Applied Optoelectronics (AAOI) 10-K 28 Feb 20 2019 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2019	Feb. 20, 2020	Jun. 30, 2019
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	FY
Document Fiscal Year Focus	2019
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2019
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 Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 160,183,854
Entity Common Stock, Shares Outstanding		20,231,435

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current Assets
Cash and cash equivalents	$ 59,977	$ 55,646
Restricted cash	7,051	2,358
Accounts receivable - trade, net of allowance of $30 and $32, respectively	34,655	30,534
Inventories	85,028	93,256
Prepaid income tax	224	1,188
Prepaid expenses and other current assets	5,869	11,293
Total current assets	192,804	194,275
Property, plant and equipment, net	248,444	234,211
Land use rights, net	5,598	5,814
Operating right of use asset	7,768	0
Financing right of use asset	119	0
Intangible assets, net	4,081	3,977
Deferred income tax assets	7,287	21,714
Other assets, net	724	6,849
TOTAL ASSETS	466,825	466,840
Current liabilities
Current portion of notes payable and long-term debt	33,371	23,589
Accounts payable	32,828	29,910
Bank acceptance payable	6,310	4,628
Current lease liability - operating	965	0
Current lease liability - financing	17	0
Accrued liabilities	17,864	19,291
Total current liabilities	91,355	77,418
Notes payable and long-term debt, less current portion	16,552	60,328
Net carrying amount	77,041	0
Non-current lease liability - operating	7,983	0
Non-current lease liability - financing	100	0
TOTAL LIABILITIES	193,031	137,746
Stockholders' equity:
Preferred Stock; 5,000 shares authorized at $0.001 par value; no shares issued and outstanding at December 31, 2019 and December 31, 2018, respectively	0	0
Common Stock; 45,000 shares authorized at $0.001 par value; 20,140 and 19,810 shares issued and outstanding at December 31, 2019 and December 31, 2018, respectively	20	20
Additional paid-in capital	303,401	292,480
Accumulated other comprehensive income	430	602
Retained earnings (Accumulated deficit)	(30,057)	35,992
TOTAL STOCKHOLDERS' EQUITY	273,794	329,094
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 466,825	$ 466,840

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Accounts receivable, allowance	$ 30	$ 32
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
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)	45,000,000	45,000,000
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares issued (in shares)	20,140,000	19,810,000
Common stock, shares outstanding (in shares)	20,140,000	19,810,000

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue, net	$ 190,872	$ 267,465	$ 382,329
Cost of goods sold	144,671	179,692	216,049
Gross profit	46,201	87,773	166,280
Operating expenses
Research and development	43,399	49,903	35,365
Sales and marketing	10,060	9,141	8,702
General and administrative	41,489	39,497	35,262
Total operating expenses	94,948	98,541	79,329
Income (loss) from operations	(48,747)	(10,768)	86,951
Other income (expense)
Interest income	925	282	221
Interest expense	(5,405)	(1,106)	(858)
Other income, net	1,840	1,814	(1,788)
Total other income (expense), net	(2,640)	990	(2,425)
Income (loss) before income taxes	(51,387)	(9,778)	84,526
Income tax benefit (expense)	(14,662)	7,632	(10,575)
Net income (loss)	$ (66,049)	$ (2,146)	$ 73,951
Net income (loss) per share
Basic (in dollars per share)	$ (3.31)	$ (0.11)	$ 3.87
Diluted (in dollars per share)	$ (3.31)	$ (0.11)	$ 3.67
Weighted average shares used to compute net income (loss) per share:
Basic (in shares)	19,982,363	19,646,646	19,097,355
Diluted (in shares)	19,982,363	19,646,646	20,139,105

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net income (loss)	$ (66,049)	$ (2,146)	$ 73,951
Loss on foreign currency translation adjustment	(172)	(9,141)	10,628
Comprehensive loss	$ (66,221)	$ (11,287)	$ 84,579

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - 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, 2016	0	18,400
Balance at Dec. 31, 2016	$ 0	$ 18	$ 265,264	$ (885)	$ (37,013)	$ 227,384
Public offering of common stock, net (in shares)	0	459
Public offering of common stock, net	$ 0	$ 1	21,571	0	0	21,572
Stock options exercised, net of shares withheld for employee tax (in shares)	0	418
Stock options exercised, net of shares withheld for employee tax	$ 0	$ 0	(6,623)	0	0	(6,623)
Issuance of restricted stock, net of shares withheld for employee tax (in shares)	0	174
Issuance of restricted stock, net of shares withheld for employee tax	$ 0	$ 0	(2,631)	0	0	(2,631)
Share-based compensation	0	0	7,795	0	0	7,795
Cumulative effect of previously unrecognized tax benefits	0	0	0	0	1,200	1,200
Net income (loss)	0	0	0	0	73,951	73,951
Foreign currency translation adjustment	$ 0	$ 0		10,628	0	10,628
Balance (in shares) at Dec. 31, 2017	0	19,451
Balance at Dec. 31, 2017	$ 0	$ 19	285,376	9,743	38,138	333,276
Stock options exercised, net of shares withheld for employee tax (in shares)	0	121
Stock options exercised, net of shares withheld for employee tax	$ 0	$ 0	(2,073)	0	0	(2,073)
Issuance of restricted stock, net of shares withheld for employee tax (in shares)	0	238
Issuance of restricted stock, net of shares withheld for employee tax	$ 0	$ 1	(1,943)	0	0	(1,942)
Share-based compensation	0	0	11,120	0	0	11,120
Cumulative effect of previously unrecognized tax benefits	0	$ 0	0	(9,141)	0	(9,141)
Net income (loss)	$ 0		0		(2,146)	(2,146)
Balance (in shares) at Dec. 31, 2018	0	19,810
Balance at Dec. 31, 2018	$ 0	$ 20	292,480	602	35,992	$ 329,094
Stock options exercised, net of shares withheld for employee tax (in shares)	0	3				4
Stock options exercised, net of shares withheld for employee tax	$ 0	$ 0	14	0	0	$ 14
Issuance of restricted stock, net of shares withheld for employee tax (in shares)	0	327
Issuance of restricted stock, net of shares withheld for employee tax	$ 0	$ 0	(897)	0	0	(897)
Share-based compensation	0	0	11,804	0	0	11,804
Net income (loss)	0	0	0	0	(66,049)	(66,049)
Foreign currency translation adjustment	$ 0	$ 0	0	(172)	0	(172)
Balance (in shares) at Dec. 31, 2019	0	20,140
Balance at Dec. 31, 2019	$ 0	$ 20	$ 303,401	$ 430	$ (30,057)	$ 273,794

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating activities:
Net income (loss)	$ (66,049)	$ (2,146)	$ 73,951
Adjustments to reconcile net income to net cash provided by operating activities:
Lower of cost or market reserve adjustment to inventory	6,774	7,166	1,866
Depreciation and amortization	24,014	29,698	20,381
Amortization of debt issuance costs	892	42	81
Deferred income taxes, net	14,570	(8,964)	(114)
Loss on disposal of assets	13	7	97
Share-based compensation	11,804	11,120	7,795
Unrealized foreign exchange gain (loss)	(245)	(548)	330
Changes in operating assets and liabilities:
Accounts receivable, trade	(4,355)	29,316	(10,080)
Prepaid income tax	961	230	(1,386)
Inventories	1,560	(28,403)	(21,876)
Other current assets	5,514	(2,939)	(4,266)
Operating right of use asset	847	0	0
Accounts payable	3,150	(13,714)	7,249
Accrued income taxes	0	(7,390)	6,204
Accrued liabilities	(308)	554	4,052
Lease liability	(896)	0	0
Net cash provided (used in) by operating activities	(1,754)	14,029	84,284
Investing activities:
Maturities of short-term investments	0	36	8
Purchase of property, plant and equipment	(28,789)	(71,854)	(66,968)
Purchase of land use rights	0	(5,591)	0
Proceeds from disposal of equipment	1	697	171
Deposits and prepaid for equipment	(2,688)	674	(2,871)
Purchase of intangible assets	(640)	(476)	(499)
Net cash used in investing activities	(32,116)	(76,514)	(70,159)
Financing activities:
Proceeds from issuance of notes payable and long-term debt, net of debt issuance costs	13,661	47,849	0
Principal payments of long-term debt and notes payable	(43,363)	(3,133)	(42,758)
Proceeds from line of credit borrowings	83,434	155,078	88,003
Repayments of line of credit borrowings	(88,299)	(165,569)	(39,003)
Proceeds from bank acceptance payable	13,638	4,595	0
Repayments of bank acceptance payable	(11,952)	0	(309)
Proceeds from issuance of convertible senior notes, net of debt issuance costs	76,362	0	0
Principal payments of financing lease	(2)
Exercise of stock options	14	120	1,460
Payments of tax withholding on behalf of employees related to share-based compensation	(897)	(4,137)	(10,721)
Proceeds from common stock offering, net	0	0	21,572
Net cash provided by financing activities	42,596	34,803	18,244
Effect of exchange rate changes on cash	298	1,738	(385)
Net increase (decrease) in cash, cash equivalents and restricted cash	9,024	(25,944)	31,984
Cash, cash equivalents and restricted cash at beginning of period	58,004	83,948	51,964
Cash, cash equivalents and restricted cash at end of period	67,028	58,004	83,948
Supplemental disclosure of cash flow information:
Interest	3,172	848	872
Income taxes	(890)	8,470	5,835
Non-cash investing and financing activities:
Net change in accounts payable related to property and equipment additions	(3,869)	(1,151)	4,582
Net change in deposits and prepaid for equipment related to property and equipment additions	$ 8,801	$ 0	$ 0

Note A - Organization and Opera

Note A - Organization and Operations	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Business Description and Basis of Presentation [Text Block]	NOTE A—ORGANIZATION AND OPERATIONS Applied Optoelectronics, Inc. (“AOI” or the “Company”) was incorporated in the State of Texas on February 28, 1997. March 2013, four The Company has manufacturing and research and development facilities located in the U.S., Taiwan and China. 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. 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 is 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 and transceivers, as well as Cable TV Broadband (“CATV”) systems and equipment, and performs research and development activities for the CATV products. Prime World also operates a branch in Taiwan, which primarily manufactures transceivers. The Company also has a research and development center in Duluth, Georgia.

