Share-Based Payment Arrangement, Option [Member]
Total antidilutive share (in shares)	8		0	0
Restricted Stock Units (RSUs) [Member]
Total antidilutive share (in shares)	2,650	322	973	0
Convertible Debt Securities [Member]
Total antidilutive share (in shares)	4,587	4,587	4,587	4,587

Note 7 - Inventories (Details T

Note 7 - Inventories (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Inventory, LIFO Reserve, Period Charge	$ 2,400	$ 1,400	$ 7,454	$ 3,852
Inventory Write-down	$ 1,500	$ 1,100	$ 8,400	$ 3,800

Note 7 - Inventories - Inventor

Note 7 - Inventories - Inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Raw materials	$ 26,566	$ 25,732
Work in process and sub-assemblies	32,838	39,563
Finished goods	8,129	14,384
Total inventories	$ 67,533	$ 79,679

Note 8 - Property, Plant and _3

Note 8 - Property, Plant and Equipment (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Depreciation	$ 4,800	$ 5,500	$ 15,000	$ 17,200
Interest Paid, Capitalized, Investing Activities	0	$ 0
Asset Impairment Charges	$ 0

Note 8 - Property, Plant and _4

Note 8 - Property, Plant and Equipment - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Property, plant and equipment, gross	$ 349,025	$ 356,168
Less accumulated depreciation and amortization	(185,824)	(177,519)
Property, plant and equipment, net before construction in progress and land	163,201	178,649
Property, plant and equipment, net	193,828	210,184
Land Improvements [Member]
Property, plant and equipment, gross	806	806
Building and Building Improvements [Member]
Property, plant and equipment, gross	85,006	86,372
Machinery and Equipment [Member]
Property, plant and equipment, gross	245,802	251,216
Furniture and Fixtures [Member]
Property, plant and equipment, gross	5,309	5,382
Computer Equipment and Software [Member]
Property, plant and equipment, gross	11,449	11,713
Vehicles [Member]
Property, plant and equipment, gross	653	679
Construction in Progress [Member]
Property, plant and equipment, net	29,526	30,434
Land [Member]
Property, plant and equipment, net	$ 1,101	$ 1,101

Note 9 - Intangible Assets, N_3

Note 9 - Intangible Assets, Net (Details Textual) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Amortization of Intangible Assets	$ 0.2	$ 0.2	$ 0.5	$ 0.5
Finite-Lived Intangible Assets, Remaining Amortization Period (Year)	5 years 4 months 24 days		5 years 4 months 24 days

Note 9 - Intangible Assets, N_4

Note 9 - Intangible Assets, Net - Finite-lived Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Intangible assets, gross amount	$ 9,458	$ 9,050
Intangible assets, accumulated amortization	(5,832)	(5,351)
Intangible assets, net	3,626	3,699
Patents [Member]
Intangible assets, gross amount	9,363	8,994
Intangible assets, accumulated amortization	(5,805)	(5,330)
Intangible assets, net	3,558	3,664
Trademarks [Member]
Intangible assets, gross amount	95	56
Intangible assets, accumulated amortization	(27)	(21)
Intangible assets, net	$ 68	$ 35

Note 9 - Intangible Assets, N_5

Note 9 - Intangible Assets, Net - Future Amortization Expense (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
2024	$ 668
2025	668
2026	668
2027	668
2028	668
2029 and thereafter	286
Finite-Lived Intangible Assets, Net	$ 3,626	$ 3,699

Note 10 - Fair Value of Finan_2

Note 10 - Fair Value of Financial Instruments (Details Textual) - Senior Notes [Member] - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Convertible Debt, Fair Value Disclosures	$ 85.2	$ 58.3
Convertible Debt	$ 56.5	$ 79.5

