Applied Optoelectronics (AAOI) 10-Q5 May 222022 Q1 Quarterly reportFinancial data

Company Profile

Document And Entity Information

Document And Entity Information - shares	3 Months Ended
Document And Entity Information - shares	Mar. 31, 2022	May 02, 2022
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	Q1
Document Fiscal Year Focus	2022
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2022
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	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		27,634,082

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current Assets
Cash and cash equivalents	$ 31,980	$ 34,656
Restricted cash	8,128	6,480
Accounts receivable - trade, net of allowance of $29 and $30, respectively	54,218	47,944
Notes receivable	1,195	8,148
Inventories	92,007	92,516
Prepaid income tax	0	1
Prepaid expenses and other current assets	5,711	4,334
Total current assets	193,239	194,079
Property, plant and equipment, net	236,774	243,035
Land use rights, net	5,848	5,856
Operating right of use asset	6,623	7,078
Financing right of use asset	49	57
Intangible assets, net	3,792	3,836
Other assets, net	428	518
TOTAL ASSETS	446,753	454,459
Current liabilities
Current portion of notes payable and long-term debt	52,233	49,689
Accounts payable	40,044	34,402
Bank acceptance payable	9,955	8,198
Current lease liability - operating	1,046	1,062
Current lease liability - financing	19	19
Accrued liabilities	13,237	15,587
Total current liabilities	116,534	108,957
Notes payable and long-term debt, less current portion	5,000	5,000
Convertible senior notes	78,884	78,680
Non-current lease liability - operating	6,699	7,189
Non-current lease liability - financing	59	63
TOTAL LIABILITIES	207,176	199,889
Stockholders' equity:
Preferred Stock; 5,000 shares authorized at $0.001 par value; no shares issued and outstanding at March 31, 2022 and December 31, 2021, respectively	0	0
Common Stock; 45,000 shares authorized at $0.001 par value; 27,530 and 27,323 shares issued and outstanding at March 31, 2022 and December 31, 2021, respectively	27	27
Additional paid-in capital	383,474	381,143
Accumulated other comprehensive income	14,809	16,071
Accumulated deficit	(158,733)	(142,671)
TOTAL STOCKHOLDERS' EQUITY	239,577	254,570
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 446,753	$ 454,459

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) - USD ($) shares in Thousands, $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Accounts receivable, allowance	$ 29	$ 30
Preferred stock, shares authorized (in shares)	5,000	5,000
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, shares authorized (in shares)	45,000	45,000
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares issued (in shares)	27,530	27,323
Common stock, shares outstanding (in shares)	27,530	27,323

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue, net	$ 52,242	$ 49,701
Cost of goods sold	43,217	38,982
Gross profit	9,025	10,719
Operating expenses
Research and development	9,486	10,928
Sales and marketing	2,558	2,960
General and administrative	11,220	10,869
Total operating expenses	23,264	24,757
Loss from operations	(14,239)	(14,038)
Other income (expense)
Interest income	28	16
Interest expense	(1,401)	(1,431)
Other income (expense), net	(450)	(169)
Total other income (expense), net	(1,823)	(1,584)
Loss before income taxes	(16,062)	(15,622)
Income tax expense	0	0
Net loss	$ (16,062)	$ (15,622)
Net loss per share
Basic (in dollars per share)	$ (0.58)	$ (0.59)
Diluted (in dollars per share)	$ (0.58)	$ (0.59)
Weighted average shares used to compute net loss per share:
Basic (in shares)	27,463,321	26,438,071
Diluted (in shares)	27,463,321	26,438,071

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Net loss	$ (16,062)	$ (15,622)
Loss on foreign currency translation adjustment	(1,262)	(1,034)
Comprehensive loss	$ (17,324)	$ (16,656)

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, 2020	0	25,110
Balance at Dec. 31, 2020	$ 0	$ 25	$ 354,685	$ 11,690	$ (88,509)	$ 277,891
Issuance of restricted stock, net of shares withheld for employee tax (in shares)	0	164
Issuance of restricted stock, net of shares withheld for employee tax	$ 0	$ 0	(258)	0	0	(258)
Share-based compensation	0	0	2,519	0	0	2,519
Foreign currency translation adjustment	0	0	0	(1,034)	0	(1,034)
Net loss	$ 0	$ 0	0	0	(15,622)	(15,622)
Public offering of common stock, net (in shares)	0	1,511
Public offering of common stock, net	$ 0	$ 2	14,966	0	0	14,968
Stock options exercised, net of shares withheld for employee tax (in shares)	0	2
Stock options exercised, net of shares withheld for employee tax	$ 0	$ 0	8	0	0	8
Balance (in shares) at Mar. 31, 2021	0	26,787
Balance at Mar. 31, 2021	$ 0	$ 27	371,920	10,656	(104,131)	278,472
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	207
Issuance of restricted stock, net of shares withheld for employee tax	$ 0	$ 0	(141)	0	0	(141)
Share-based compensation	0	0	2,472	0	0	2,472
Foreign currency translation adjustment	0	0	0	(1,262)	0	(1,262)
Net loss	$ 0	$ 0	0	0	(16,062)	(16,062)
Balance (in shares) at Mar. 31, 2022	0	27,530
Balance at Mar. 31, 2022	$ 0	$ 27	$ 383,474	$ 14,809	$ (158,733)	$ 239,577

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating activities:
Net loss	$ (16,062)	$ (15,622)
Adjustments to reconcile net loss to net cash used in operating activities:
Provision for losses on accounts receivable	(1)	0
Lower of cost or market reserve adjustment to inventory	2,037	937
Depreciation and amortization	6,108	6,444
Amortization of debt issuance costs	211	221
Gain on disposal of assets	(39)	0
Share-based compensation	2,472	2,519
Unrealized foreign exchange gain	997	850
Changes in operating assets and liabilities:
Accounts receivable, trade	(223)	(4,528)
Notes receivable	6,986	(1,055)
Prepaid income tax	1	0
Inventories	(1,978)	2,844
Other current assets	(1,422)	(76)
Operating right of use asset	243	230
Accounts payable	(406)	(3,281)
Accrued liabilities	(2,271)	(4,449)
Lease liability	(256)	(248)
Net cash used in operating activities	(3,603)	(15,214)
Investing activities:
Purchase of property, plant and equipment	(1,022)	(2,212)
Proceeds from disposal of equipment	115	0
Deposits for equipment	(30)	(115)
Purchase of intangible assets	(114)	(95)
Net cash used in investing activities	(1,051)	(2,422)
Financing activities:
Principal payments of long-term debt and notes payable	(170)	(1,029)
Proceeds from line of credit borrowings	41,395	39,512
Repayments of line of credit borrowings	(39,062)	(26,320)
Proceeds from bank acceptance payable	9,686	4,772
Repayments of bank acceptance payable	(7,968)	(14,280)
Principal payments of financing lease	(5)	(4)
Exercise of stock options	0	8
Payments of tax withholding on behalf of employees related to share-based compensation	(140)	(258)
Proceeds from common stock offering, net	0	15,074
Net cash provided by financing activities	3,736	17,475
Effect of exchange rate changes on cash	(110)	(615)
Net decrease in cash, cash equivalents and restricted cash	(1,028)	(776)
Cash, cash equivalents and restricted cash at beginning of period	41,136	50,114
Cash, cash equivalents and restricted cash at end of period	40,108	49,338
Supplemental disclosure of cash flow information:
Interest, net of amounts capitalized	2,406	2,219
Non-cash investing and financing activities:
Net change in accounts payable related to property and equipment additions	19	(506)
Net change in deposits and prepaid for equipment related to property and equipment additions	$ 13	$ 47

Note 1 - Description of Busines

Note 1 - Description of Business	3 Months Ended
Note 1 - Description of Business	Mar. 31, 2022
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 March 31, 2022 December 31, 2021 three March 31, 2022 March 31, 2021 10 10 01 X 10 December 31, 2021 three March 31, 2022 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 statements and accompanying notes. Significant estimates and assumptions that impact these financial statements and the accompanying notes relate to, among other things, allowance for credit losses, inventory reserve, product warranty costs, share-based compensation expense, estimated useful lives of property and equipment, and taxes.