Note B - Summary of Significant

Note B - Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Significant Accounting Policies [Text Block]	NOTE B—SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES 1. Basis of Presentation The consolidated financial statements include the accounts of the Company and all of its wholly-owned subsidiaries and are prepared in accordance with accounting principles generally accepted in the United States of America (GAAP). All intercompany balances and transactions have been eliminated in consolidation. 2. 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 relate to, among other things, allowance for doubtful accounts, inventory reserve, product warranty costs, share-based compensation expense, estimated useful lives of property and equipment, and taxes. 3. Foreign Currency Translation The functional currency for the Company’s foreign operations is the local currency. The assets and liabilities of these operations are translated at the rate of exchange in effect on the balance sheet date and sales and expenses are translated at monthly average rates. The resulting gains or losses from translation are included in a separate component of other comprehensive income. There is no 4. Fair Value The carrying value of cash, cash equivalents and short-term investments, accounts receivable, accounts payable, and note receivable approximate their historical fair values due to their short-term maturities. The carrying value of the debt approximates its fair value due to the short-term nature of the debt since it renews frequently at current interest rates. Management believes that the interest rates in effect at each year end represent the current market rates for similar borrowings. The fair value measurement standard defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The standard characterizes inputs used in determining fair value according to a hierarchy that prioritized inputs based on the degree to which they are observable. The three Level 1—Inputs Level 2—Inputs 1 not Level 3—Inputs not Assets and liabilities that are required to be fair valued on a recurring basis include money market funds, marketable securities, equity instruments and contingent consideration. Money market funds are valued with Level 1 5. Cash and Cash Equivalents The Company considers all highly liquid securities with an original maturity of ninety Cash in foreign accounts was approximately $15.1 million and $8.0 million at December 31, 2019 and 2018 , respectively. The Company maintains cash and cash equivalents at U.S. financial institutions for which the combined account balances in individual institutions may December 31, 2019 not not not 6. Restricted Cash/Compensating Balances Restricted cash includes guarantee deposits for customs duties and compensating balances associated with credit facilities. 7. Accounts Receivable/Allowance for Doubtful Accounts The Company carries its accounts receivable at the net amount that it estimates to be collectible. An allowance for uncollectable accounts is maintained through a charge against operations. The allowance is determined by management review of outstanding amounts per customer, historical payments and the aging of accounts. 8. Concentration of Credit Risk and Significant Customers Financial instruments which potentially subject the Company to concentrations of credit risk include cash, cash equivalents and accounts receivable. The Company places all cash and cash equivalents with high-credit quality financial institutions. The Company performs ongoing credit valuations of its customers’ financial condition whenever deemed necessary and generally does not 2019 2018 2017 five 2019 2018 2017 y. The five December 31, 2019 and 2018 , respectively. As of December 31, 2019 , Microsoft and Amazon represented 32.0% December 31, 2018 , Microsoft, Amazon and Facebook represented 23.2%, 18.7%, and 12.6% of total accounts receivable, respectively. No ten 2019 , 2018 or 2017 had greater than ten December 31, 2019 or 2018 . 9. Inventories Inventories are stated at the lower of cost (average-cost method) or market. Work in process and finished goods includes materials, labor and allocated overhead. The Company assesses the valuation of its inventory on a periodic basis and provides write-offs for the value of estimated excess and obsolete inventory based on estimates of future demand. 10. Property, Plant and Equipment Property, plant and equipment are stated at cost, net of accumulated depreciation and amortization. The Company calculates depreciation using the straight-line method over the following estimated useful lives: Useful lives Buildings 20 - 42 years Land improvements 10 years Machinery and equipment 2 - 20 years Furniture and fixtures 3 - 7 years Computer equipment and software 3 - 10 years Leasehold improvements The shorter of the life of the applicable lease or the useful life of the improvement Transportation equipment 5 years Major improvements are capitalized and expenditures for maintenance and repairs are expensed as incurred. Construction in progress represents property, plant and equipment under construction or being installed. Costs include original cost, installation, construction and other direct costs which include interest on borrowings used to finance the asset. Construction in progress is transferred to the appropriate fixed asset account and depreciation commences when the asset has been substantially completed and placed in service. Land use rights allow the Company rights for 50 October 7, 2054 December 28, 2067. 11. Intangible Assets Intangible assets consist of intellectual property that is stated at cost less accumulated amortization. As of December 31, 2019 , the Company had 291 total patents issued. The costs incurred to obtain such patents have been capitalized and are being amortized over an estimated life between 10 and 20 may not no 12. Impairment of Long-Lived Assets The Company accounts for impairment of long-lived assets in accordance with Accounting Standards Codification (“ASC”) 360, Property, Plant and Equipment 360” 360, may not not not 2019 2018. 13. Comprehensive Income (Loss) ASC 220, Comprehensive Income 220” 220 14. Share-based Compensation The Company accounts for share-based compensation in accordance with the provisions of ASC 718, Compensation—Stock Compensation 15. Revenue Recognition The Company derives revenue from the manufacture and sale of fiber optic networking products. Revenue recognition follows the criteria of ASC 606, Revenue from Contracts with Customers 16. Product Warranty The Company generally offers a one three five may may December 31, 2019 2018 17. Advertising Costs Advertising costs are charged to operations as incurred and amounted to approximately $0.5 million, $0.5 million, and $0.3 million for the years ended December 31 2019 , 2018 and 2017 , respectively. 18. Research and Development Research and development costs are charged to operations as incurred. The Company receives reimbursement for certain development costs, which are capitalized when incurred, up to the reimbursable amount. 19. Income Taxes The Company accounts for income taxes in accordance with the provisions of ASC 740, Income Taxes not The Company records uncertain tax positions in accordance with ASC 740 two 1 not 2 not 50 The Company recognizes interest and penalties related to unrecognized tax benefits on the income tax expense line in the accompanying consolidated statement of operations. Accrued interest and penalties are included on the related tax liability line in the consolidated balance sheet. 20. Recent Accounting Pronouncements Recent Accounting Pronouncements Adopted in 2019 On February 25, 2016, No. 2016 02, 842, 840. 12 January 1, 2019 not not In June 2018, 2018 07, 718 718 January 1, 2019 no Recent Accounting Pronouncements Yet to be Adopted In June 2016, 2016 13 not December 15, 2019, 2016 13 not

Note C - Revenue Recognition

Note C - Revenue Recognition	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Revenue from Contract with Customer [Text Block]	NOTE C—REVENUE RECOGNITION Revenue from Contracts with Customers On January 1, 2018, 606 not no January 1, 2018 606, not 605" The adoption of Topic 606 606, may five 1. A contract with a customer exists when (i) the Company enters into an agreement with a customer that defines each party's rights regarding the products or services to be transferred and identifies the payment terms related to these products or services, (ii) both parties to the contract are committed to perform their respective obligations, (iii) the contract has commercial substance, and (iv) the Company determines that collection of substantially all consideration for products or services that are transferred is probable based on the customer's intent and ability to pay the promised consideration. The Company applies judgment in determining the customer's ability and intention to pay, which is based on a variety of factors including the customer's payment history or, in the case of a new customer, published credit and financial information pertaining to the customer. 2. Performance obligations promised in a contract are identified based on the products or services that will be transferred to the customer that are both capable of being distinct, whereby the customer can benefit from the product or service either on its own or together with other resources that are readily available from third not 3. The transaction price is determined based on the consideration to which the Company will be entitled in exchange for transferring products or services to the customer. To the extent the transaction price is variable, revenue is recognized at an amount equal to the consideration to which the Company expects to be entitled. This estimate includes customer sales incentives which are accounted for as a reduction to revenue and estimated using either the expected value method or the most likely amount method, depending on the nature of the program. The Company will adjust its consideration for any rebates if it is more likely than not 4. If the contract contains a single performance obligation, the entire transaction price is allocated to the single performance obligation. Contracts that contain multiple performance obligations require an allocation of the transaction price to each performance obligation based on a relative standalone selling price basis unless a portion of the variable consideration related to the contract is allocated entirely to a performance obligation. The Company determines standalone selling price based on the price at which the performance obligation is sold separately. 5. The Company generally satisfies performance obligations at a point in time. Revenue is recognized based on the transaction price at the time the related performance obligation is satisfied by transferring a promised product or service to a customer. Disaggregation of Revenue Revenue is classified based on the location of where the product is manufactured. For additional information on the disaggregated revenues by geographical region, see Note R, "Segments and Geographic Information.” Revenue is also classified by major product category and is presented below (in thousands): Years ended December 31, % of % of % of 2019 Revenue 2018 Revenue 2017 Revenue Data Center $ 143,563 75.2 % $ 200,236 74.9 % $ 306,712 80.2 % CATV 37,328 19.6 % 51,699 19.3 % 60,756 15.9 % Telecom 8,429 4.4 % 13,159 4.9 % 12,899 3.4 % FTTH 190 0.1 % 818 0.3 % 490 0.1 % Other 1,362 0.7 % 1,553 0.6 % 1,472 0.4 % Total Revenue $ 190,872 100.0 % $ 267,465 100.0 % $ 382,329 100.0 %

Note D - Operating Leases

Note D - Operating Leases	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Lessee, Operating and Finance Leases [Text Block]	NOTE D—O perating Leases The Company leases space under non-cancelable 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): Year ended December 31, 2019 Operating lease expense $ 1,229 Financing lease expense 5 Short Term lease expense 111 Total lease expense $ 1,345 Maturities of lease liabilities are as follows for the future one December 31, ( Operating Financing 2020 $ 1,234 $ 22 2021 1,159 22 2022 1,098 22 2023 1,091 65 2024 1,090 — 2025 and thereafter 5,040 — Total lease payments $ 10,712 $ 131 Less imputed interest (1,764 ) (14 ) Present value $ 8,948 $ 117 The weighted average remaining lease term and discount rate for operating leases were as follows for the periods indicated: December 31, 2019 Weighted Average Remaining Lease Term (Years) - operating leases 9.23 Weighted Average Remaining Lease Term (Years) - financing leases 3.83 Weighted Average Discount Rate - operating leases 3.13 % Weighted Average Discount Rate - financing leases 5.00 % Supplemental cash flow information related to operating leases was as follows for the periods indicated (in thousands): Year ended December 31, 2019 Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases 1,325 Operating cash flows from financing lease 8 Financing cash flows from financing lease 2 Right-of-use assets obtained in exchange for new operating lease liabilities 64 Right-of-use assets obtained in exchange for new finance lease liabilities 124

Note E - Cash, Cash Equivalents

Note E - Cash, Cash Equivalents and Restricted Cash	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Cash and Cash Equivalents Disclosure [Text Block]	NOTE E—CASH, CASH EQUIVALENTS AND RESTRICTED CASH 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): December 31, December 31, 2019 2018 Cash and cash equivalents $ 59,977 $ 55,646 Restricted cash 7,051 2,358 Total cash, cash equivalents and restricted cash shown in the statement of cash flows $ 67,028 $ 58,004 Restricted cash includes guarantee deposits for customs duties and compensating balances associated with certain credit facilities. As of December 31, 2019 2018 $4.2 December 31, 2019 2018

Note F - Earnings Per Share

Note F - Earnings Per Share	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Earnings Per Share [Text Block]	NOTE F—EARNINGS PER SHARE Basic net income (loss) per share has been computed using the weighted-average number of shares of common stock outstanding during the period. Diluted net income (loss) per share has been computed using the weighted-average number of shares of common stock and dilutive potential common shares from options and restricted stock units outstanding during the period. In periods with net losses, normally dilutive shares become anti-dilutive. Therefore, basic and dilutive earnings per share are the same. The following table presents the computation of the basic and diluted net income (loss) per share for the periods indicated (in thousands): Year ended December 31, 2019 2018 2017 Numerator: Net income (loss) $ (66,049 ) $ (2,146 ) $ 73,951 Denominator: Weighted average shares used to compute net income (loss) per share Basic 19,982 19,647 19,097 Effect of dilutive options and restricted stock units — — 1,042 Diluted 19,982 19,647 20,139 Net income (loss) per share Basic $ (3.31 ) $ (0.11 ) $ 3.87 Diluted $ (3.31 ) $ (0.11 ) $ 3.67 The following potentially dilutive securities were excluded from diluted net income (loss) per share as their effect would have been antidilutive (in thousands): As of As of December 31, 2019 2018 Employee stock options 44 263 Restricted stock units 1 117 Shares for convertible senior notes 4,587 — Total antidilutive shares 4,632 380

Note G - Inventories

Note G - Inventories	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Inventory Disclosure [Text Block]	NOTE G—INVENTORIES At December 31, 2019 2018 As of December 31, 2019 2018 Raw materials $ 15,570 $ 30,214 Work in process and sub-assemblies 50,787 49,192 Finished goods 18,671 13,850 Total inventory $ 85,028 $ 93,256 For the years ended December 31, 2019 , 2018 and 2017 , the lower of cost or market reserve adjustment expensed for inventory was $6.8 million, $7.2 million, and $1.9 million , respectively. For the years December 31, 2019 , 2018 and 2017 , the direct inventory write-offs related to scrap, discontinued products, and damaged inventories were $13.4 million, $12.3 million, and $6.8 million, respectively.