Note 11 - Notes Payable and L_3

Note 11 - Notes Payable and Long-term Debt (Details Textual) $ in Thousands	Nov. 16, 2022 USD ($)	Jun. 07, 2022 USD ($)	May 24, 2019 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jun. 07, 2022 CNY (¥)	May 24, 2019 CNY (¥)
Debt Instrument, Unused Borrowing Capacity, Amount				$ 42,200	$ 13,300
Cash Collateral for Borrowed Securities				9,300	9,900
Revolving Credit Facility [Member] \| CIT Northbridge Credit, LLC [Member] \| Loan Security and Guarantee Agreement [Member]
Debt Instrument, Term (Year)	3 years
Line of Credit Facility, Maximum Borrowing Capacity	$ 27,780			27,780	27,780
Long-Term Line of Credit				0
Revolving Credit Facility [Member] \| CIT Northbridge Credit, LLC [Member] \| Loan Security and Guarantee Agreement [Member] \| Secured Overnight Financing Rate (SOFR) [Member]
Debt Instrument, Basis Spread on Variable Rate, Monthly Usage Less Than 50 Percentage	3.75%
Debt Instrument, Basis Spread on Variable Rate	4.75%
Revolving Credit Facility [Member] \| SPD Bank [Member]
Line of Credit Facility, Maximum Borrowing Capacity				19,040	19,040
Revolving Credit Facility [Member] \| SPD Bank [Member] \| The SPD Credit Line [Member] \| Global Technology, Inc. [Member]
Debt Instrument, Term (Year)			5 years
Line of Credit Facility, Maximum Borrowing Capacity			$ 25,400				¥ 180,000,000
Long-Term Line of Credit				13,400
Revolving Credit Facility [Member] \| China Zheshang Bank Co., Ltd [Member]
Line of Credit Facility, Maximum Borrowing Capacity				728	728
Revolving Credit Facility [Member] \| China Zheshang Bank Co., Ltd [Member] \| The ¥200M Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity				26,650	$ 26,650
Revolving Credit Facility [Member] \| China Zheshang Bank Co., Ltd [Member] \| The ¥200M Credit Facility [Member] \| Global Technology, Inc. [Member]
Debt Instrument, Term (Year)		5 years
Line of Credit Facility, Maximum Borrowing Capacity		$ 29,900				¥ 200,000,000
Long-Term Line of Credit				18,800
Bank Acceptances Executed				$ 3,600

Note 11 - Notes Payable and L_4

Note 11 - Notes Payable and Long-term Debt - Schedule of Notes Payable and Long-term Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Long-term debt	$ 32,215	$ 58,242
Less debt issuance costs, net	(892)	(1,168)
Total outstanding	31,323	57,074
Less current portion	(31,323)	(57,074)
Non-current portion	0	0
Bank acceptance notes issued to vendors with a zero percent interest rate	14,383	12,337
CIT Northbridge Credit, LLC [Member] \| Revolving Credit Facility [Member] \| Loan Security and Guarantee Agreement [Member]
Long-term debt	0	25,000
SPD Bank [Member] \| Revolving Credit Facility [Member]
Long-term debt	13,413	13,102
China Zheshang Bank Co., Ltd [Member] \| Revolving Credit Facility [Member]
Long-term debt	0	0
China Zheshang Bank Co., Ltd [Member] \| Revolving Credit Facility [Member] \| The ¥200M Credit Facility [Member]
Long-term debt	$ 18,802	$ 20,140

Note 11 - Notes Payable and L_5

Note 11 - Notes Payable and Long-term Debt - Schedule of Notes Payable and Long-term Debt (Details) (Parentheticals) - Revolving Credit Facility [Member] - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022	Nov. 16, 2022
CIT Northbridge Credit, LLC [Member] \| Loan Security and Guarantee Agreement [Member]
Long-term debt, maximum	$ 27,780	$ 27,780	$ 27,780
Long-term debt, interest	9.19%	9.19%
CIT Northbridge Credit, LLC [Member] \| Loan Security and Guarantee Agreement [Member] \| Minimum [Member]
Long-term debt, maturity date	Dec. 14, 2023	Dec. 14, 2023
CIT Northbridge Credit, LLC [Member] \| Loan Security and Guarantee Agreement [Member] \| Maximum [Member]
Long-term debt, maturity date	Nov. 16, 2025	Nov. 16, 2025
SPD Bank [Member]
Long-term debt, maximum	$ 19,040	$ 19,040
Long-term debt, maturity date	May 24, 2024	May 24, 2024
SPD Bank [Member] \| Minimum [Member]
Long-term debt, interest	4.57%	4.57%
SPD Bank [Member] \| Maximum [Member]
Long-term debt, interest	6.12%	6.12%
China Zheshang Bank Co., Ltd [Member]
Long-term debt, maximum	$ 728	$ 728
Long-term debt, interest	2.70%	2.70%
Long-term debt, maturity date	Nov. 23, 2023	Nov. 23, 2023
China Zheshang Bank Co., Ltd [Member] \| The ¥200M Credit Facility [Member]
Long-term debt, maximum	$ 26,650	$ 26,650
Long-term debt, maturity date	Jun. 06, 2027	Jun. 06, 2027
China Zheshang Bank Co., Ltd [Member] \| The ¥200M Credit Facility [Member] \| Minimum [Member]
Long-term debt, interest	4.45%	4.45%
China Zheshang Bank Co., Ltd [Member] \| The ¥200M Credit Facility [Member] \| Maximum [Member]
Long-term debt, interest	6.60%	6.60%