Note 2 - Significant Accounting

Note 2 - Significant Accounting Policies	3 Months Ended
Note 2 - Significant Accounting Policies	Mar. 31, 2022
Notes to Financial Statements
Significant Accounting Policies [Text Block]	Note 2. There have been no three March 31, 2022 2021 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	3 Months Ended
Note 3 - Revenue Recognition	Mar. 31, 2022
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 March 31, % of % of 2022 Revenue 2021 Revenue Data Center $ 21,415 41.0 % $ 25,939 52.2 % CATV 24,980 47.8 % 18,638 37.5 % Telecom 5,265 10.1 % 4,479 9.0 % FTTH 98 0.2 % 423 0.9 % Other 484 0.9 % 222 0.4 % Total Revenue $ 52,242 100.0 % $ 49,701 100.0 %

Note 4 - Leases

Note 4 - Leases	3 Months Ended
Note 4 - Leases	Mar. 31, 2022
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 The components of lease expense were as follows for the periods indicated (in thousands): Three months ended March 31, 2022 2021 Operating lease expense $ 306 $ 303 Financing lease expense 8 8 Short Term lease expense 3 9 Total lease expense $ 317 $ 320 Maturities of lease liabilities are as follows for the future one March 31, 2022 Operating Financing 2023 $ 1,280 $ 22 2024 1,268 60 2025 1,197 — 2026 1,218 — 2027 1,144 — 2028 and thereafter 2,540 — Total lease payments $ 8,647 $ 82 Less imputed interest (902 ) (5 ) Present value $ 7,745 $ 77 The weighted average remaining lease term and discount rate for operating leases were as follows for the periods indicated: Three months ended March 31, 2022 2021 Weighted Average Remaining Lease Term (Years) - operating leases 6.91 7.84 Weighted Average Remaining Lease Term (Years) - financing leases 1.58 2.58 Weighted Average Discount Rate - operating leases 3.22 % 3.23 % Weighted Average Discount Rate - financing leases 5.00 % 5.00 % Supplemental cash flow information related to operating leases was as follows for the periods indicated (in thousands): Three months ended March 31, 2022 2021 Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases 314 330 Operating cash flows from financing lease 1 1 Financing cash flows from financing lease 5 4

Note 5 - Cash, Cash Equivalents

Note 5 - Cash, Cash Equivalents and Restricted Cash	3 Months Ended
Note 5 - Cash, Cash Equivalents and Restricted Cash	Mar. 31, 2022
Notes to Financial Statements
Cash and Cash Equivalents Disclosure [Text Block]	Note 5. The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the statement of financial position that sum to the total of the same such amounts in the statement of cash flows (in thousands): March 31, December 31, 2022 2021 Cash and cash equivalents $ 31,980 $ 34,656 Restricted cash 8,128 6,480 Total cash, cash equivalents and restricted cash shown in the statement of cash flows $ 40,108 $ 41,136 Restricted cash includes guarantee deposits for customs duties, China government subsidy fund, and compensating balances required for certain credit facilities. As of March 31, 2022 December 31, 2021, March 31, 2022 December 31, 2021, March 31, 2022 December 31, 2021.

Note 6 - Earnings (Loss) Per Sh

Note 6 - Earnings (Loss) Per Share	3 Months Ended
Note 6 - Earnings (Loss) Per Share	Mar. 31, 2022
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 March 31, 2022 2021 Numerator: Net loss $ (16,062 ) $ (15,622 ) Denominator: Weighted average shares used to compute net loss per share Basic 27,463 26,438 Diluted 27,463 26,438 Net loss per share Basic $ (0.58) $ (0.59) Diluted $ (0.58) $ (0.59) 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 March 31, 2022 2021 Employee stock options — 13 Restricted stock units — 20 Shares for convertible senior notes 4,587 4,587 Total antidilutive shares 4,587 4,620

Note 7 - Inventories

Note 7 - Inventories	3 Months Ended
Note 7 - Inventories	Mar. 31, 2022
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): March 31, 2022 December 31, 2021 Raw materials $ 29,146 $ 29,469 Work in process and sub-assemblies 41,344 41,528 Finished goods 21,517 21,519 Total inventories $ 92,007 $ 92,516 The lower of cost or market adjustment expensed for inventory for the three March 31, 2022 2021 $2.0 million For the three March 31, 2022 2021 re $1.0 million and $6.0 million, respectively.

Note 8 - Property, Plant & Equi

Note 8 - Property, Plant & Equipment	3 Months Ended
Note 8 - Property, Plant & Equipment	Mar. 31, 2022
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): March 31, 2022 December 31, 2021 Land improvements $ 806 $ 806 Building and improvements 89,248 89,698 Machinery and equipment 264,554 266,386 Furniture and fixtures 5,639 5,658 Computer equipment and software 12,517 12,727 Transportation equipment 737 726 373,501 376,001 Less accumulated depreciation and amortization (171,505 ) (167,772 ) 201,996 208,229 Construction in progress 33,677 33,705 Land 1,101 1,101 Total property, plant and equipment, net $ 236,774 $ 243,035 For the three March 31, 2022 2021 s $6.0 million three March 31, 2022 2021 As of March 31, 2022 , 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

Note 9 - Intangible Assets, Net

Note 9 - Intangible Assets, Net	3 Months Ended
Note 9 - Intangible Assets, Net	Mar. 31, 2022
Notes to Financial Statements
Intangible Assets Disclosure [Text Block]	Note 9. Intangible assets consisted of the following for the periods indicated (in thousands): March 31, 2022 Gross Accumulated Intangible Amount amortization assets, net Patents $ 8,683 $ (4,910 ) $ 3,773 Trademarks 37 (18 ) 19 Total intangible assets $ 8,720 $ (4,928 ) $ 3,792 December 31, 2021 Gross Accumulated Intangible Amount amortization assets, net Patents $ 8,597 $ (4,779 ) $ 3,818 Trademarks 35 (17 ) 18 Total intangible assets $ 8,632 $ (4,796 ) $ 3,836 For the three March 31, 2022 2021 mately 6 At March 31, 2022 2023 $ 584 2024 584 2025 584 2026 584 2027 584 thereafter 872 $ 3,792