Note H - Property, Plant and Eq

Note H - Property, Plant and Equipment	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Property, Plant and Equipment Disclosure [Text Block]	NOTE H—PROPERTY, PLANT AND EQUIPMENT Property, plant and equipment consisted of the following for the periods indicated (in thousands): December 31, 2019 December 31, 2018 Land improvements $ 806 $ 806 Building and improvements 83,846 80,960 Machinery and equipment 237,464 214,718 Furniture and fixtures 5,105 5,043 Computer equipment and software 10,506 9,709 Transportation equipment 658 658 338,385 311,894 Less accumulated depreciation and amortization (116,979 ) (95,233 ) 221,406 216,661 Construction in progress 25,937 16,449 Land 1,101 1,101 Total property, plant and equipment, net $ 248,444 $ 234,211 For the years ended December 31, 2019 2018 2017 As of December 31, 2019, 360 10 35 21, Property, Plant, and Equipment no

Note I - Intangible Assets

Note I - Intangible Assets	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Intangible Assets Disclosure [Text Block]	NOTE I—INTANGIBLE ASSETS Intangible assets consisted of the following for the periods indicated (in thousands): December 31, 2019 Gross Accumulated Intangible Amount amortization assets, net Patents $ 7,638 $ (3,560 ) $ 4,078 Trademarks 17 (14 ) $ 3 Total intangible assets $ 7,655 $ (3,574 ) $ 4,081 December 31, 2018 Gross Accumulated Intangible Amount amortization assets, net Patents $ 6,983 $ (3,008 ) $ 3,975 Trademarks 15 (13 ) 2 Total intangible assets $ 6,998 $ (3,021 ) $ 3,977 For the years ended December 31, 2019 2018 2017 7 years. At December 31, 2019 2020 $ 537 2021 537 2022 537 2023 537 2024 537 thereafter 1,396 $ 4,081

Note J - Fair Value of Financia

Note J - Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Fair Value Disclosures [Text Block]	NOTE J—FAIR VALUE OF FINANCIAL INSTRUMENTS The following table presents a summary of the Company’s financial instruments measured at fair value on a recurring basis as of December 31, 2019 Quoted prices Significant in active other markets for observable Significant identical remaining unobservable assets (Level 1) inputs (Level 2) inputs (Level 3) Total Assets: Cash and cash equivalents $ 59,977 $ — $ — $ 59,977 Restricted cash 7,051 — — 7,051 Total assets $ 67,028 $ — $ — $ 67,028 Liabilities: Bank acceptance payable — $ 6,310 — $ 6,310 Convertible senior notes — 77,191 — 77,191 Total liabilities $ — $ 83,501 $ — $ 83,501 The following table presents a summary of the Company’s financial instruments measured at fair value on a recurring basis as of December 31, 2018 Quoted prices Significant in active other markets for observable Significant identical remaining unobservable assets (Level 1) inputs (Level 2) inputs (Level 3) Total Assets: Cash and cash equivalents $ 55,646 $ — $ — $ 55,646 Restricted cash 2,358 — — 2,358 Total assets $ 58,004 $ — $ — $ 58,004 Liabilities: Bank acceptance payable — $ 4,628 — $ 4,628 Total liabilities $ — $ 4,628 $ — $ 4,628

Note K - Notes Payable and Long

Note K - Notes Payable and Long-term Debt	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Debt Disclosure [Text Block]	NOTE K—NOTES PAYABLE AND LONG-TERM DEBT Notes payable and long-term debt consisted of the following for the periods indicated (in thousands): December 31, 2019 December 31, 2018 Revolving line of credit with a U.S. bank up to $20,000 (2019) and $60,000 (2018) with interest at LIBOR plus 1.5% (2019) and 1.4% (2018), maturing April 2, 2021 $ 20,000 $ 23,104 Term loan with a U.S. bank with monthly payments of principal and interest at LIBOR plus 1.15%, maturing April 1, 2024 — 20,067 Term loan with a U.S. bank with monthly payments of principal and interest at LIBOR plus 1.3%, maturing between April 1, 2023 and December 18, 2023 — 19,164 Revolving line of credit with a Taiwan bank up to $9,767 with 2% interest, maturing May 31, 2019 3,256 Revolving line of credit with a Taiwan bank up to $7,000 with interest ranging from 1.5% to 3.5%, matured July 26, 2019 — 3,550 Revolving line of credit with a Taiwan bank up to $3,336 with 2.2% interest, maturing July 31, 2020 3,336 — Notes payable to a finance company due in monthly installments with 3.4% interest, maturing November 30, 2021 4,262 6,331 Notes payable to a finance company due in monthly installments with 3.1% interest, maturing January 21, 2022 4,633 — Revolving line of credit with a Taiwan bank up to $2,668 with interest of 1.7%, maturing April 11, 2020 2,668 — Revolving line of credit with a China bank up to $18,599 with interest ranging from 4.1% to 4.6%, maturing September 21, 2023 — 8,652 Revolving line of credit with a China bank up to $25,449 with interest of 4.57%, maturing May 24, 2024 7,919 — Credit facility with a China bank up to $7,167 with interest of 5.7%, maturing June 20, 2022 7,167 — Sub-total 49,985 84,124 Less debt issuance costs, net (62 ) (207 ) Grand total 49,923 83,917 Less current portion (33,371 ) (23,589 ) Non-current portion $ 16,552 $ 60,328 Bank Acceptance Notes Payable Bank acceptance notes issued to vendors with a zero percent interest rate $ 6,310 $ 4,628 The current portion of long-term debt is the amount payable within one December 31, 2019 Maturities of notes payable and long-term debt are as follows for the future years ending December 31 2020 $ 33,371 2021 10,838 2022 5,714 Total outstanding $ 49,923 On September 28, 2017, three not one On March 30, 2018, $60 $26 $21.5 three $50 September 28, 2017 ( 1 three $50 2 five 3 seventy one one one not On February 1, 2019, September 28, 2017, first March 30, 2018, three five seventy March 30, 2019 September 30, 2019, On March 5, 2019, $60,000,000 $25,000,000; not not not seven seven On March 5, 2019, On September 30, 2019, $25,000,000 $20,000,000; September 28, 2020 April 2, 2021; ( 1.0, twelve seventy-five As of December 31, 2019 December 31, 2019 On June 19, 2018, one June 19, 2018 July 31, 2019. 90 120 December 31, 2019, On July 23, 2019, one “NT$100M “US$1M NT$100M US$1M NT$100M US$1M may July 23, 2019 July 31, 2020. NT$100M 90 120 US$1M December 31, 2019, On October 3, 2018, may October 3, 2018 July 26, 2019. not December 31, 2019 On November 29, 2018, NT$267,340,468, three NT$67,340,468, NT$5,571,229, NT$6,139,188, NT$210,601,605, December 31, 2019, On January 21, 2019, second NT$267,333,186, three NT$67,333,186, NT$5,570,167, NT$6,082,131, NT$209,555,736 December 31, 2019 On December 11, 2018, one NT$150 may December 11, 2018 October 31, 2019. December 31, 2019, On April 11, 2019, one NT$80 may April 11, 2019 April 11, 2020. one TAIFX3 one TAIFX3 December 31, 2019 On September 21, 2018, five may September 21, 2018 September 17, 2023; may may May 10, 2019, On April 19, 2019, twelve may April 19, 2019 April 18, 2020 ( may may As of December 31, 2019 , there was no outstanding balance under the China Merchants Credit Line and the outstanding balance of bank acceptance notes issued to vendors was $0.1 million. On April 30, 2019, one ¥9.9M ¥9.9M may ¥9.9M April 30, 2019 May 9, 2019. ¥9.9M April 30, 2020 twelve 12 ¥9.9M ¥9.9M ¥9.9M May 24, 2019. On May 7, 2019, one ¥30M ¥30M ¥30M May 7, 2020 twelve 12 12 ¥30M ¥30M ¥30M May 24, 2019. On May 8, 2019, six “$2M $2M $2M November 7, 2019 six 6 $2M 6 $2M $2M $2M May 24, 2019. On May 24, 2019, five 180 30 May 7, 2019; 9.9 April 30, 2019. may 5 may December 31, 2019 $7.9 million was outstanding under the SPD Credit Line and the outstanding balance of bank acceptance notes issued to vendors was $5.5 million. On June 21, 2019, “¥100M ¥100M may ¥100M June 21, 2019 January 4, 2021 ( “¥100M ¥100M may ¥100M ¥100M may ¥100M December 31, 2019 there was no outstanding balance under the ¥100M On June 21, 2019, three “¥50M ¥50M may ¥50M June 21, 2019 June 20, 2022 ( “¥50M ¥50M may ¥50M may ¥50M As of December 31, 2019 , $7.2 million was outstanding under the ¥50M As of December 31, 2019 2018 $48.8 One-month LIBOR rates were 1.76% and 2.50% at December 31, 2019 2018 As of December 31, 2019 2018 $6.1

Note L - Convertible Senior Not

Note L - Convertible Senior Notes	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Convertible Debt [Text Block]	NOTE L—C onvertible Senior Notes 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 BB&T 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): December 31, 2019 Principal $ 80,500 Unamortized debt issuance costs (3,459 ) Net carrying amount $ 77,041 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 may not March 15, 2022. 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, Contracts in Entity’s Own Equity 815 40, 1 2 815 40 25 7 815 40 25 10. not 470 20, Debt with Conversion and Other Options 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 December 31, Year ended December 31, 2019 2018 2019 2018 Contractual interest expense 984 — 3,276 — Amortization of debt issuance costs 207 — 681 — Total interest cost $ 1,191 $ — $ 3,957 $ — Effective interest rate 5.1 % 0 % 5.1 % 0 %

Note M - Accrued Liabilities

Note M - Accrued Liabilities	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block]	NOTE M—ACCRUED LIABILITIES Accrued liabilities consisted of the following for the periods indicated (in thousands): December 31, 2019 December 31, 2018 Accrued payroll $ 11,009 $ 10,772 Accrued rent — 1,200 Accrued employee benefits 2,288 2,862 Accrued state and local taxes 1,215 1,088 Accrued interest 1,208 163 Advance payments 312 426 Accrued product warranty 821 995 Accrued commission expenses 420 398 Accrued professional fees 222 315 Accrued capital expenditures — 371 Accrued other 369 701 Total accrued liabilities $ 17,864 $ 19,291

Note N - Other Income and Expen

Note N - Other Income and Expense	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Other Nonoperating Income and Expense [Text Block]	NOTE N—OTHER INCOME AND EXPENSE Other income and expense consisted of the following for the periods indicated (in thousands): Year ended December 31, 2019 2018 2017 Foreign exchange transaction gain (loss) $ 20 $ 663 $ (2,012 ) Government subsidy income 1,614 934 211 Other non-operating gain 219 224 110 Loss on disposal of assets (13 ) (7 ) (97 ) Total other income (expense), net $ 1,840 $ 1,814 $ (1,788 )