Note 11 - Notes Payable and L_6

Note 11 - Notes Payable and Long-term Debt - Maturities of Notes Payable and Long-term Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Within one year	$ 31,323
Beyond one year	0
Total outstanding	$ 31,323	$ 57,074

Note 12 - Convertible Senior _3

Note 12 - Convertible Senior Notes (Details Textual) - USD ($)	Mar. 05, 2019	Sep. 30, 2023	Dec. 31, 2022
Truist Bank [Member] \| CapEx Loan and Term Loan [Member]
Repayments of Long-term Debt, Total	$ 37,800,000
The 5% Convertible Senior Notes Due 2024 [Member]
Debt Instrument, Face Amount	$ 80,500,000	$ 80,500,000	$ 80,500,000
Debt Instrument, Interest Rate, Stated Percentage	5%
Proceeds from Convertible Debt	$ 76,400,000
Debt Conversion, Converted Instrument, Shares Issued (in shares)	56.9801
Debt Conversion, Converted Instrument, Amount	$ 1,000
Debt Instrument, Convertible, Conversion Price (in dollars per share)	$ 17.55
Debt Instrument, Convertible, Conversion Price Premium, Percentage	30%
Share Price (in dollars per share)	$ 13.5
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger	130%
Debt Instrument, Convertible, Threshold Trading Days	20
Debt Instrument, Convertible, Threshold Consecutive Trading Days	30
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed	100%
Debt Issuance Costs, Gross	$ 4,100,000

Note 12 - Convertible Senior _4

Note 12 - Convertible Senior Notes - Schedule of Carrying Value of Convertible Senior Notes (Details) - The 5% Convertible Senior Notes Due 2024 [Member] - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Mar. 05, 2019
Principal	$ 80,500	$ 80,500	$ 80,500
Unamortized debt issuance costs	(376)	(994)
Net carrying amount	$ 80,124	$ 79,506

Note 12 - Convertible Senior _5

Note 12 - Convertible Senior Notes - Schedule of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Amortization of debt issuance costs			$ 928	$ 641
The 5% Convertible Senior Notes Due 2024 [Member]
Contractual interest expense	$ 1,006	$ 1,006	3,019	3,019
Amortization of debt issuance costs	208	208	618	618
Total interest cost	$ 1,214	$ 1,214	$ 3,637	$ 3,637
Effective interest rate	5.10%	5.10%	5.10%	5.10%

Note 13 - Accrued Liabilities -

Note 13 - Accrued Liabilities - Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Accrued payroll	$ 9,015		$ 9,702
Accrued employee benefits	3,129		3,265
Accrued state and local taxes	1,468		588
Accrued interest	550		1,597
Accrued shipping and tariff expenses	122		0
Advanced payments	160		216
Accrued commission expenses	764		937
Accrued professional fees	240		409
Accrued product warranty	148		140
Accrued capital expenditure	67		0
Accrued other	720		368
Total accrued liabilities	$ 16,383	$ 17,222	$ 17,222

Note 14 - Other Income and Ex_3

Note 14 - Other Income and Expense - Other Income and Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Foreign exchange transaction loss	$ (435)	$ (598)	$ (259)	$ (1,409)
Government subsidy income	77	49	910	150
Other non-operating gain	10	9	154	54
Gain (loss) on disposal of assets	5	(1)	(2)	34
Total other income (expenses) , net	$ (343)	$ (541)	$ 803	$ (1,171)