Note 10 - Fair Value of Financi

Note 10 - Fair Value of Financial Instruments	3 Months Ended
Note 10 - Fair Value of Financial Instruments	Mar. 31, 2022
Notes to Financial Statements
Fair Value Disclosures [Text Block]	Note 10. The following table represents a summary of the Company’s financial instruments measured at fair value on a recurring basis for the periods indicated (in thousands): As of March 31, 2022 As of December 31, 2021 (Level 1) (Level 2) (Level 3) Total (Level 1) (Level 2) (Level 3) Total Assets: Cash and cash equivalents $ 31,980 $ — $ — $ 31,980 $ 34,656 $ — $ — $ 34,656 Restricted cash 8,128 — — $ 8,128 6,480 — — $ 6,480 Note receivable — 1,195 — 1,195 — 8,148 — 8,148 Total assets $ 40,108 $ 1,195 $ — $ 41,303 $ 41,136 $ 8,148 $ — $ 49,284 Liabilities: Bank acceptance payable $ — $ 9,955 $ — $ 9,955 $ — $ 8,198 $ — 8,198 Convertible senior notes — 68,667 — 68,667 — 67,588 — 67,588 Total liabilities $ — $ 78,622 $ — $ 78,622 $ — $ 75,786 $ — $ 75,786 The carrying value amounts of accounts receivable, prepaid expenses and other current assets, accounts payable, accrued expenses and other current liabilities approximate fair value because of the short-term maturity of these instruments. The carrying value amounts of note receivable and bank acceptances approximate fair value due to the short-term nature of the debt since it renews frequently at current interest rates. 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 its convertible senior debt is measured for disclosure purpose. The fair value is based on observable market prices for this debt, which is traded in less active markets and are therefore classified as a Level 2

Note 11 - Notes Payable and Lon

Note 11 - Notes Payable and Long-term Debt	3 Months Ended
Note 11 - Notes Payable and Long-term Debt	Mar. 31, 2022
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): March 31, 2022 December 31, 2021 Revolving line of credit with a U.S. bank up to $ 20,000 1.56 April 15, 2023 $ 19,551 $ 14,373 Notes payable to a finance company due in monthly installments with 3.1 January 21, 2022 — 170 Revolving line of credit with a China bank up to $ 25,449 2.8 4.57 May 24, 2024 19,133 19,595 Credit facility with a China bank up to $ 14,125 2.6 4.5 January 5, 2024 10,988 13,044 Credit facility with a China bank up to $ 7,167 5.7 June 27, 2022 7,561 7,529 Sub-total 57,233 54,711 Less debt issuance costs, net (17 ) (22 ) Grand total 57,233 54,689 Less current portion (52,233 ) (49,689 ) Non-current portion $ 5,000 $ 5,000 Bank Acceptance Notes Payable Bank acceptance notes issued to vendors with a zero percent interest rate $ 9,955 $ 8,198 The current portion of long-term debt is the amount payable within one March 31, 2022 Maturities of long-term debt are as follows for the future one March 31, Within one year $ 52,233 Beyond one year 5,000 Total outstanding $ 57,233 On September 28, 2017, On December 29, 2021 , September 28, 2017, April 15, 2023. 1.56%, As of March 31, 2022 , the Company had $19.6 million of outstanding borrowings and was in compliance with all covenants On September 15, 2020, November 29, 2018 January 21, 2019 ( November 29, 2018 January 21, 2019 ( NT$22,311,381, not NT$159,027,448, September 21, 2020 January 21, 2022, not March 31, 2022 On May 24, 2019, five 180 May 7, 2019; April 30, 2019 May 8, 2019. may 5 may As of March 31, 2022 , $19.1 million was outstanding under the SPD Credit Line and the outstanding balance of bank acceptance notes issued to vendors was $2.2 million. On June 21, 2019, “¥100M ¥100M January 6, 2021, ¥100M three 3 January 5, 2024. may ¥100M June 21, 2019 January 5, 2024 ( “¥100M ¥100M may ¥100M s; however, draws under the ¥100M may ¥100M ¥100M As of March 31, 2022 , $11.0 million was outstanding under the ¥100M On June 21, 2019, three “¥50M ¥50M may ¥50M June 21, 2019 June 20, 2022 ( “¥50M ¥50M may ¥50M ¥50M may ¥50M March 31, 2022 , $7.6 million wa ¥50M As of March 31, 2022 December 31, 2021 $4.3 As of March 31, 2022 December 31, 2021 was $7.0 million and $5.4 million of restricted cash, investme

Note 12 - Convertible Senior No

Note 12 - Convertible Senior Notes	3 Months Ended
Note 12 - Convertible Senior Notes	Mar. 31, 2022
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): March 31, December 31, 2022 2021 Principal $ 80,500 $ 80,500 Unamortized debt issuance costs (1,616 ) (1,820 ) Net carrying amount $ 78,884 $ 78,680 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 there are no Holders may The Company was not 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 March 31, 2022 2021 Contractual interest expense $ 1,006 $ 1,006 Amortization of debt issuance costs 204 204 Total interest cost $ 1,210 $ 1,210 Effective interest rate 5.1 % 5.1 %

Note 13 - Accrued Liabilities

Note 13 - Accrued Liabilities	3 Months Ended
Note 13 - Accrued Liabilities	Mar. 31, 2022
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): March 31, 2022 December 31, 2021 Accrued payroll $ 6,157 $ 6,516 Accrued employee benefits 3,245 3,471 Accrued state and local taxes 973 1,897 Accrued interest 335 1,475 Advance payments 423 195 Accrued product warranty 171 263 Accrued commission expenses 1,024 1,003 Accrued professional fees 336 346 Accrued shipping and tariff expenses 19 33 Accrued other 554 388 Total accrued liabilities $ 13,237 $ 15,587

Note 14 - Other Income and Expe

Note 14 - Other Income and Expense	3 Months Ended
Note 14 - Other Income and Expense	Mar. 31, 2022
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 March 31, 2022 2021 Foreign exchange transaction loss $ (523 ) $ (208 ) Government subsidy income 18 39 Other non-operating gain 16 — Gain on disposal of assets 39 0 Total other expense, net $ (450 ) $ (169 )

Note 15 - Share-based Compensat

Note 15 - Share-based Compensation	3 Months Ended
Note 15 - Share-based Compensation	Mar. 31, 2022
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 2006 ● the 2013 “2013 ● the 2021 “2021 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 two first ten The following is a summary of option activity (in thousands, except per share data): 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, 2022 270 $ 10.32 $ 5.44 1.44 $ - Outstanding, March 31, 2022 270 10.32 5.44 - Exercisable, March 31, 2022 270 10.32 5.44 - Vested and expected to vest 270 10.32 5.44 - As of March 31, 2022 Performance Based Incentive Plan June 2021, three third first 2022. Restricted Stock Units/Awards The following is a summary of RSU/RSA activity, inclusive of performance based incentive plan (in thousands, except per share data): 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, 2022 2,170 $ 11.15 $ 11,156 Granted 24 3.95 96 Released (243 ) 3.84 935 Cancelled/Forfeited (53 ) 10.76 194 Outstanding, March 31, 2022 1,898 10.75 6,928 Vested and expected to vest 1,898 10.75 6,928 As of March 31, 2022 $17.9 million 2.3 years Share-Based Compensation Employee share-based compensation expenses recognized for the periods indicated (in thousands): Three months ended March 31, 2022 2021 Share-based compensation - by expense type Cost of goods sold $ 136 $ 201 Research and development 365 563 Sales and marketing 226 219 General and administrative 1,745 1,536 Total share-based compensation expense $ 2,472 $ 2,519

Note 16 - Income Taxes

Note 16 - Income Taxes	3 Months Ended
Note 16 - Income Taxes	Mar. 31, 2022
Notes to Financial Statements
Income Tax Disclosure [Text Block]	Note 16. The Company’s effective tax rate for the three March 31, 2022 2021 three March 31, 2022 2021, 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” March 31, 2022

Note 17 - Geographic Informatio

Note 17 - Geographic Information	3 Months Ended
Note 17 - Geographic Information	Mar. 31, 2022
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 March 31, 2022 2021 Revenues: United States $ 2,559 $ 3,316 Taiwan 27,779 26,395 China 21,904 19,990 $ 52,242 $ 49,701 As of the period ended March 31, December 31, 2022 2021 Long-lived assets: United States $ 85,756 $ 87,709 Taiwan 59,995 63,644 China 107,335 108,509 $ 253,086 $ 259,862

Note 18 - Contingencies

Note 18 - Contingencies	3 Months Ended
Note 18 - Contingencies	Mar. 31, 2022
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	Note 18. Litigation Overview From time to time, the Company may not Except for the lawsuits described bel ow, the Company believes that there are no Other Contingencies On August 9, 2021, 2016 2019, not not he additional tax assessment will be in the range of $0.2 million to $0.4 million including interest charges.