Note O - Income Taxes

Note O - Income Taxes	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Income Tax Disclosure [Text Block]	NOTE O—INCOME TAXES The sources of the Company’s income (loss) from operations before income taxes were as follows (in thousands): Year ended December 31, 2019 2018 2017 Domestic $ (35,279 ) $ (11,444 ) 17,497 Foreign (16,108 ) 1,666 67,029 Total income (loss) before income taxes $ (51,387 ) $ (9,778 ) 84,526 The provision for income tax expense (benefit) for the years ended December 31, Current: 2019 2018 2017 Federal $ — $ — $ — State 16 80 (292 ) Foreign 97 1,349 10,965 Total $ 113 $ 1,429 $ 10,673 Deferred: Federal $ 16,375 $ (6,391 ) $ 2,015 State 1,716 61 (1,669 ) Foreign (3,542 ) (2,731 ) (444 ) Total $ 14,549 $ (9,061 ) $ (98 ) Income tax (benefit) expense $ 14,662 $ (7,632 ) $ 10,575 Deferred income tax assets and liabilities result principally from net operating losses, different methods of recognizing depreciation, reserves for doubtful accounts and inventory, research and development credits and foreign tax credits. At December 31, 2019 2018 NOL carryforward $ 21,516 $ 12,049 Inventory reserves 2,385 1,490 AMT credit 172 172 Unrealized gains and losses 96 69 Share-based compensation 528 510 Foreign tax credit 4,599 4,599 Research and development credits 8,264 6,648 Interest 888 208 ASC 842 Assets 1,641 — Other 520 718 Deferred tax assets 40,609 26,463 Less valuation allowance (25,736 ) — Deferred tax assets, net 14,873 26,463 Depreciation and amortization (6,180 ) (4,749 ) ASC 842 Liabilities (1,406 ) — Deferred tax liabilities (7,586 ) (4,749 ) Deferred tax assets, net $ 7,287 $ 21,714 The Company has a U.S. net operating loss carry forward of approximately $75.9 million, $32.7 million of which, if unused, expires between 2026 2032 2028 2038. 2028. 382. Management assesses the available positive and negative evidence to estimate whether sufficient future taxable income will be generated to permit use of the existing deferred tax assets. A significant piece of objective negative evidence evaluated was the cumulative loss incurred over the three December 31, 2019. On the basis of this evaluation, as of December 31, 2019, $25.7 not not December 31, 2019. no A reconciliation of the U.S. federal income tax rate of 21%, 21 % and 35% for the years ended December 31, 2019 , 2018 and 2017 , respectively, to the Company’s effective income tax rate follows (in thousands): 2019 2018 2017 Expected taxes at statutory rate $ (10,791 ) $ (2,053 ) $ 29,584 Non-deductible/non-taxable items 962 1,020 1,212 Foreign rate differences 590 (1,043 ) (11,656 ) Foreign permanent differences (671 ) (1,067 ) 416 Increase (decrease) in valuation allowance 25,736 — (1,700 ) Share-based compensation 607 (1,325 ) (10,348 ) Changes in tax rates — (103 ) 2,768 Transition tax adjustment, net of foreign tax credits (1,777 ) 5,067 Research and development credits (1,616 ) (2,022 ) (2,821 ) Uncertain tax positions — — (1,616 ) Foreign other 27 514 — Other, net (182 ) 224 (331 ) Tax (benefit) expense $ 14,662 $ (7,632 ) $ 10,575 The Company's provision for income taxes in 2019 2018 The Company’s provision for income taxes in 2018 2017 2017 2017 The Company’s wholly owned subsidiary, Prime World is a tax-exempt entity under the Income Tax Code of the British Virgin Islands. The Company’s wholly owned subsidiary, Global Technology, Inc., has enjoyed preferential tax concessions in China as a national high-tech enterprise. In March 2007, January 1, 2008, 2008 three November 2008 November 2011. 2011 2014, three September 2017. November 2017, National high-tech enterprise certificate and was therefore extended its three November 2017 November 2020. 20 19, 2018 and 2017 $1.0, $0.5 and $1.4 million respectively . This tax holiday reduced its fiscal 2019, 2018 2017 $ 0.05 , $0.03 and $0.07 respectively. Effective January 1, 2016, As of December 31, 2019 , 2018 and 2017 , the total amount of unrecognized tax benefit was $0.2 million, $0.2 million, and $0.2 2019 2018 2017 Unrecognized tax benefits — January 1 $ 181 $ 181 $ 181 Gross increases — tax positions in prior period — — — Gross decreases — tax positions in prior period — — — Unrecognized tax benefits — December 31 $ 181 $ 181 $ 181 The Company recognizes interest accrued related to unrecognized tax benefits and penalties as income tax expense. Related to the unrecognized tax benefits noted above, it has not 2019 as a result of net operating losses. During 2018 or 2017 , the Company also accrued no penalties or interest. The Company is subject to taxation in the United States and various states and foreign jurisdictions. The Company’s open tax years subject to examination in the U.S. federal and state jurisdictions are 2016 2018. may 2010 The U.S. Tax Act significantly changed how the U.S. taxes corporations. The U.S. Tax Act requires complex computations to be performed that were not not may may As of December 31, 2019 , the Company has accumulated undistributed earnings generated by its foreign subsidiaries of approximately $ million. Because $ 27.9 million of such earnings have previously been subject to the one U.S. Tax Act, any additional taxes due with respect to such earnings or the excess of the amount for financial reporting over the tax basis of our foreign investments would generally be limited to foreign and state taxes. The Company intends, however, to indefinitely reinvest these earnings and expects future U.S. cash generation to be sufficient to meet future U.S. cash needs.

Note P - Share-based Compensati

Note P - Share-based Compensation	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Share-based Payment Arrangement [Text Block]	NOTE P—SHARE-BASED COMPENSATION Equity Plans The Company’s board of directors and stockholders approved the following equity plans: ‑ the 1998 ‑ the 2000 ‑ the 2004 ‑ the 2006 ‑ the Amended and Restated 2013 “2013 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, Company’s stock had been historically determined by the board of directors and from time to time with the assistance of third Stock Options Options have been granted to the Company’s employees under the five 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, January 1, 2019 287 $ 10.19 $ 5.31 $ 1,503 Exercised (4 ) 7.79 $ 12.91 3.95 15 Forfeited (2 ) 12.20 6.08 2 Outstanding, December 31, 2019 281 $ 10.21 $ 5.32 3.87 573 Exercisable, December 31, 2019 281 $ 10.21 3.87 573 Vested and expected to vest 281 $ 10.21 3.87 $ 573 As of December 31, 2019 , there was no unrecognized stock option expense. Restricted Stock Unit/Awards The following is a summary of RSU/RSA activity (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, 2019 826 $ 32.07 $ 12,744 Granted 445 13.30 6 Released (452 ) $ 25.95 25.95 6 Cancelled/Forfeited (49 ) 26.17 584 Outstanding, December 31, 2019 770 25.18 9,143 Vested and expected to vest 770 $ 25.18 $ 9,143 The aggregate intrinsic value of RSUs and RSAs outstanding at December 31, 2019 was $9.8 million. Unrecognized compensation expense related to these RSUs and RSAs at December 31, 2019 was $16.8 million. This expense is expected to be recognized over 1.99 years. Share-Based Compensation The Company recognizes compensation expense on a straight-line basis over the applicable vesting term of the award and expense is adjusted as forfeitures occur. In 2014, Employee share-based compensation expenses recognized for the years ended December 31, Share-Based compensation - by expense type: 2019 2018 2017 Cost of goods sold $ 772 $ 795 $ 461 Research and development 2,557 2,419 1,496 Sales and marketing 1,070 925 481 General and administrative 7,405 6,981 5,357 Total share-based compensation expense $ 11,804 $ 11,120 $ 7,795 Share-Based compensation - by award type: 2019 2018 2017 Employee stock options $ — $ 12 $ 853 Restricted stock units 11,804 11,108 6,942 Total share-based compensation expense $ 11,804 $ 11,120 $ 7,795

Note Q - Stockholders' Equity

Note Q - Stockholders' Equity	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Stockholders' Equity Note Disclosure [Text Block]	NOTE Q—STOCKHOLDERS’ EQUITY Common Stock The Company’s Amended and Restated Certificate of Incorporation authorizes the issuance of up to 45,000,000 shares of common stock, all of which have been designated voting common stock. Preferred Stock The Company’s Amended and Restated Certificate of Incorporation authorizes the issuance of up to 5,000,000 shares of preferred stock. Public Offerings of Common Stock On October 17, 2016, 3 November 1, 2016, 3, may November 22, 2016, March 2017 October 24, 2019, 3 January 9, 2020, 3.

Note R - Segment and Geographic

Note R - Segment and Geographic Information	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	NOTE R—SEGMENT AND GEOGRAPHIC INFORMATION 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): For the Years ended December 31, 2019 2018 2017 Revenues: United States $ 9,795 $ 10,795 $ 18,209 Taiwan 97,776 113,547 241,820 China 83,301 143,123 122,300 $ 190,872 $ 267,465 $ 382,329 As of December 31, 2019 2018 2017 Long-lived assets: United States $ 94,507 $ 88,815 $ 75,446 Taiwan 73,816 65,451 67,379 China 97,687 89,736 59,929 $ 266,010 $ 244,002 $ 202,754 The Company serves four 2019 2018 2017

Note S - Employee Benefit Plans

Note S - Employee Benefit Plans	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Compensation and Employee Benefit Plans [Text Block]	NOTE S—EMPLOYEE BENEFIT PLANS On August 1, 2000, 401 401 December 31, 2019 2018 2017 Employees of Global participate in a state-mandated social security program in China. Under this program, pension costs are recorded on the basis of required monthly contributions to employees’ individual accounts during their service periods. Under the regulations of the People’s Republic of China, Global is required to make fixed contributions to a fund, which is under the administration of the local labor departments. Pension expense for Global was $0.7 million, $0.9 million, and $0.8 million in the years ended for the year ended December 31, 2019 , 2018 and 2017 , respectively. Employees Prime World’s Taiwan branch participate in a pension program under the Taiwan Labor Pension Act. Pension expense for the Prime World’s Taiwan branch was $0.8 million, $0.9 million, and $0.9 million for the years ended December 31, 2019 , 2018 and 2017 , respectively.

Note T - Commitments and Contin

Note T - Commitments and Contingencies	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	NOTE T—COMMITMENTS AND CONTINGENCIES Commitments The Company conducts part of its operations from leased facilities and also leases equipment. Rent expense was $1.3 million, December 31, 2019 2018 2017 At December 31, 2019 one 2029 Year ended December 31, Amount 2020 $ 1,256 2021 1,181 2022 1,120 2023 1,156 2024 1,090 thereafter 5,040 $ 10,843 Employment Agreements and Consultancy Agreements The Company has entered into employment and indemnification agreements with three The Company has also entered into employment and indemnification agreements with one six Contingencies From time to time, the Company may not Except for the lawsuits described below, the Company believes that there are no Class Action and Shareholder Derivative Litigation On August 5, 2017, two Mona Abouzied v. Applied Optoelectronics, Inc., Chih-Hsiang (Thompson) Lin, and Stefan J. Murry, et al. No. 4:17 02399. 10 20 August 3, 2017 40G one 100G.” August 16, 2017 ( No. 4:17 02512 two January 22, 2018, March 6, 2018. April 4, 2018, March 28, 2019. May 15, 2019, X. May 16, 2019. second May 28, 2019, 23 July 12, 2019, August 26, 2019, November 13, 2019, November 27, 2019. December 11, 2019, December 16, 2019, December 20, 2019. January 3, 2020, January 13, 2020, January 21, 2020. January 23, 2020, 90 January 24, 2020. June 1, 2020. not On August 7, 2018, No. 4:18 02713 No. 4:18 4751 Abouzied Taneja Taneja On October 1, 2018, two Gaurav Taneja v. Applied Optoelectronics, Inc., Thompson Lin, and Stefan Murry No. 4:18 03544. 10 20 September 28, 2018 third 25G two Davin Pokoik v. Applied Optoelectronics, Inc., Chih-Hsiang Lin, and Stefan J. Murry, Case No. 4:18 3722 Stephen McGrath v. Applied Optoelectronics, Inc., Chih-Hsiang Lin, and Stefan J. Murry January 4, 2019. March 5, 2019, May 6, 2019. July 5, 2019, August 5, 2019. January 29, 2020, February 28, 2020.