Note 15 - Share-based Compens_3

Note 15 - Share-based Compensation (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount	$ 0		$ 0
Share-Based Payment Arrangement, Expense	$ 3,235	$ 2,627	8,587	$ 7,243
Share-Based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)	4 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)	10 years
Share-Based Payment Arrangement, Option [Member] \| Exercisable on the First Anniversary Date Following the Date of Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	25%
Share-Based Payment Arrangement, Option [Member] \| Exercisable on Semi-annual Basis [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	12.50%
Performance Shares [Member]
Share-Based Payment Arrangement, Expense	$ 1,100	$ 500	2,000	$ 1,200
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 7,600		$ 7,600
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			2 years 3 months 18 days
Performance Shares [Member] \| Minimum [Member]
Sharebased Compensation Arrangement By Sharebased Payment Award Performance Award Value Percentage Of Based Amount	0%		0%
Performance Shares [Member] \| Maximum [Member]
Sharebased Compensation Arrangement By Sharebased Payment Award Performance Award Value Percentage Of Based Amount	200%		200%
Performance Shares [Member] \| Vesting on the Third Anniversary [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	100%
Restricted Stock Units (RSUs) [Member]
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 14,200		$ 14,200
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			2 years 6 months

Note 15 - Share-based Compens_4

Note 15 - Share-based Compensation - Option Activity (Details) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2023 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) $ / shares shares
Outstanding, number of shares (in shares) \| shares	263
Outstanding, weighted average exercise price (in dollars per share)	$ 10.41
Outstanding, weighted average fair value (in dollars per share)	$ 5.45
Outstanding, weighted average remaining contractual life (Year)	3 months 29 days	8 months 15 days
Outstanding, aggregate intrinsic value \| $	$ 0	$ 0
Exercised, number of shares (in shares) \| shares	(32)
Exercised, weighted average exercise price (in dollars per share)	$ 10.03
Exercised, weighted average fair value (in dollars per share)	$ 5.14
Exercised, aggregate intrinsic value \| $	$ 152
Forfeited, number of shares (in shares) \| shares	(180)
Forfeited, weighted average exercise price (in dollars per share)	$ 9.5
Forfeited, weighted average fair value (in dollars per share)	$ 5.03
Forfeited, aggregate intrinsic value \| $	$ 266
Outstanding, number of shares (in shares) \| shares	51	263
Outstanding, weighted average exercise price (in dollars per share)	$ 13.84	$ 10.41
Outstanding, weighted average fair value (in dollars per share)	$ 7.12	$ 5.45
Exercisable, number of shares (in shares) \| shares	51
Exercisable, weighted average exercise price (in dollars per share)	$ 13.84
Exercisable, weighted average fair value (in dollars per share)	$ 7.12
Exercisable, weighted average remaining contractual life (Year)	3 months 29 days
Exercisable, aggregate intrinsic value \| $	$ 0
Vested and expected to vest, number of shares (in shares) \| shares	51
Vested and expected to vest, weighted average exercise price (in dollars per share)	$ 13.84
Vested and expected to vest, weighted average fair value (in dollars per share)	$ 7.12
Vested and expected to vest, weighted average remaining contractual life (Year)	3 months 29 days
Vested and expected to vest, aggregate intrinsic value \| $	$ 0

Note 15 - Share-based Compens_5

Note 15 - Share-based Compensation - Performance Stock Units Activity (Details) - Performance Shares [Member] $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($) $ / shares shares
Outstanding, number of shares (in shares) \| shares	766
Outstanding, weighted average fair value (in dollars per share) \| $ / shares	$ 6.75
Outstanding, aggregate intrinsic value \| $	$ 1,447
Granted, number of shares (in shares) \| shares	767
Granted, weighted average fair value (in dollars per share) \| $ / shares	$ 8.89
Granted, aggregate intrinsic value \| $	$ 3,566
Released, number of shares (in shares) \| shares	0
Released, weighted average fair value (in dollars per share) \| $ / shares	$ 0
Released, aggregate intrinsic value \| $	$ 0
Cancelled/Forfeited, number of shares (in shares) \| shares	0
Cancelled/Forfeited, weighted average fair value (in dollars per share) \| $ / shares	$ 0
Cancelled/Forfeited, aggregate intrinsic value \| $	$ 0
Outstanding, number of shares (in shares) \| shares	1,533
Outstanding, weighted average fair value (in dollars per share) \| $ / shares	$ 7.82
Outstanding, aggregate intrinsic value \| $	$ 16,813
Vested and expected to vest, number of shares (in shares) \| shares	1,533
Vested and expected to vest, weighted average fair value (in dollars per share) \| $ / shares	$ 7.82
Vested and expected to vest, aggregate intrinsic value \| $	$ 16,813