Note 19 - Subsequent Events

Note 19 - Subsequent Events	3 Months Ended
Note 19 - Subsequent Events	Mar. 31, 2022
Notes to Financial Statements
Subsequent Events [Text Block]	Note 19. The Company repaid its revolving bank line of credit with Truist Bank in the amount of $16.6 million in A 2022.

Significant Accounting Policies

Significant Accounting Policies (Policies)	3 Months Ended
Significant Accounting Policies (Policies)	Mar. 31, 2022
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)	3 Months Ended
Note 3 - Revenue Recognition (Tables)	Mar. 31, 2022
Notes Tables
Disaggregation of Revenue [Table Text Block]	Three months ended March 31, % of % of 2022 Revenue 2021 Revenue Data Center $ 21,415 41.0 % $ 25,939 52.2 % CATV 24,980 47.8 % 18,638 37.5 % Telecom 5,265 10.1 % 4,479 9.0 % FTTH 98 0.2 % 423 0.9 % Other 484 0.9 % 222 0.4 % Total Revenue $ 52,242 100.0 % $ 49,701 100.0 %

Note 4 - Leases (Tables)

Note 4 - Leases (Tables)	3 Months Ended
Note 4 - Leases (Tables)	Mar. 31, 2022
Notes Tables
Lease, Cost [Table Text Block]	Three months ended March 31, 2022 2021 Operating lease expense $ 306 $ 303 Financing lease expense 8 8 Short Term lease expense 3 9 Total lease expense $ 317 $ 320 Three months ended March 31, 2022 2021 Weighted Average Remaining Lease Term (Years) - operating leases 6.91 7.84 Weighted Average Remaining Lease Term (Years) - financing leases 1.58 2.58 Weighted Average Discount Rate - operating leases 3.22 % 3.23 % Weighted Average Discount Rate - financing leases 5.00 % 5.00 % Three months ended March 31, 2022 2021 Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases 314 330 Operating cash flows from financing lease 1 1 Financing cash flows from financing lease 5 4
Lessee, Operating and Finance Lease, Liability, Maturity [Table Text Block]	Operating Financing 2023 $ 1,280 $ 22 2024 1,268 60 2025 1,197 — 2026 1,218 — 2027 1,144 — 2028 and thereafter 2,540 — Total lease payments $ 8,647 $ 82 Less imputed interest (902 ) (5 ) Present value $ 7,745 $ 77

Note 5 - Cash, Cash Equivalen_2

Note 5 - Cash, Cash Equivalents and Restricted Cash (Tables)	3 Months Ended
	Mar. 31, 2022
Notes Tables
Schedule of Cash and Cash Equivalents [Table Text Block]	March 31, December 31, 2022 2021 Cash and cash equivalents $ 31,980 $ 34,656 Restricted cash 8,128 6,480 Total cash, cash equivalents and restricted cash shown in the statement of cash flows $ 40,108 $ 41,136

Note 6 - Earnings (Loss) Per _2

Note 6 - Earnings (Loss) Per Share (Tables)	3 Months Ended
Note 6 - Earnings (Loss) Per Share (Tables)	Mar. 31, 2022
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	Three months ended March 31, 2022 2021 Numerator: Net loss $ (16,062 ) $ (15,622 ) Denominator: Weighted average shares used to compute net loss per share Basic 27,463 26,438 Diluted 27,463 26,438 Net loss per share Basic $ (0.58) $ (0.59) Diluted $ (0.58) $ (0.59)
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]	Three months ended March 31, 2022 2021 Employee stock options — 13 Restricted stock units — 20 Shares for convertible senior notes 4,587 4,587 Total antidilutive shares 4,587 4,620

Note 7 - Inventories (Tables)

Note 7 - Inventories (Tables)	3 Months Ended
Note 7 - Inventories (Tables)	Mar. 31, 2022
Notes Tables
Schedule of Inventory, Current [Table Text Block]	March 31, 2022 December 31, 2021 Raw materials $ 29,146 $ 29,469 Work in process and sub-assemblies 41,344 41,528 Finished goods 21,517 21,519 Total inventories $ 92,007 $ 92,516

Note 8 - Property, Plant & Eq_2

Note 8 - Property, Plant & Equipment (Tables)	3 Months Ended
Note 8 - Property, Plant & Equipment (Tables)	Mar. 31, 2022
Notes Tables
Property, Plant and Equipment [Table Text Block]	March 31, 2022 December 31, 2021 Land improvements $ 806 $ 806 Building and improvements 89,248 89,698 Machinery and equipment 264,554 266,386 Furniture and fixtures 5,639 5,658 Computer equipment and software 12,517 12,727 Transportation equipment 737 726 373,501 376,001 Less accumulated depreciation and amortization (171,505 ) (167,772 ) 201,996 208,229 Construction in progress 33,677 33,705 Land 1,101 1,101 Total property, plant and equipment, net $ 236,774 $ 243,035

Note 9 - Intangible Assets, N_2

Note 9 - Intangible Assets, Net (Tables)	3 Months Ended
Note 9 - Intangible Assets, Net (Tables)	Mar. 31, 2022
Notes Tables
Schedule of Finite-Lived Intangible Assets [Table Text Block]	March 31, 2022 Gross Accumulated Intangible Amount amortization assets, net Patents $ 8,683 $ (4,910 ) $ 3,773 Trademarks 37 (18 ) 19 Total intangible assets $ 8,720 $ (4,928 ) $ 3,792 December 31, 2021 Gross Accumulated Intangible Amount amortization assets, net Patents $ 8,597 $ (4,779 ) $ 3,818 Trademarks 35 (17 ) 18 Total intangible assets $ 8,632 $ (4,796 ) $ 3,836
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	2023 $ 584 2024 584 2025 584 2026 584 2027 584 thereafter 872 $ 3,792

Note 10 - Fair Value of Finan_2

Note 10 - Fair Value of Financial Instruments (Tables)	3 Months Ended
Note 10 - Fair Value of Financial Instruments (Tables)	Mar. 31, 2022
Notes Tables
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	As of March 31, 2022 As of December 31, 2021 (Level 1) (Level 2) (Level 3) Total (Level 1) (Level 2) (Level 3) Total Assets: Cash and cash equivalents $ 31,980 $ — $ — $ 31,980 $ 34,656 $ — $ — $ 34,656 Restricted cash 8,128 — — $ 8,128 6,480 — — $ 6,480 Note receivable — 1,195 — 1,195 — 8,148 — 8,148 Total assets $ 40,108 $ 1,195 $ — $ 41,303 $ 41,136 $ 8,148 $ — $ 49,284 Liabilities: Bank acceptance payable $ — $ 9,955 $ — $ 9,955 $ — $ 8,198 $ — 8,198 Convertible senior notes — 68,667 — 68,667 — 67,588 — 67,588 Total liabilities $ — $ 78,622 $ — $ 78,622 $ — $ 75,786 $ — $ 75,786