Note U - Subsequent Events

Note U - Subsequent Events	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Subsequent Events [Text Block]	NOTE U—SUBSEQUENT EVENTS The Company has evaluated subsequent events through the date the financial statements were issued. In January 2020,

Note V - Selected Quarterly Fin

Note V - Selected Quarterly Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Quarterly Financial Information [Text Block]	NOTE V—Selected Quarterly Financial Data (unaudited) The following tables set forth a summary of the Company’s quarterly financial information for each of the four December 31, 2019 2018 First Second Third Fourth Year ended December 31, 2019 Quarter Quarter Quarter Quarter Revenue $ 52,719 $ 43,411 $ 46,084 $ 48,658 Cost of goods sold 40,368 32,873 34,108 37,322 Gross profit 12,351 10,538 11,976 11,336 Gross margin 23.4 % 24.3 % 26.0 % 23.3 % Operating expenses: Research and development 11,185 11,151 10,466 10,597 Sales and marketing 2,595 2,331 2,518 2,615 General and administrative 10,440 10,884 9,988 10,178 Total operating expenses 24,220 24,366 22,972 23,390 Income (loss) from operations (11,869 ) (13,828 ) (10,996 ) (12,054 ) Interest and other income (expense), net (1,079 ) (729 ) 276 (1,109 ) Net income (loss) before taxes (12,948 ) (14,557 ) (10,720 ) (13,163 ) Income tax (expense) benefit 2,474 3,191 1,940 (22,267 ) Net income (loss) $ (10,474 ) $ (11,366 ) $ (8,780 ) $ (35,430 ) Net income (loss) per share—basic $ (0.53 ) $ (0.57 ) $ (0.44 ) $ (1.76 ) Net income (loss) per share—diluted $ (0.53 ) $ (0.57 ) $ (0.44 ) $ (1.76 ) First Second Third Fourth Year ended December 31, 2018 Quarter Quarter Quarter Quarter Revenue $ 65,239 $ 87,822 $ 56,386 $ 58,018 Cost of goods sold 39,403 53,959 38,849 47,481 Gross profit 25,836 33,863 17,537 10,537 Gross margin 39.6 % 38.6 % 31.1 % 18.2 % Operating expenses: Research and development 11,736 12,645 14,180 11,342 Sales and marketing 2,474 2,377 2,370 1,920 General and administrative 9,456 9,898 10,591 9,552 Total operating expenses 23,666 24,920 27,141 22,814 Income from operations 2,170 8,943 (9,604 ) (12,277 ) Interest and other expense, net (1,046 ) 1,387 578 71 Net income before taxes 1,124 10,330 (9,026 ) (12,206 ) Income tax (expense) benefit 996 (2,296 ) 5,294 3,638 Net income $ 2,120 $ 8,034 $ (3,732 ) $ (8,568 ) Net income per share—basic $ 0.11 $ 0.41 $ (0.19 ) $ (0.43 ) Net income per share—diluted $ 0.11 $ 0.40 $ (0.19 ) $ (0.43 ) F- 35

Significant Accounting Policies

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	1. Basis of Presentation The consolidated financial statements include the accounts of the Company and all of its wholly-owned subsidiaries and are prepared in accordance with accounting principles generally accepted in the United States of America (GAAP). All intercompany balances and transactions have been eliminated in consolidation.
Use of Estimates, Policy [Policy Text Block]	2. 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 relate to, among other things, allowance for doubtful accounts, inventory reserve, product warranty costs, share-based compensation expense, estimated useful lives of property and equipment, and taxes.
Foreign Currency Transactions and Translations Policy [Policy Text Block]	3. Foreign Currency Translation The functional currency for the Company’s foreign operations is the local currency. The assets and liabilities of these operations are translated at the rate of exchange in effect on the balance sheet date and sales and expenses are translated at monthly average rates. The resulting gains or losses from translation are included in a separate component of other comprehensive income. There is no
Fair Value of Financial Instruments, Policy [Policy Text Block]	4. Fair Value The carrying value of cash, cash equivalents and short-term investments, accounts receivable, accounts payable, and note receivable approximate their historical fair values due to their short-term maturities. The carrying value of the debt approximates its fair value due to the short-term nature of the debt since it renews frequently at current interest rates. Management believes that the interest rates in effect at each year end represent the current market rates for similar borrowings. The fair value measurement standard defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The standard characterizes inputs used in determining fair value according to a hierarchy that prioritized inputs based on the degree to which they are observable. The three Level 1—Inputs Level 2—Inputs 1 not Level 3—Inputs not Assets and liabilities that are required to be fair valued on a recurring basis include money market funds, marketable securities, equity instruments and contingent consideration. Money market funds are valued with Level 1
Cash and Cash Equivalents, Policy [Policy Text Block]	5. Cash and Cash Equivalents The Company considers all highly liquid securities with an original maturity of ninety Cash in foreign accounts was approximately $15.1 million and $8.0 million at December 31, 2019 and 2018 , respectively. The Company maintains cash and cash equivalents at U.S. financial institutions for which the combined account balances in individual institutions may December 31, 2019 not not not
Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block]	6. Restricted Cash/Compensating Balances Restricted cash includes guarantee deposits for customs duties and compensating balances associated with credit facilities.
Receivables, Trade and Other Accounts Receivable, Allowance for Doubtful Accounts, Policy [Policy Text Block]	7. Accounts Receivable/Allowance for Doubtful Accounts The Company carries its accounts receivable at the net amount that it estimates to be collectible. An allowance for uncollectable accounts is maintained through a charge against operations. The allowance is determined by management review of outstanding amounts per customer, historical payments and the aging of accounts.
Concentration Risk, Credit Risk, Policy [Policy Text Block]	8. Concentration of Credit Risk and Significant Customers Financial instruments which potentially subject the Company to concentrations of credit risk include cash, cash equivalents and accounts receivable. The Company places all cash and cash equivalents with high-credit quality financial institutions. The Company performs ongoing credit valuations of its customers’ financial condition whenever deemed necessary and generally does not 2019 2018 2017 five 2019 2018 2017 y. The five December 31, 2019 and 2018 , respectively. As of December 31, 2019 , Microsoft and Amazon represented 32.0% December 31, 2018 , Microsoft, Amazon and Facebook represented 23.2%, 18.7%, and 12.6% of total accounts receivable, respectively. No ten 2019 , 2018 or 2017 had greater than ten December 31, 2019 or 2018 .
Inventory, Policy [Policy Text Block]	9. Inventories Inventories are stated at the lower of cost (average-cost method) or market. Work in process and finished goods includes materials, labor and allocated overhead. The Company assesses the valuation of its inventory on a periodic basis and provides write-offs for the value of estimated excess and obsolete inventory based on estimates of future demand.
Property, Plant and Equipment, Policy [Policy Text Block]	10. Property, Plant and Equipment Property, plant and equipment are stated at cost, net of accumulated depreciation and amortization. The Company calculates depreciation using the straight-line method over the following estimated useful lives: Useful lives Buildings 20 - 42 years Land improvements 10 years Machinery and equipment 2 - 20 years Furniture and fixtures 3 - 7 years Computer equipment and software 3 - 10 years Leasehold improvements The shorter of the life of the applicable lease or the useful life of the improvement Transportation equipment 5 years Major improvements are capitalized and expenditures for maintenance and repairs are expensed as incurred. Construction in progress represents property, plant and equipment under construction or being installed. Costs include original cost, installation, construction and other direct costs which include interest on borrowings used to finance the asset. Construction in progress is transferred to the appropriate fixed asset account and depreciation commences when the asset has been substantially completed and placed in service. Land use rights allow the Company rights for 50 October 7, 2054 December 28, 2067.
Goodwill and Intangible Assets, Policy [Policy Text Block]	11. Intangible Assets Intangible assets consist of intellectual property that is stated at cost less accumulated amortization. As of December 31, 2019 , the Company had 291 total patents issued. The costs incurred to obtain such patents have been capitalized and are being amortized over an estimated life between 10 and 20 may not no
Impairment or Disposal of Long-Lived Assets, Including Intangible Assets, Policy [Policy Text Block]	12. Impairment of Long-Lived Assets The Company accounts for impairment of long-lived assets in accordance with Accounting Standards Codification (“ASC”) 360, Property, Plant and Equipment 360” 360, may not not not 2019 2018.
Comprehensive Income, Policy [Policy Text Block]	13. Comprehensive Income (Loss) ASC 220, Comprehensive Income 220” 220
Share-based Payment Arrangement [Policy Text Block]	14. Share-based Compensation The Company accounts for share-based compensation in accordance with the provisions of ASC 718, Compensation—Stock Compensation
Revenue from Contract with Customer [Policy Text Block]	15. Revenue Recognition The Company derives revenue from the manufacture and sale of fiber optic networking products. Revenue recognition follows the criteria of ASC 606, Revenue from Contracts with Customers
Standard Product Warranty, Policy [Policy Text Block]	16. Product Warranty The Company generally offers a one three five may may December 31, 2019 2018
Advertising Cost [Policy Text Block]	17. Advertising Costs Advertising costs are charged to operations as incurred and amounted to approximately $0.5 million, $0.5 million, and $0.3 million for the years ended December 31 2019 , 2018 and 2017 , respectively.
Research and Development Expense, Policy [Policy Text Block]	18. Research and Development Research and development costs are charged to operations as incurred. The Company receives reimbursement for certain development costs, which are capitalized when incurred, up to the reimbursable amount.
Income Tax, Policy [Policy Text Block]	19. Income Taxes The Company accounts for income taxes in accordance with the provisions of ASC 740, Income Taxes not The Company records uncertain tax positions in accordance with ASC 740 two 1 not 2 not 50 The Company recognizes interest and penalties related to unrecognized tax benefits on the income tax expense line in the accompanying consolidated statement of operations. Accrued interest and penalties are included on the related tax liability line in the consolidated balance sheet.
New Accounting Pronouncements, Policy [Policy Text Block]	20. Recent Accounting Pronouncements Recent Accounting Pronouncements Adopted in 2019 On February 25, 2016, No. 2016 02, 842, 840. 12 January 1, 2019 not not In June 2018, 2018 07, 718 718 January 1, 2019 no Recent Accounting Pronouncements Yet to be Adopted In June 2016, 2016 13 not December 15, 2019, 2016 13 not

Note B - Summary of Significa_2

Note B - Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Schedule of Useful Lives of Property, Plant and Equipment [Table Text Block]	Useful lives Buildings 20 - 42 years Land improvements 10 years Machinery and equipment 2 - 20 years Furniture and fixtures 3 - 7 years Computer equipment and software 3 - 10 years Leasehold improvements The shorter of the life of the applicable lease or the useful life of the improvement Transportation equipment 5 years

Note C - Revenue Recognition (T

Note C - Revenue Recognition (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Disaggregation of Revenue [Table Text Block]	Years ended December 31, % of % of % of 2019 Revenue 2018 Revenue 2017 Revenue Data Center $ 143,563 75.2 % $ 200,236 74.9 % $ 306,712 80.2 % CATV 37,328 19.6 % 51,699 19.3 % 60,756 15.9 % Telecom 8,429 4.4 % 13,159 4.9 % 12,899 3.4 % FTTH 190 0.1 % 818 0.3 % 490 0.1 % Other 1,362 0.7 % 1,553 0.6 % 1,472 0.4 % Total Revenue $ 190,872 100.0 % $ 267,465 100.0 % $ 382,329 100.0 %

Note D - Operating Leases (Tabl

Note D - Operating Leases (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Lease, Cost [Table Text Block]	Year ended December 31, 2019 Operating lease expense $ 1,229 Financing lease expense 5 Short Term lease expense 111 Total lease expense $ 1,345 December 31, 2019 Weighted Average Remaining Lease Term (Years) - operating leases 9.23 Weighted Average Remaining Lease Term (Years) - financing leases 3.83 Weighted Average Discount Rate - operating leases 3.13 % Weighted Average Discount Rate - financing leases 5.00 % Year ended December 31, 2019 Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases 1,325 Operating cash flows from financing lease 8 Financing cash flows from financing lease 2 Right-of-use assets obtained in exchange for new operating lease liabilities 64 Right-of-use assets obtained in exchange for new finance lease liabilities 124
Lessee, Operating and Finance Lease, Liability, Maturity [Table Text Block]	Operating Financing 2020 $ 1,234 $ 22 2021 1,159 22 2022 1,098 22 2023 1,091 65 2024 1,090 — 2025 and thereafter 5,040 — Total lease payments $ 10,712 $ 131 Less imputed interest (1,764 ) (14 ) Present value $ 8,948 $ 117

Note E - Cash, Cash Equivalen_2

Note E - Cash, Cash Equivalents and Restricted Cash (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Schedule of Cash and Cash Equivalents [Table Text Block]	December 31, December 31, 2019 2018 Cash and cash equivalents $ 59,977 $ 55,646 Restricted cash 7,051 2,358 Total cash, cash equivalents and restricted cash shown in the statement of cash flows $ 67,028 $ 58,004