Note 15 - Share-based Compens_6

Note 15 - Share-based Compensation - Restricted Stock Unit/Awards Activity (Details) - Restricted Stock Units (RSUs) [Member] $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($) $ / shares shares
Outstanding, number of shares (in shares) \| shares	2,210
Outstanding, weighted average fair value (in dollars per share) \| $ / shares	$ 5.76
Outstanding, aggregate intrinsic value \| $	$ 4,175
Granted, number of shares (in shares) \| shares	2,174
Granted, weighted average fair value (in dollars per share) \| $ / shares	$ 4.7
Granted, aggregate intrinsic value \| $	$ 10,207
Released, number of shares (in shares) \| shares	(1,062)
Released, weighted average fair value (in dollars per share) \| $ / shares	$ 6.22
Released, aggregate intrinsic value \| $	$ 4,724
Cancelled/Forfeited, number of shares (in shares) \| shares	(111)
Cancelled/Forfeited, weighted average fair value (in dollars per share) \| $ / shares	$ 3.98
Cancelled/Forfeited, aggregate intrinsic value \| $	$ 1,214
Outstanding, number of shares (in shares) \| shares	3,211
Outstanding, weighted average fair value (in dollars per share) \| $ / shares	$ 4.95
Outstanding, aggregate intrinsic value \| $	$ 35,223
Vested and expected to vest, number of shares (in shares) \| shares	3,211
Vested and expected to vest, weighted average fair value (in dollars per share) \| $ / shares	$ 4.95
Vested and expected to vest, aggregate intrinsic value \| $	$ 35,223

Note 15 - Share-based Compens_7

Note 15 - Share-based Compensation - Share-based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Total share-based compensation expense	$ 3,235	$ 2,627	$ 8,587	$ 7,243
Cost of Sales [Member]
Total share-based compensation expense	123	121	393	371
Research and Development Expense [Member]
Total share-based compensation expense	358	343	1,135	1,019
Selling and Marketing Expense [Member]
Total share-based compensation expense	300	231	786	643
General and Administrative Expense [Member]
Total share-based compensation expense	$ 2,454	$ 1,932	$ 6,273	$ 5,210

Note 16 - Income Taxes (Details

Note 16 - Income Taxes (Details Textual)	3 Months Ended
Note 16 - Income Taxes (Details Textual)	Sep. 30, 2023	Sep. 30, 2022
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21%	21%

Note 17 - Geographic Informat_3

Note 17 - Geographic Information (Details Textual)	3 Months Ended
Note 17 - Geographic Information (Details Textual)	Sep. 30, 2023
Number of Reportable Segments	1

Note 17 - Geographic Informat_4

Note 17 - Geographic Information - Revenue Information by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenue, net	$ 62,547	$ 56,693	$ 157,193	$ 161,233
UNITED STATES
Revenue, net	19,859	2,027	14,636	5,732
TAIWAN
Revenue, net	37,194	46,716	113,851	111,700
CHINA
Revenue, net	$ 5,494	$ 7,950	$ 28,706	$ 43,801

Note 17 - Geographic Informat_5

Note 17 - Geographic Information - Asset Information by Geographic Region (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Long-lived assets	$ 207,441	$ 224,713
UNITED STATES
Long-lived assets	75,108	80,048
TAIWAN
Long-lived assets	44,324	50,777
CHINA
Long-lived assets	$ 88,009	$ 93,888

Note 18 - Contingencies (Detail

Note 18 - Contingencies (Details Textual) - Loss Contingency, Obligation for Sales and Use Tax [Member] $ in Millions	Aug. 09, 2021 USD ($)
Loss Contingency, Potential Obligation	$ 1
Loss Contingency Accrual, Payments	$ 0.4