Note 11 - Notes Payable and L_2

Note 11 - Notes Payable and Long-term Debt (Tables)	3 Months Ended
Note 11 - Notes Payable and Long-term Debt (Tables)	Mar. 31, 2022
Notes Tables
Schedule of Debt [Table Text Block]	March 31, 2022 December 31, 2021 Revolving line of credit with a U.S. bank up to $ 20,000 1.56 April 15, 2023 $ 19,551 $ 14,373 Notes payable to a finance company due in monthly installments with 3.1 January 21, 2022 — 170 Revolving line of credit with a China bank up to $ 25,449 2.8 4.57 May 24, 2024 19,133 19,595 Credit facility with a China bank up to $ 14,125 2.6 4.5 January 5, 2024 10,988 13,044 Credit facility with a China bank up to $ 7,167 5.7 June 27, 2022 7,561 7,529 Sub-total 57,233 54,711 Less debt issuance costs, net (17 ) (22 ) Grand total 57,233 54,689 Less current portion (52,233 ) (49,689 ) Non-current portion $ 5,000 $ 5,000 Bank Acceptance Notes Payable Bank acceptance notes issued to vendors with a zero percent interest rate $ 9,955 $ 8,198
Schedule of Maturities of Long-Term Debt [Table Text Block]	Within one year $ 52,233 Beyond one year 5,000 Total outstanding $ 57,233

Note 12 - Convertible Senior _2

Note 12 - Convertible Senior Notes (Tables)	3 Months Ended
Note 12 - Convertible Senior Notes (Tables)	Mar. 31, 2022
Notes Tables
Convertible Debt [Table Text Block]	March 31, December 31, 2022 2021 Principal $ 80,500 $ 80,500 Unamortized debt issuance costs (1,616 ) (1,820 ) Net carrying amount $ 78,884 $ 78,680
Interest Income and Interest Expense Disclosure [Table Text Block]	Three months ended March 31, 2022 2021 Contractual interest expense $ 1,006 $ 1,006 Amortization of debt issuance costs 204 204 Total interest cost $ 1,210 $ 1,210 Effective interest rate 5.1 % 5.1 %

Note 13 - Accrued Liabilities (

Note 13 - Accrued Liabilities (Tables)	3 Months Ended
Note 13 - Accrued Liabilities (Tables)	Mar. 31, 2022
Notes Tables
Schedule of Accrued Liabilities [Table Text Block]	March 31, 2022 December 31, 2021 Accrued payroll $ 6,157 $ 6,516 Accrued employee benefits 3,245 3,471 Accrued state and local taxes 973 1,897 Accrued interest 335 1,475 Advance payments 423 195 Accrued product warranty 171 263 Accrued commission expenses 1,024 1,003 Accrued professional fees 336 346 Accrued shipping and tariff expenses 19 33 Accrued other 554 388 Total accrued liabilities $ 13,237 $ 15,587

Note 14 - Other Income and Ex_2

Note 14 - Other Income and Expense (Tables)	3 Months Ended
Note 14 - Other Income and Expense (Tables)	Mar. 31, 2022
Notes Tables
Schedule of Other Nonoperating Income (Expense) [Table Text Block]	Three months ended March 31, 2022 2021 Foreign exchange transaction loss $ (523 ) $ (208 ) Government subsidy income 18 39 Other non-operating gain 16 — Gain on disposal of assets 39 0 Total other expense, net $ (450 ) $ (169 )

Note 15 - Share-based Compens_2

Note 15 - Share-based Compensation (Tables)	3 Months Ended
Note 15 - Share-based Compensation (Tables)	Mar. 31, 2022
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, 2022 270 $ 10.32 $ 5.44 1.44 $ - Outstanding, March 31, 2022 270 10.32 5.44 - Exercisable, March 31, 2022 270 10.32 5.44 - Vested and expected to vest 270 10.32 5.44 -
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, 2022 2,170 $ 11.15 $ 11,156 Granted 24 3.95 96 Released (243 ) 3.84 935 Cancelled/Forfeited (53 ) 10.76 194 Outstanding, March 31, 2022 1,898 10.75 6,928 Vested and expected to vest 1,898 10.75 6,928
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]	Three months ended March 31, 2022 2021 Share-based compensation - by expense type Cost of goods sold $ 136 $ 201 Research and development 365 563 Sales and marketing 226 219 General and administrative 1,745 1,536 Total share-based compensation expense $ 2,472 $ 2,519

Note 17 - Geographic Informat_2

Note 17 - Geographic Information (Tables)	3 Months Ended
Note 17 - Geographic Information (Tables)	Mar. 31, 2022
Notes Tables
Revenue from External Customers by Geographic Areas [Table Text Block]	Three months ended March 31, 2022 2021 Revenues: United States $ 2,559 $ 3,316 Taiwan 27,779 26,395 China 21,904 19,990 $ 52,242 $ 49,701
Long-Lived Assets by Geographic Areas [Table Text Block]	As of the period ended March 31, December 31, 2022 2021 Long-lived assets: United States $ 85,756 $ 87,709 Taiwan 59,995 63,644 China 107,335 108,509 $ 253,086 $ 259,862

Note 3 - Revenue Recognition -

Note 3 - Revenue Recognition - Revenue by Major Product Category (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue, net	$ 52,242	$ 49,701
Percent of Revenue	100.00%	100.00%
Data Center [Member]
Revenue, net	$ 21,415	$ 25,939
Percent of Revenue	41.00%	52.20%
CATV [Member]
Revenue, net	$ 24,980	$ 18,638
Percent of Revenue	47.80%	37.50%
Telecom [Member]
Revenue, net	$ 5,265	$ 4,479
Percent of Revenue	10.10%	9.00%
FTTH [Member]
Revenue, net	$ 98	$ 423
Percent of Revenue	0.20%	0.90%
Product and Service, Other [Member]
Revenue, net	$ 484	$ 222
Percent of Revenue	0.90%	0.40%

Note 4 - Leases - Components of

Note 4 - Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating lease expense	$ 306	$ 303
Financing lease expense	8	8
Short Term lease expense	3	9
Total lease expense	$ 317	$ 320
Weighted Average Remaining Lease Term (Years) - operating leases (Year)	6 years 10 months 28 days	7 years 10 months 2 days
Weighted Average Remaining Lease Term (Years) - financing leases (Year)	1 year 6 months 29 days	2 years 6 months 29 days
Weighted Average Discount Rate - operating leases	3.22%	3.23%
Weighted Average Discount Rate - financing leases	5.00%	5.00%
Operating cash flows from operating leases	$ 314	$ 330
Operating cash flows from financing lease	1	1
Financing cash flows from financing lease	$ 5	$ 4