Note F - Earnings Per Share (Ta

Note F - Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	Year ended December 31, 2019 2018 2017 Numerator: Net income (loss) $ (66,049 ) $ (2,146 ) $ 73,951 Denominator: Weighted average shares used to compute net income (loss) per share Basic 19,982 19,647 19,097 Effect of dilutive options and restricted stock units — — 1,042 Diluted 19,982 19,647 20,139 Net income (loss) per share Basic $ (3.31 ) $ (0.11 ) $ 3.87 Diluted $ (3.31 ) $ (0.11 ) $ 3.67
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]	As of As of December 31, 2019 2018 Employee stock options 44 263 Restricted stock units 1 117 Shares for convertible senior notes 4,587 — Total antidilutive shares 4,632 380

Note G - Inventories (Tables)

Note G - Inventories (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Schedule of Inventory, Current [Table Text Block]	As of December 31, 2019 2018 Raw materials $ 15,570 $ 30,214 Work in process and sub-assemblies 50,787 49,192 Finished goods 18,671 13,850 Total inventory $ 85,028 $ 93,256

Note H - Property, Plant and _2

Note H - Property, Plant and Equipment (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Property, Plant and Equipment [Table Text Block]	December 31, 2019 December 31, 2018 Land improvements $ 806 $ 806 Building and improvements 83,846 80,960 Machinery and equipment 237,464 214,718 Furniture and fixtures 5,105 5,043 Computer equipment and software 10,506 9,709 Transportation equipment 658 658 338,385 311,894 Less accumulated depreciation and amortization (116,979 ) (95,233 ) 221,406 216,661 Construction in progress 25,937 16,449 Land 1,101 1,101 Total property, plant and equipment, net $ 248,444 $ 234,211

Note I - Intangible Assets (Tab

Note I - Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Schedule of Finite-Lived Intangible Assets [Table Text Block]	December 31, 2019 Gross Accumulated Intangible Amount amortization assets, net Patents $ 7,638 $ (3,560 ) $ 4,078 Trademarks 17 (14 ) $ 3 Total intangible assets $ 7,655 $ (3,574 ) $ 4,081 December 31, 2018 Gross Accumulated Intangible Amount amortization assets, net Patents $ 6,983 $ (3,008 ) $ 3,975 Trademarks 15 (13 ) 2 Total intangible assets $ 6,998 $ (3,021 ) $ 3,977
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	2020 $ 537 2021 537 2022 537 2023 537 2024 537 thereafter 1,396 $ 4,081

Note J - Fair Value of Financ_2

Note J - Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	Quoted prices Significant in active other markets for observable Significant identical remaining unobservable assets (Level 1) inputs (Level 2) inputs (Level 3) Total Assets: Cash and cash equivalents $ 59,977 $ — $ — $ 59,977 Restricted cash 7,051 — — 7,051 Total assets $ 67,028 $ — $ — $ 67,028 Liabilities: Bank acceptance payable — $ 6,310 — $ 6,310 Convertible senior notes — 77,191 — 77,191 Total liabilities $ — $ 83,501 $ — $ 83,501 Quoted prices Significant in active other markets for observable Significant identical remaining unobservable assets (Level 1) inputs (Level 2) inputs (Level 3) Total Assets: Cash and cash equivalents $ 55,646 $ — $ — $ 55,646 Restricted cash 2,358 — — 2,358 Total assets $ 58,004 $ — $ — $ 58,004 Liabilities: Bank acceptance payable — $ 4,628 — $ 4,628 Total liabilities $ — $ 4,628 $ — $ 4,628

Note K - Notes Payable and Lo_2

Note K - Notes Payable and Long-term Debt (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Schedule of Debt [Table Text Block]	December 31, 2019 December 31, 2018 Revolving line of credit with a U.S. bank up to $20,000 (2019) and $60,000 (2018) with interest at LIBOR plus 1.5% (2019) and 1.4% (2018), maturing April 2, 2021 $ 20,000 $ 23,104 Term loan with a U.S. bank with monthly payments of principal and interest at LIBOR plus 1.15%, maturing April 1, 2024 — 20,067 Term loan with a U.S. bank with monthly payments of principal and interest at LIBOR plus 1.3%, maturing between April 1, 2023 and December 18, 2023 — 19,164 Revolving line of credit with a Taiwan bank up to $9,767 with 2% interest, maturing May 31, 2019 3,256 Revolving line of credit with a Taiwan bank up to $7,000 with interest ranging from 1.5% to 3.5%, matured July 26, 2019 — 3,550 Revolving line of credit with a Taiwan bank up to $3,336 with 2.2% interest, maturing July 31, 2020 3,336 — Notes payable to a finance company due in monthly installments with 3.4% interest, maturing November 30, 2021 4,262 6,331 Notes payable to a finance company due in monthly installments with 3.1% interest, maturing January 21, 2022 4,633 — Revolving line of credit with a Taiwan bank up to $2,668 with interest of 1.7%, maturing April 11, 2020 2,668 — Revolving line of credit with a China bank up to $18,599 with interest ranging from 4.1% to 4.6%, maturing September 21, 2023 — 8,652 Revolving line of credit with a China bank up to $25,449 with interest of 4.57%, maturing May 24, 2024 7,919 — Credit facility with a China bank up to $7,167 with interest of 5.7%, maturing June 20, 2022 7,167 — Sub-total 49,985 84,124 Less debt issuance costs, net (62 ) (207 ) Grand total 49,923 83,917 Less current portion (33,371 ) (23,589 ) Non-current portion $ 16,552 $ 60,328 Bank Acceptance Notes Payable Bank acceptance notes issued to vendors with a zero percent interest rate $ 6,310 $ 4,628
Schedule of Maturities of Long-term Debt [Table Text Block]	2020 $ 33,371 2021 10,838 2022 5,714 Total outstanding $ 49,923

Note L - Convertible Senior N_2

Note L - Convertible Senior Notes (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Convertible Debt [Table Text Block]	December 31, 2019 Principal $ 80,500 Unamortized debt issuance costs (3,459 ) Net carrying amount $ 77,041
Interest Income and Interest Expense Disclosure [Table Text Block]	Three months ended December 31, Year ended December 31, 2019 2018 2019 2018 Contractual interest expense 984 — 3,276 — Amortization of debt issuance costs 207 — 681 — Total interest cost $ 1,191 $ — $ 3,957 $ — Effective interest rate 5.1 % 0 % 5.1 % 0 %

Note M - Accrued Liabilities (T

Note M - Accrued Liabilities (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Schedule of Accrued Liabilities [Table Text Block]	December 31, 2019 December 31, 2018 Accrued payroll $ 11,009 $ 10,772 Accrued rent — 1,200 Accrued employee benefits 2,288 2,862 Accrued state and local taxes 1,215 1,088 Accrued interest 1,208 163 Advance payments 312 426 Accrued product warranty 821 995 Accrued commission expenses 420 398 Accrued professional fees 222 315 Accrued capital expenditures — 371 Accrued other 369 701 Total accrued liabilities $ 17,864 $ 19,291

Note N - Other Income and Exp_2

Note N - Other Income and Expense (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Schedule of Other Nonoperating Income (Expense) [Table Text Block]	Year ended December 31, 2019 2018 2017 Foreign exchange transaction gain (loss) $ 20 $ 663 $ (2,012 ) Government subsidy income 1,614 934 211 Other non-operating gain 219 224 110 Loss on disposal of assets (13 ) (7 ) (97 ) Total other income (expense), net $ 1,840 $ 1,814 $ (1,788 )

Note O - Income Taxes (Tables)

Note O - Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]	Year ended December 31, 2019 2018 2017 Domestic $ (35,279 ) $ (11,444 ) 17,497 Foreign (16,108 ) 1,666 67,029 Total income (loss) before income taxes $ (51,387 ) $ (9,778 ) 84,526
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	Current: 2019 2018 2017 Federal $ — $ — $ — State 16 80 (292 ) Foreign 97 1,349 10,965 Total $ 113 $ 1,429 $ 10,673 Deferred: Federal $ 16,375 $ (6,391 ) $ 2,015 State 1,716 61 (1,669 ) Foreign (3,542 ) (2,731 ) (444 ) Total $ 14,549 $ (9,061 ) $ (98 ) Income tax (benefit) expense $ 14,662 $ (7,632 ) $ 10,575
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	2019 2018 NOL carryforward $ 21,516 $ 12,049 Inventory reserves 2,385 1,490 AMT credit 172 172 Unrealized gains and losses 96 69 Share-based compensation 528 510 Foreign tax credit 4,599 4,599 Research and development credits 8,264 6,648 Interest 888 208 ASC 842 Assets 1,641 — Other 520 718 Deferred tax assets 40,609 26,463 Less valuation allowance (25,736 ) — Deferred tax assets, net 14,873 26,463 Depreciation and amortization (6,180 ) (4,749 ) ASC 842 Liabilities (1,406 ) — Deferred tax liabilities (7,586 ) (4,749 ) Deferred tax assets, net $ 7,287 $ 21,714
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	2019 2018 2017 Expected taxes at statutory rate $ (10,791 ) $ (2,053 ) $ 29,584 Non-deductible/non-taxable items 962 1,020 1,212 Foreign rate differences 590 (1,043 ) (11,656 ) Foreign permanent differences (671 ) (1,067 ) 416 Increase (decrease) in valuation allowance 25,736 — (1,700 ) Share-based compensation 607 (1,325 ) (10,348 ) Changes in tax rates — (103 ) 2,768 Transition tax adjustment, net of foreign tax credits (1,777 ) 5,067 Research and development credits (1,616 ) (2,022 ) (2,821 ) Uncertain tax positions — — (1,616 ) Foreign other 27 514 — Other, net (182 ) 224 (331 ) Tax (benefit) expense $ 14,662 $ (7,632 ) $ 10,575
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]	2019 2018 2017 Unrecognized tax benefits — January 1 $ 181 $ 181 $ 181 Gross increases — tax positions in prior period — — — Gross decreases — tax positions in prior period — — — Unrecognized tax benefits — December 31 $ 181 $ 181 $ 181

Note P - Share-based Compensa_2

Note P - Share-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2019
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, January 1, 2019 287 $ 10.19 $ 5.31 $ 1,503 Exercised (4 ) 7.79 $ 12.91 3.95 15 Forfeited (2 ) 12.20 6.08 2 Outstanding, December 31, 2019 281 $ 10.21 $ 5.32 3.87 573 Exercisable, December 31, 2019 281 $ 10.21 3.87 573 Vested and expected to vest 281 $ 10.21 3.87 $ 573
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, 2019 826 $ 32.07 $ 12,744 Granted 445 13.30 6 Released (452 ) $ 25.95 25.95 6 Cancelled/Forfeited (49 ) 26.17 584 Outstanding, December 31, 2019 770 25.18 9,143 Vested and expected to vest 770 $ 25.18 $ 9,143
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]	2019 2018 2017 Cost of goods sold $ 772 $ 795 $ 461 Research and development 2,557 2,419 1,496 Sales and marketing 1,070 925 481 General and administrative 7,405 6,981 5,357 Total share-based compensation expense $ 11,804 $ 11,120 $ 7,795 2019 2018 2017 Employee stock options $ — $ 12 $ 853 Restricted stock units 11,804 11,108 6,942 Total share-based compensation expense $ 11,804 $ 11,120 $ 7,795

Note R - Segment and Geograph_2

Note R - Segment and Geographic Information (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Revenue from External Customers by Geographic Areas [Table Text Block]	For the Years ended December 31, 2019 2018 2017 Revenues: United States $ 9,795 $ 10,795 $ 18,209 Taiwan 97,776 113,547 241,820 China 83,301 143,123 122,300 $ 190,872 $ 267,465 $ 382,329
Long-lived Assets by Geographic Areas [Table Text Block]	As of December 31, 2019 2018 2017 Long-lived assets: United States $ 94,507 $ 88,815 $ 75,446 Taiwan 73,816 65,451 67,379 China 97,687 89,736 59,929 $ 266,010 $ 244,002 $ 202,754