Note 4 - Leases - Maturities of

Note 4 - Leases - Maturities of Lease Liabilities (Details) $ in Thousands	Mar. 31, 2022USD ($)
2023, Operating Lease	$ 1,280
2023, Financing Lease	22
2024, Operating Lease	1,268
2024, Financing Lease	60
2025, Operating Lease	1,197
2025, Financing Lease	0
2026, Operating Lease	1,218
2026, Financing Lease	0
2027, Operating Lease	1,144
2027, Financing Lease	0
2028 and thereafter, Operating Lease	2,540
2028 and thereafter, Financing Lease	0
Total operating lease payments	8,647
Total financing lease payments, finance leases	82
Less imputed interest, operating leases	(902)
Less imputed interest, financing leases	(5)
Present value, operating leases	7,745
Present value, financing leases	$ 77

Note 5 - Cash, Cash Equivalen_3

Note 5 - Cash, Cash Equivalents and Restricted Cash (Details Textual) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Restricted Cash and Cash Equivalents, Current, Total	$ 8,128	$ 6,480
CHINA
Certificates of Deposit, at Carrying Value	2,500	2,400
Bankers Acceptance [Member]
Restricted Cash and Cash Equivalents, Current, Total	4,500	3,000
Guarantee Deposits for Customs Duties [Member]
Restricted Cash and Cash Equivalents, Current, Total	$ 1,100	$ 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	Mar. 31, 2022	Dec. 31, 2021
Cash and cash equivalents	$ 31,980	$ 34,656
Restricted cash	8,128	6,480
Total cash, cash equivalents and restricted cash shown in the statement of cash flows	$ 40,108	$ 41,136

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
	Mar. 31, 2022	Mar. 31, 2021
Net loss	$ (16,062)	$ (15,622)
Basic (in shares)	27,463,321	26,438,071
Diluted (in shares)	27,463,321	26,438,071
Basic (in dollars per share)	$ (0.58)	$ (0.59)
Diluted (in dollars per share)	$ (0.58)	$ (0.59)

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
	Mar. 31, 2022	Mar. 31, 2021
Total antidilutive shares (in shares)	4,587	4,620
Share-Based Payment Arrangement, Option [Member]
Total antidilutive shares (in shares)		13
Restricted Stock Units (RSUs) [Member]
Total antidilutive shares (in shares)		20
Convertible Debt Securities [Member]
Total antidilutive shares (in shares)	4,587	4,587

Note 7 - Inventories (Details T

Note 7 - Inventories (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Inventory, LIFO Reserve, Period Charge	$ 2,037	$ 937
Inventory Write-down	$ 1,000	$ 6,000

Note 7 - Inventories - Inventor

Note 7 - Inventories - Inventories (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Raw materials	$ 29,146	$ 29,469
Work in process and sub-assemblies	41,344	41,528
Finished goods	21,517	21,519
Total inventories	$ 92,007	$ 92,516

Note 8 - Property, Plant & Eq_3

Note 8 - Property, Plant & Equipment (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Depreciation, Total	$ 6	$ 6.3
Interest Paid, Capitalized, Investing Activities	$ 0.1	$ 0.1

Note 8 - Property, Plant & Eq_4

Note 8 - Property, Plant & Equipment - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Property, plant and equipment, gross	$ 373,501	$ 376,001
Less accumulated depreciation and amortization	(171,505)	(167,772)
Property, plant and equipment, net before construction in progress and land	201,996	208,229
Property, plant and equipment, net	236,774	243,035
Land Improvements [Member]
Property, plant and equipment, gross	806	806
Building and Building Improvements [Member]
Property, plant and equipment, gross	89,248	89,698
Machinery and Equipment [Member]
Property, plant and equipment, gross	264,554	266,386
Furniture and Fixtures [Member]
Property, plant and equipment, gross	5,639	5,658
Computer Equipment and Software [Member]
Property, plant and equipment, gross	12,517	12,727
Vehicles [Member]
Property, plant and equipment, gross	737	726
Construction in Progress [Member]
Property, plant and equipment, net	33,677	33,705
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
	Mar. 31, 2022	Mar. 31, 2021
Amortization of Intangible Assets, Total	$ 0.1	$ 0.1
Finite-Lived Intangible Assets, Remaining Amortization Period (Year)	6 years

Note 9 - Intangible Assets, N_4

Note 9 - Intangible Assets, Net - Finite-lived Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Intangible assets, gross amount	$ 8,720	$ 8,632
Intangible assets, accumulated amortization	(4,928)	(4,796)
Intangible assets, net	3,792	3,836
Patents [Member]
Intangible assets, gross amount	8,683	8,597
Intangible assets, accumulated amortization	(4,910)	(4,779)
Intangible assets, net	3,773	3,818
Trademarks [Member]
Intangible assets, gross amount	37	35
Intangible assets, accumulated amortization	(18)	(17)
Intangible assets, net	$ 19	$ 18

Note 9 - Intangible Assets, N_5

Note 9 - Intangible Assets, Net - Future Amortization Expense (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
2023	$ 584
2024	584
2025	584
2026	584
2027	584
thereafter	872
Finite-Lived Intangible Assets, Net, Ending Balance	$ 3,792	$ 3,836

Note 10 - Fair Value of Finan_3

Note 10 - Fair Value of Financial Instruments - Financial Instruments Measured at Fair Value on a Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Cash and cash equivalents	$ 31,980	$ 34,656
Restricted cash	8,128	6,480
Note receivable	1,195	8,148
Total assets	(41,303)	(49,284)
Bank acceptance payable	9,955	8,198
Convertible senior notes	68,667	67,588
Total liabilities	78,622	75,786
Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalents	31,980	34,656
Restricted cash	8,128	6,480
Note receivable	0	0
Total assets	(40,108)	(41,136)
Bank acceptance payable	0	0
Convertible senior notes	0	0
Total liabilities	0	0
Fair Value, Inputs, Level 2 [Member]
Cash and cash equivalents	0	0
Restricted cash	0	0
Note receivable	1,195	8,148
Total assets	(1,195)	(8,148)
Bank acceptance payable	9,955	8,198
Convertible senior notes	68,667	67,588
Total liabilities	78,622	75,786
Fair Value, Inputs, Level 3 [Member]
Cash and cash equivalents	0	0
Restricted cash	0	0
Note receivable	0	0
Total assets	0	0
Bank acceptance payable	0	0
Convertible senior notes	0	0
Total liabilities	$ 0	$ 0

Note 11 - Notes Payable and L_3

Note 11 - Notes Payable and Long-term Debt (Details Textual) $ in Thousands

Jan. 21, 2022USD ($)

Jan. 21, 2022TWD ($)

Dec. 29, 2021USD ($)

Sep. 15, 2020USD ($)

Sep. 15, 2020TWD ($)

Jun. 21, 2019USD ($)

May 24, 2019USD ($)

Mar. 31, 2022USD ($)

Mar. 31, 2021USD ($)

Dec. 31, 2021USD ($)

Apr. 05, 2021USD ($)

Jun. 21, 2019CNY (¥)

May 24, 2019CNY (¥)

May 08, 2019USD ($)

May 07, 2019CNY (¥)

Apr. 30, 2019CNY (¥)

Payments to Acquire Property, Plant, and Equipment, Total

$ 1,022

$ 2,212

Finance Lease, Principal Payments

$ 4

Debt Instrument, Unused Borrowing Capacity, Amount

4,300

$ 7,400

Cash Collateral for Borrowed Securities

7,000

5,400

Chailease Finance Co, Ltd. [Member] | Prime World International Holdings, Ltd. (“Prime World”) [Member]

Payments to Acquire Property, Plant, and Equipment, Total

$ 800

$ 22,311,381

Chailease Finance Co, Ltd. [Member] | Prime World International Holdings, Ltd. (“Prime World”) [Member] | Promissory Note [Member]

Finance Lease, Principal Payments

$ 5,500

Chailease Finance Co, Ltd. [Member] | Prime World International Holdings, Ltd. (“Prime World”) [Member] | Second Sales Contract [Member]

Finance Lease, Principal Payments

$ 159,027,448

Revolving Credit Facility [Member] | Truist Bank [Member]

Line of Credit Facility, Maximum Borrowing Capacity

$ 20,000

Long-term Line of Credit, Total

$ 19,600

Revolving Credit Facility [Member] | Truist Bank [Member] | Secured Overnight Financing Rate (SOFR) [Member]

Debt Instrument, Basis Spread on Variable Rate

1.56%

Debt Instrument, SOFR Floor

0.75%

Revolving Credit Facility [Member] | SPD Bank [Member]

Line of Credit Facility, Maximum Borrowing Capacity

25,449

Revolving Credit Facility [Member] | SPD Bank [Member] | Global Technology, Inc. [Member] | The SPD Credit Line [Member]

Line of Credit Facility, Maximum Borrowing Capacity

$ 25,400

¥ 180,000,000

Long-term Line of Credit, Total

19,100

Debt Instrument, Term (Year)

5 years

Bank Acceptances Executed

2,200

Revolving Credit Facility [Member] | SPD Bank [Member] | Global Technology, Inc. [Member] | The SPD 30M Credit Facility [Member]

Line of Credit Facility, Maximum Borrowing Capacity | ¥

¥ 30,000,000

Revolving Credit Facility [Member] | SPD Bank [Member] | Global Technology, Inc. [Member] | The SPD 9.9M Credit Facility [Member]

Line of Credit Facility, Maximum Borrowing Capacity | ¥

¥ 9,900,000

Revolving Credit Facility [Member] | SPD Bank [Member] | Global Technology, Inc. [Member] | The SPD 2.0M Credit Facility [Member]

Line of Credit Facility, Maximum Borrowing Capacity

$ 2,000

Revolving Credit Facility [Member] | China Zheshang Bank Co., Ltd [Member] | The ¥100M Credit Facility [Member]

Line of Credit Facility, Maximum Borrowing Capacity

14,125

Revolving Credit Facility [Member] | China Zheshang Bank Co., Ltd [Member] | The ¥50M Credit Facility [Member]

Line of Credit Facility, Maximum Borrowing Capacity

7,167

$ 7,167

Revolving Credit Facility [Member] | China Zheshang Bank Co., Ltd [Member] | Global Technology, Inc. [Member] | The ¥100M Credit Facility [Member]

Line of Credit Facility, Maximum Borrowing Capacity

$ 14,100

¥ 100,000,000

Long-term Line of Credit, Total

11,000

Debt Instrument, Term (Year)

18 months

Bank Acceptances Executed

7,700

Revolving Credit Facility [Member] | China Zheshang Bank Co., Ltd [Member] | Global Technology, Inc. [Member] | The ¥50M Credit Facility [Member]

Line of Credit Facility, Maximum Borrowing Capacity

$ 7,100

¥ 50,000,000

Long-term Line of Credit, Total

$ 7,600

Debt Instrument, Term (Year)

3 years

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	Mar. 31, 2022	Dec. 31, 2021
Long-term debt	$ 57,233	$ 54,711
Less debt issuance costs, net	17	22
Grand total	57,233	54,689
Less current portion	52,233	49,689
Non-current portion	5,000	5,000
Bank acceptance notes issued to vendors with a zero percent interest rate	9,955	8,198
Chailease Finance Co, Ltd. [Member] \| Promissory Note [Member]
Long-term debt	0	170
Revolving Credit Facility [Member] \| Truist Bank [Member] \| Secured Overnight Financing Rate (SOFR) [Member] \| Sixth Amendment to Loan Agreement with Truist Bank [Member]
Long-term debt	19,551	14,373
Revolving Credit Facility [Member] \| SPD Bank [Member]
Long-term debt	19,133	19,595
Revolving Credit Facility [Member] \| China Zheshang Bank Co., Ltd [Member] \| The ¥100M Credit Facility [Member]
Long-term debt	10,988	13,044
Revolving Credit Facility [Member] \| China Zheshang Bank Co., Ltd [Member] \| The ¥50M Credit Facility [Member]
Long-term debt	$ 7,561	$ 7,529

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) - USD ($) $ in Thousands	Dec. 29, 2021	Mar. 31, 2022	Dec. 31, 2021	Apr. 05, 2021
Chailease Finance Co, Ltd. [Member] \| Promissory Note [Member]
Long-term debt, maturity date		Jan. 21, 2022	Jan. 21, 2022
Long-term debt, interest		3.10%	3.10%
Revolving Credit Facility [Member] \| Truist Bank [Member]
Long-term debt, maximum (USD)				$ 20,000
Revolving Credit Facility [Member] \| Truist Bank [Member] \| Secured Overnight Financing Rate (SOFR) [Member]
Long-term debt, interest	1.56%
Revolving Credit Facility [Member] \| Truist Bank [Member] \| Secured Overnight Financing Rate (SOFR) [Member] \| Sixth Amendment to Loan Agreement with Truist Bank [Member]
Long-term debt, maximum (USD)		$ 20,000	$ 20,000
Long-term debt, interest		1.56%	1.56%
Long-term debt, maturity date		Apr. 15, 2023	Apr. 15, 2023
Revolving Credit Facility [Member] \| SPD Bank [Member]
Long-term debt, maximum (USD)		$ 25,449	$ 25,449
Long-term debt, maturity date		May 24, 2024	May 24, 2024
Revolving Credit Facility [Member] \| SPD Bank [Member] \| Minimum [Member]
Long-term debt, interest		2.80%	2.80%
Revolving Credit Facility [Member] \| SPD Bank [Member] \| Maximum [Member]
Long-term debt, interest		4.57%	4.57%
Revolving Credit Facility [Member] \| China Zheshang Bank Co., Ltd [Member] \| The ¥100M Credit Facility [Member]
Long-term debt, maximum (USD)		$ 14,125	$ 14,125
Long-term debt, maturity date		Jan. 5, 2024	Jan. 5, 2024
Revolving Credit Facility [Member] \| China Zheshang Bank Co., Ltd [Member] \| The ¥100M Credit Facility [Member] \| Minimum [Member]
Long-term debt, interest		2.60%	2.60%
Revolving Credit Facility [Member] \| China Zheshang Bank Co., Ltd [Member] \| The ¥100M Credit Facility [Member] \| Maximum [Member]
Long-term debt, interest		4.50%	4.50%
Revolving Credit Facility [Member] \| China Zheshang Bank Co., Ltd [Member] \| The ¥50M Credit Facility [Member]
Long-term debt, maximum (USD)		$ 7,167	$ 7,167
Long-term debt, maturity date		Jun. 27, 2022	Jun. 27, 2022
Long-term debt, interest		5.70%	5.70%

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	Mar. 31, 2022	Dec. 31, 2021
Within one year	$ 52,233
Beyond one year	5,000
Total outstanding	$ 57,233	$ 54,689