Note T - Commitments and Cont_2

Note T - Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	Year ended December 31, Amount 2020 $ 1,256 2021 1,181 2022 1,120 2023 1,156 2024 1,090 thereafter 5,040 $ 10,843

Note V - Selected Quarterly F_2

Note V - Selected Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2019
Notes Tables
Quarterly Financial Information [Table Text Block]	First Second Third Fourth Year ended December 31, 2019 Quarter Quarter Quarter Quarter Revenue $ 52,719 $ 43,411 $ 46,084 $ 48,658 Cost of goods sold 40,368 32,873 34,108 37,322 Gross profit 12,351 10,538 11,976 11,336 Gross margin 23.4 % 24.3 % 26.0 % 23.3 % Operating expenses: Research and development 11,185 11,151 10,466 10,597 Sales and marketing 2,595 2,331 2,518 2,615 General and administrative 10,440 10,884 9,988 10,178 Total operating expenses 24,220 24,366 22,972 23,390 Income (loss) from operations (11,869 ) (13,828 ) (10,996 ) (12,054 ) Interest and other income (expense), net (1,079 ) (729 ) 276 (1,109 ) Net income (loss) before taxes (12,948 ) (14,557 ) (10,720 ) (13,163 ) Income tax (expense) benefit 2,474 3,191 1,940 (22,267 ) Net income (loss) $ (10,474 ) $ (11,366 ) $ (8,780 ) $ (35,430 ) Net income (loss) per share—basic $ (0.53 ) $ (0.57 ) $ (0.44 ) $ (1.76 ) Net income (loss) per share—diluted $ (0.53 ) $ (0.57 ) $ (0.44 ) $ (1.76 ) First Second Third Fourth Year ended December 31, 2018 Quarter Quarter Quarter Quarter Revenue $ 65,239 $ 87,822 $ 56,386 $ 58,018 Cost of goods sold 39,403 53,959 38,849 47,481 Gross profit 25,836 33,863 17,537 10,537 Gross margin 39.6 % 38.6 % 31.1 % 18.2 % Operating expenses: Research and development 11,736 12,645 14,180 11,342 Sales and marketing 2,474 2,377 2,370 1,920 General and administrative 9,456 9,898 10,591 9,552 Total operating expenses 23,666 24,920 27,141 22,814 Income from operations 2,170 8,943 (9,604 ) (12,277 ) Interest and other expense, net (1,046 ) 1,387 578 71 Net income before taxes 1,124 10,330 (9,026 ) (12,206 ) Income tax (expense) benefit 996 (2,296 ) 5,294 3,638 Net income $ 2,120 $ 8,034 $ (3,732 ) $ (8,568 ) Net income per share—basic $ 0.11 $ 0.41 $ (0.19 ) $ (0.43 ) Net income per share—diluted $ 0.11 $ 0.40 $ (0.19 ) $ (0.43 )

Note B - Summary of Significa_3

Note B - Summary of Significant Accounting Policies (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Cash and Cash Equivalents, at Carrying Value, Ending Balance	$ 59,977	$ 55,646
Cash, Uninsured Amount	$ 51,300
Number of Patents Issued	291
Asset Impairment Charges, Total	$ 0	0
Product Warranty Accrual, Current	821	995
Advertising Expense	$ 500	$ 500	$ 300
Minimum [Member]
Product Warranty Extension Period	3 years
Maximum [Member]
Product Warranty Extension Period	5 years
Patents [Member] | Minimum [Member]
Finite-Lived Intangible Asset, Useful Life	10 years
Patents [Member] | Maximum [Member]
Finite-Lived Intangible Asset, Useful Life	20 years
Customer Concentration Risk [Member] | Revenue Benchmark [Member]
Number of Customers	5	5	5
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Five Customers [Member]
Concentration Risk, Percentage	80.70%	85.70%	86.10%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Microsoft [Member]
Concentration Risk, Percentage	32.20%	22.10%	13.80%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Amazon [Member]
Concentration Risk, Percentage	24.00%	12.10%	35.40%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Facebook [Member]
Concentration Risk, Percentage	10.90%	38.30%	28.60%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Cisco [Member]
Concentration Risk, Percentage	10.00%	9.90%	4.80%
Customer Concentration Risk [Member] | Accounts Receivable [Member]
Number of Customers	5	5
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Five Customers [Member]
Concentration Risk, Percentage	82.00%	70.20%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Microsoft [Member]
Concentration Risk, Percentage	33.00%	23.20%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Amazon [Member]
Concentration Risk, Percentage		18.70%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Facebook [Member]
Concentration Risk, Percentage		12.60%
Non-US [Member]
Cash and Cash Equivalents, at Carrying Value, Ending Balance	$ 15,100	$ 8,000

Note B - Summary of Significa_4

Note B - Summary of Significant Accounting Policies - Property, Plant and Equipment (Details)	12 Months Ended
	Dec. 31, 2019
Land Improvements [Member]
Useful lives (Year)	10 years
Vehicles [Member]
Useful lives (Year)	5 years
Minimum [Member] | Building [Member]
Useful lives (Year)	20 years
Minimum [Member] | Machinery and Equipment [Member]
Useful lives (Year)	2 years
Minimum [Member] | Furniture and Fixtures [Member]
Useful lives (Year)	3 years
Minimum [Member] | Computer Equipment and Software [Member]
Useful lives (Year)	3 years
Maximum [Member] | Building [Member]
Useful lives (Year)	42 years
Maximum [Member] | Machinery and Equipment [Member]
Useful lives (Year)	20 years
Maximum [Member] | Furniture and Fixtures [Member]
Useful lives (Year)	7 years
Maximum [Member] | Computer Equipment and Software [Member]
Useful lives (Year)	10 years

Note C - Revenue Recognition -

Note C - Revenue Recognition - Revenue by Major Product Category (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue from Contract with Customer, Excluding Assessed Tax, Total	$ 48,658	$ 46,084	$ 43,411	$ 52,719	$ 58,018	$ 56,386	$ 87,822	$ 65,239	$ 190,872	$ 267,465	$ 382,329
Percent of Revenue									100.00%	100.00%	100.00%
Data Center [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total									$ 143,563	$ 200,236	$ 306,712
Percent of Revenue									75.20%	74.90%	80.20%
CATV [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total									$ 37,328	$ 51,699	$ 60,756
Percent of Revenue									19.60%	19.30%	15.90%
Telecom [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total									$ 8,429	$ 13,159	$ 12,899
Percent of Revenue									4.40%	4.90%	3.40%
FTTH [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total									$ 190	$ 818	$ 490
Percent of Revenue									0.10%	0.30%	0.10%
Product and Service, Other [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total									$ 1,362	$ 1,553	$ 1,472
Percent of Revenue									0.70%	0.60%	0.40%

Note D - Operating Leases - Com

Note D - Operating Leases - Components of Lease Expense (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)
Operating lease expense	$ 1,229
Financing lease expense	5
Short Term lease expense	111
Total lease expense	$ 1,345
Weighted Average Remaining Lease Term (Years) - operating leases (Year)	9 years 2 months 23 days
Weighted Average Remaining Lease Term (Years) - financing leases (Year)	3 years 9 months 29 days
Weighted Average Discount Rate - operating leases	3.13%
Weighted Average Discount Rate - financing leases	5.00%
Operating cash flows from operating leases	$ 1,325
Operating cash flows from financing lease	8
Financing cash flows from financing lease	2
Right-of-use assets obtained in exchange for new operating lease liabilities	64
Right-of-use assets obtained in exchange for new finance lease liabilities	$ 124

Note D - Operating Leases - Mat

Note D - Operating Leases - Maturities of Lease Liabilities (Details) $ in Thousands	Dec. 31, 2019USD ($)
2020, operating leases	$ 1,234
2020, financing leases	22
2021, operating leases	1,159
2021, financing leases	22
2022, operating leases	1,098
2022, financing leases	22
2023, operating leases	1,091
2023, financing leases	65
2024, operating leases	1,090
2024, financing leases	0
2025 and thereafter, operating leases	5,040
2025 and thereafter, financing leases	0
Total operating lease payments	10,712
Total financing lease payments	131
Less imputed interest, operating leases	(1,764)
Less imputed interest, financing leases	(14)
Present value, operating leases	8,948
Present value, financing leases	$ 117

Note E - Cash, Cash Equivalen_3

Note E - Cash, Cash Equivalents and Restricted Cash (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Restricted Cash and Cash Equivalents, Current, Total	$ 7,051	$ 2,358
CHINA
Certificates of Deposit, at Carrying Value	4,200	0
Bankers Acceptance [Member]
Restricted Cash and Cash Equivalents, Current, Total	$ 1,900	$ 2,400

Note E - Cash, Cash Equivalen_4

Note E - Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash and cash equivalents	$ 59,977	$ 55,646
Restricted cash	7,051	2,358
Total cash, cash equivalents and restricted cash shown in the statement of cash flows	$ 67,028	$ 58,004	$ 83,948	$ 51,964

Note F - Earnings Per Share - C

Note F - Earnings Per Share - Computation of Basic and Diluted Net Income (Loss) per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net income (loss)	$ (35,430)	$ (8,780)	$ (11,366)	$ (10,474)	$ (8,568)	$ (3,732)	$ 8,034	$ 2,120	$ (66,049)	$ (2,146)	$ 73,951
Basic (in shares)									19,982,363	19,646,646	19,097,355
Effect of dilutive options and restricted stock units (in shares)									0	0	1,042,000
Diluted (in shares)									19,982,363	19,646,646	20,139,105
Basic (in dollars per share)	$ (1.76)	$ (0.44)	$ (0.57)	$ (0.53)	$ (0.43)	$ (0.19)	$ 0.41	$ 0.11	$ (3.31)	$ (0.11)	$ 3.87
Diluted (in dollars per share)	$ (1.76)	$ (0.44)	$ (0.57)	$ (0.53)	$ (0.43)	$ (0.19)	$ 0.40	$ 0.11	$ (3.31)	$ (0.11)	$ 3.67

Note F - Earnings Per Share - P

Note F - Earnings Per Share - Potentially Dilutive Securities Excluded from Diluted Net Income (Loss) per Share (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Total antidilutive shares (in shares)	4,632	380
Share-based Payment Arrangement, Option [Member]
Total antidilutive shares (in shares)	44	263
Restricted Stock Units (RSUs) [Member]
Total antidilutive shares (in shares)	1	117
Convertible Debt Securities [Member]
Total antidilutive shares (in shares)	4,587	0

Note G - Inventories (Details T

Note G - Inventories (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Inventory, LIFO Reserve, Period Charge	$ 6,774	$ 7,166	$ 1,866
Inventory Write-down	$ 13,400	$ 12,300	$ 6,800

Note G - Inventories - Inventor

Note G - Inventories - Inventories (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Raw materials	$ 15,570	$ 30,214
Work in process and sub-assemblies	50,787	49,192
Finished goods	18,671	13,850
Total inventory	$ 85,028	$ 93,256

Note H - Property, Plant and _3

Note H - Property, Plant and Equipment (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Depreciation, Total	$ 23.5	$ 29.2	$ 19.9

Note H - Property, Plant and _4

Note H - Property, Plant and Equipment - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Property, plant and equipment, gross	$ 338,385	$ 311,894
Less accumulated depreciation and amortization	(116,979)	(95,233)
Property, plant and equipment, net before construction in progress and land	221,406	216,661
Property, plant and equipment, net	248,444	234,211
Land Improvements [Member]
Property, plant and equipment, gross	806	806
Building and Building Improvements [Member]
Property, plant and equipment, gross	83,846	80,960
Machinery and Equipment [Member]
Property, plant and equipment, gross	237,464	214,718
Furniture and Fixtures [Member]
Property, plant and equipment, gross	5,105	5,043
Computer Equipment and Software [Member]
Property, plant and equipment, gross	10,506	9,709
Vehicles [Member]
Property, plant and equipment, gross	658	658
Construction in Progress [Member]
Property, plant and equipment, net	25,937	16,449
Land [Member]
Property, plant and equipment, net	$ 1,101	$ 1,101