Note 12 - Convertible Senior _3

Note 12 - Convertible Senior Notes (Details Textual) - USD ($)	Mar. 05, 2019	Mar. 31, 2022	Dec. 31, 2021
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	5.00%
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	30.00%
Share Price (in dollars per share)	$ 13.50
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger	130.00%
Debt Instrument, Convertible, Threshold Trading Days	20
Debt Instrument, Convertible, Threshold Consecutive Trading Days	30
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed	100.00%
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) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 05, 2019
Net carrying amount	$ 78,884	$ 78,680
The 5% Convertible Senior Notes Due 2024 [Member]
Principal	80,500	80,500	$ 80,500
Unamortized debt issuance costs	(1,616)	(1,820)
Net carrying amount	$ 78,884	$ 78,680

Note 12 - Convertible Senior _5

Note 12 - Convertible Senior Notes - Schedule of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Amortization of debt issuance costs	$ 211	$ 221
The 5% Convertible Senior Notes Due 2024 [Member]
Contractual interest expense	1,006	1,006
Amortization of debt issuance costs	204	204
Total interest cost	$ 1,210	$ 1,210
Effective interest rate	5.10%	5.10%

Note 13 - Accrued Liabilities -

Note 13 - Accrued Liabilities - Accrued Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Accrued payroll	$ 6,157	$ 6,516
Accrued employee benefits	3,245	3,471
Accrued state and local taxes	973	1,897
Accrued interest	335	1,475
Advance payments	423	195
Accrued product warranty	171	263
Accrued commission expenses	1,024	1,003
Accrued professional fees	336	346
Accrued shipping and tariff expenses	19	33
Accrued other	554	388
Total accrued liabilities	$ 13,237	$ 15,587

Note 14 - Other Income and Ex_3

Note 14 - Other Income and Expense - Other Income and Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Foreign exchange transaction loss	$ (523)	$ (208)
Government subsidy income	18	39
Other non-operating gain	16	0
Gain on disposal of assets	39	0
Total other expense, net	$ (450)	$ (169)

Note 15 - Share-based Compens_3

Note 15 - Share-based Compensation (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount	$ 0
Share-Based Payment Arrangement, Expense	$ 2,472	$ 2,519
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	25.00%
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	$ 300
Performance Shares [Member] \| Minimum [Member]
SharebasedCompensationArrangementBySharebasedPaymentAwardPerformanceAwardValuePercentageOfBasedAmount	0.00%
Performance Shares [Member] \| Maximum [Member]
SharebasedCompensationArrangementBySharebasedPaymentAwardPerformanceAwardValuePercentageOfBasedAmount	200.00%
Performance Shares [Member] \| Vesting on the Third Anniversary [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	100.00%
Restricted Stock Awards and Restricted Stock Units [Member]
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total	$ 17,900
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)	2 years 3 months 18 days

Note 15 - Share-based Compens_4

Note 15 - Share-based Compensation - Option Activity (Details) - $ / shares shares in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Outstanding, number of shares (in shares)	270
Outstanding, weighted average exercise price (in dollars per share)	$ 10.32
Outstanding, weighted average fair value (in dollars per share)	$ 5.44	$ 5.44
Outstanding, weighted average remaining contractual life (Year)		1 year 5 months 8 days
Outstanding, number of shares (in shares)	270	270
Outstanding, weighted average exercise price (in dollars per share)	$ 10.32	$ 10.32
Exercisable, number of shares (in shares)	270
Exercisable, weighted average exercise price (in dollars per share)	$ 10.32
Exercisable, weighted average fair value (in dollars per share)	$ 5.44
Vested and expected to vest, number of shares (in shares)	270
Vested and expected to vest, weighted average exercise price (in dollars per share)	$ 10.32
Vested and expected to vest, weighted average fair value (in dollars per share)	$ 5.44

Note 15 - Share-based Compens_5

Note 15 - Share-based Compensation - Restricted Stock Unit/Awards Activity (Details) - Restricted Stock Units (RSUs) [Member] $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022USD ($)$ / sharesshares
Outstanding, number of shares (in shares) \| shares	2,170
Outstanding, weighted average fair value (in dollars per share)	$ 11.15
Outstanding, aggregate intrinsic value \| $	$ 11,156
Granted, number of shares (in shares) \| shares	24
Granted, weighted average fair value (in dollars per share)	$ 3.95
Granted, aggregate intrinsic value \| $	$ 96
Released, number of shares (in shares) \| shares	(243)
Released, weighted average share price on date of release (in dollars per share)
Released, weighted average fair value (in dollars per share)	$ 3.84
Released, aggregate intrinsic value \| $	$ 935
Cancelled/Forfeited, number of shares (in shares) \| shares	(53)
Cancelled/Forfeited, weighted average fair value (in dollars per share)	$ 10.76
Cancelled/Forfeited, aggregate intrinsic value \| $	$ 194
Outstanding, number of shares (in shares) \| shares	1,898
Outstanding, weighted average fair value (in dollars per share)	$ 10.75
Outstanding, aggregate intrinsic value \| $	$ 6,928
Vested and expected to vest, number of shares (in shares) \| shares	1,898
Vested and expected to vest, weighted average fair value (in dollars per share)	$ 10.75
Vested and expected to vest, aggregate intrinsic value \| $	$ 6,928

Note 15 - Share-based Compens_6

Note 15 - Share-based Compensation - Share-based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Total share-based compensation expense	$ 2,472	$ 2,519
Cost of Sales [Member]
Total share-based compensation expense	136	201
Research and Development Expense [Member]
Total share-based compensation expense	365	563
Selling and Marketing Expense [Member]
Total share-based compensation expense	226	219
General and Administrative Expense [Member]
Total share-based compensation expense	$ 1,745	$ 1,536

Note 16 - Income Taxes (Details

Note 16 - Income Taxes (Details Textual)	3 Months Ended
Note 16 - Income Taxes (Details Textual)	Mar. 31, 2022	Mar. 31, 2021
Effective Income Tax Rate Reconciliation, Percent, Total	0.00%	0.00%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%

Note 17 - Geographic Informat_3

Note 17 - Geographic Information (Details Textual)	3 Months Ended
Note 17 - Geographic Information (Details Textual)	Mar. 31, 2022
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
	Mar. 31, 2022	Mar. 31, 2021
Revenue, net	$ 52,242	$ 49,701
UNITED STATES
Revenue, net	2,559	3,316
TAIWAN
Revenue, net	27,779	26,395
CHINA
Revenue, net	$ 21,904	$ 19,990

Note 17 - Geographic Informat_5

Note 17 - Geographic Information - Asset Information by Geographic Region (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Long-lived assets	$ 253,086	$ 259,862
UNITED STATES
Long-lived assets	85,756	87,709
TAIWAN
Long-lived assets	59,995	63,644
CHINA
Long-lived assets	$ 107,335	$ 108,509

Note 18 - Contingencies (Detail

Note 18 - Contingencies (Details Textual) - Loss Contingency, Obligation for Sales and Use Tax [Member] $ in Millions	Aug. 09, 2021USD ($)
Loss Contingency, Potential Obligation	$ 1
Loss Contingency Accrual, Payments	0.4
Minimum [Member]
Loss Contingency, Estimate of Possible Loss	0.2
Maximum [Member]
Loss Contingency, Estimate of Possible Loss	$ 0.4

Note 19 - Subsequent Events (De

Note 19 - Subsequent Events (Details Textual) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Apr. 30, 2022	Mar. 31, 2022	Mar. 31, 2021
Repayments of Lines of Credit		$ 39,062	$ 26,320
Subsequent Event [Member] \| Revolving Credit Facility [Member] \| Truist Bank [Member]
Repayments of Lines of Credit	$ 16,600