Note I - Intangible Assets (Det

Note I - Intangible Assets (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Amortization of Intangible Assets, Total	$ 0.5	$ 0.5	$ 0.5
Finite-Lived Intangible Assets, Remaining Amortization Period	7 years

Note I - Intangible Assets - In

Note I - Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Intangible assets, gross amount	$ 7,655	$ 6,998
Intangible assets, accumulated amortization	(3,574)	(3,021)
Intangible assets, net	4,081	3,977
Patents [Member]
Intangible assets, gross amount	7,638	6,983
Intangible assets, accumulated amortization	(3,560)	(3,008)
Intangible assets, net	4,078	3,975
Trademarks [Member]
Intangible assets, gross amount	17	15
Intangible assets, accumulated amortization	(14)	(13)
Intangible assets, net	$ 3	$ 2

Note I - Intangible Assets - Fu

Note I - Intangible Assets - Future Amortization Expense (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
2020	$ 537
2021	537
2022	537
2023	537
2024	537
thereafter	1,396
	$ 4,081	$ 3,977

Note J - Fair Value of Financ_3

Note J - Fair Value of Financial Instruments - Financial Instruments Measured at Fair Value on a Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Cash and cash equivalents	$ 59,977	$ 55,646
Restricted cash	7,051	2,358
Total assets	67,028	58,004
Bank Acceptances Executed and Outstanding	6,310	4,628
Convertible senior notes	77,191
Total liabilities	83,501	4,628
Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalents	59,977	55,646
Restricted cash	7,051	2,358
Total assets	67,028	58,004
Bank Acceptances Executed and Outstanding	0	0
Convertible senior notes	0
Total liabilities	0	0
Fair Value, Inputs, Level 2 [Member]
Cash and cash equivalents	0	0
Restricted cash	0	0
Total assets	0	0
Bank Acceptances Executed and Outstanding	6,310	4,628
Convertible senior notes	77,191
Total liabilities	83,501	4,628
Fair Value, Inputs, Level 3 [Member]
Cash and cash equivalents	0	0
Restricted cash	0	0
Total assets	0	0
Bank Acceptances Executed and Outstanding	0	0
Convertible senior notes	0
Total liabilities	$ 0	$ 0

Note K - Notes Payable and Lo_3

Note K - Notes Payable and Long-term Debt (Details Textual)

Sep. 30, 2019USD ($)

Jul. 23, 2019USD ($)

Jun. 21, 2019USD ($)

May 24, 2019USD ($)

May 08, 2019USD ($)

May 07, 2019USD ($)

Apr. 30, 2019USD ($)

Apr. 19, 2019USD ($)

Apr. 11, 2019USD ($)

Mar. 05, 2019USD ($)

Jan. 21, 2019USD ($)

Jan. 21, 2019TWD ($)

Dec. 11, 2018USD ($)

Nov. 29, 2018USD ($)

Nov. 29, 2018TWD ($)

Oct. 03, 2018USD ($)

Jun. 19, 2018USD ($)

Mar. 30, 2018USD ($)

Sep. 28, 2017USD ($)

Dec. 31, 2018USD ($)

Dec. 31, 2019USD ($)

Jul. 23, 2019TWD ($)

Jun. 21, 2019CNY (¥)

May 24, 2019CNY (¥)

May 07, 2019CNY (¥)

Apr. 30, 2019CNY (¥)

Apr. 19, 2019CNY (¥)

Apr. 11, 2019TWD ($)

Jan. 21, 2019TWD ($)

Dec. 11, 2018TWD ($)

Nov. 29, 2018TWD ($)

Sep. 21, 2018USD ($)

Sep. 21, 2018CNY (¥)

Jun. 19, 2018TWD ($)

Long-term Debt, Gross

$ 84,124,000

$ 49,985,000

Debt Instrument, Unused Borrowing Capacity, Amount

$ 69,400,000

$ 48,800,000

LIBOR Rate

2.50%

1.76%

Cash Collateral for Borrowed Securities

$ 2,400,000

Chailease Finance Co, Ltd. [Member] | Promissory Note [Member]

Debt Instrument, Interest Rate, Stated Percentage

3.40%

3.40%

Long-term Debt, Gross

$ 6,331,000

$ 4,262,000

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

Debt Instrument, Face Amount

$ 6,800,000

$ 210,601,605

Long-term Debt, Gross

4,300,000

Prime World International Holdings, Ltd. (“Prime World”) [Member] | Chailease Finance Co, Ltd. [Member] | Finance Lease Agreement 2 [Member]

Sale Leaseback Transaction, Net Proceeds, Investing Activities, Total

$ 8,700,000

$ 267,340,468

Sale Leaseback Transaction, Term

3 years

3 years

Sale Leaseback Transaction, Initial Payment

$ 2,200,000

$ 67,340,468

Sale Leaseback Transaction, Imputed Interest Rate

3.50%

3.50%

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

Sale Leaseback Transaction, Net Proceeds, Investing Activities, Total

$ 8,700,000

$ 267,333,186

Sale Leaseback Transaction, Term

3 years

3 years

Sale Leaseback Transaction, Initial Payment

$ 2,200,000

$ 67,333,186

Sale Leaseback Transaction, Imputed Interest Rate

3.10%

3.10%

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

Debt Instrument, Face Amount

$ 6,800,000

$ 209,555,736

Long-term Debt, Gross

4,600,000

Minimum [Member] | Prime World International Holdings, Ltd. (“Prime World”) [Member] | Chailease Finance Co, Ltd. [Member] | Finance Lease Agreement 2 [Member]

Sale Leaseback Transaction, Monthly Rental Payments

$ 200,000

$ 5,571,229

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

Sale Leaseback Transaction, Monthly Rental Payments

200,000

$ 5,570,167

Maximum [Member] | Prime World International Holdings, Ltd. (“Prime World”) [Member] | Chailease Finance Co, Ltd. [Member] | Finance Lease Agreement 2 [Member]

Sale Leaseback Transaction, Monthly Rental Payments

$ 200,000

$ 6,139,188

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

Sale Leaseback Transaction, Monthly Rental Payments

$ 200,000

$ 6,082,131

Branch Banking and Trust Company [Member] | CapEx Loan [Member]

Debt Instrument, Face Amount

$ 26,000,000

Debt Instrument, Term

5 years

Long-term Debt, Gross

19,164,000

0

Branch Banking and Trust Company [Member] | Term Loan [Member]

Debt Instrument, Face Amount

$ 21,500,000

Debt Instrument, Term

70 months

Long-term Debt, Gross

$ 20,067,000

$ 0

Branch Banking and Trust Company [Member] | CapEx Loan and Term Loan [Member]

Repayments of Long-term Debt, Total

$ 37,800,000

Branch Banking and Trust Company [Member] | London Interbank Offered Rate (LIBOR) [Member] | CapEx Loan [Member]

Debt Instrument, Basis Spread on Variable Rate

1.30%

Branch Banking and Trust Company [Member] | London Interbank Offered Rate (LIBOR) [Member] | CapEx Loan [Member] | Minimum [Member]

Debt Instrument, Basis Spread on Variable Rate

1.30%

Branch Banking and Trust Company [Member] | London Interbank Offered Rate (LIBOR) [Member] | CapEx Loan [Member] | Maximum [Member]

Debt Instrument, Basis Spread on Variable Rate

2.00%

Branch Banking and Trust Company [Member] | London Interbank Offered Rate (LIBOR) [Member] | Term Loan [Member]

Debt Instrument, Basis Spread on Variable Rate

1.15%

Branch Banking and Trust Company [Member] | London Interbank Offered Rate (LIBOR) [Member] | Term Loan [Member] | Minimum [Member]

Debt Instrument, Basis Spread on Variable Rate

1.15%

Branch Banking and Trust Company [Member] | London Interbank Offered Rate (LIBOR) [Member] | Term Loan [Member] | Maximum [Member]

Debt Instrument, Basis Spread on Variable Rate

2.00%

Far Eastern [Member] | Far Eastern's Published One-Year Fixed Term Time Deposits Rate [Member] | Far Eastern Credit Facility [Member]

Debt Instrument, Basis Spread on Variable Rate

0.655%

Debt Instrument, Interest Rate, Effective Percentage

1.045%

Far Eastern [Member] | TAIFX3 Rate [Member] | Far Eastern Credit Facility [Member]

Debt Instrument, Basis Spread on Variable Rate

0.70%

Debt Instrument, Interest Rate, Effective Percentage

2.75%

SPD Bank [Member] | The SPD 30M Credit Facility [Member]

Debt Instrument, Interest Rate, Stated Percentage

4.32%

4.32%

SPD Bank [Member] | The $2M Credit Facility [Member]

Debt Instrument, Interest Rate, Stated Percentage

2.59438%

SPD Bank [Member] | London Interbank Offered Rate (LIBOR) [Member] | The $2M Credit Facility [Member]

Debt Instrument, Basis Spread on Variable Rate

1.48%

SPD Bank [Member] | Prime Rate [Member] | The SPD 9.9M Credit Facility [Member]

Debt Instrument, Basis Spread on Variable Rate

0.2475%

SPD Bank [Member] | Prime Rate [Member] | The SPD 30M Credit Facility [Member]

Debt Instrument, Basis Spread on Variable Rate

0.2475%

Revolving Credit Facility [Member] | Branch Banking and Trust Company [Member]

Line of Credit Facility, Maximum Borrowing Capacity

$ 20,000,000

$ 25,000,000

$ 60,000,000

$ 50,000,000

Debt Instrument, Term

3 years

Debt Instrument, Unused Borrowing Capacity, Fee, Percentage

0.30%

0.20%

Line of Credit Facility, Percentage of Maximum Borrowing Capacity, Threshold for Financial Covenants

75.00%

60.00%

Fixed Charge Cover Ratio, Minimum Threshold

1.5

Long-term Line of Credit, Total

$ 20,000,000

Revolving Credit Facility [Member] | Branch Banking and Trust Company [Member] | London Interbank Offered Rate (LIBOR) [Member]

Debt Instrument, Basis Spread on Variable Rate

1.50%

Revolving Credit Facility [Member] | Branch Banking and Trust Company [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]

Debt Instrument, Basis Spread on Variable Rate

1.40%

Revolving Credit Facility [Member] | Branch Banking and Trust Company [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]

Debt Instrument, Basis Spread on Variable Rate

2.00%

Revolving Credit Facility [Member] | Taishin International Bank [Member]

Line of Credit Facility, Maximum Borrowing Capacity

$ 9,767,000

Debt Instrument, Interest Rate, Stated Percentage

2.00%

Long-term Debt, Gross

$ 3,256,000

Revolving Credit Facility [Member] | Taishin International Bank [Member] | Prime World International Holdings, Ltd. (“Prime World”) [Member]

Line of Credit Facility, Maximum Borrowing Capacity

$ 9,700,000

$ 300,000,000

Revolving Credit Facility [Member] | Taishin International Bank [Member] | Minimum [Member] | Prime World International Holdings, Ltd. (“Prime World”) [Member]

Debt Instrument, Term of Draw

90 days

Debt Instrument, Interest Rate, Stated Percentage

2.00%

2.00%

Revolving Credit Facility [Member] | Taishin International Bank [Member] | Maximum [Member] | Prime World International Holdings, Ltd. (“Prime World”) [Member]

Debt Instrument, Term of Draw

120 days

Debt Instrument, Interest Rate, Stated Percentage

1.95%

1.95%

Revolving Credit Facility [Member] | Taishin International Bank [Member] | The NT$100M Credit Line [Member] | Prime World International Holdings, Ltd. (“Prime World”) [Member]

Line of Credit Facility, Maximum Borrowing Capacity

$ 3,300,000

$ 100,000,000

Debt Instrument, Term

1 year

Revolving Credit Facility [Member] | Taishin International Bank [Member] | The US $1M Credit Line [Member] | Prime World International Holdings, Ltd. (“Prime World”) [Member]

Line of Credit Facility, Maximum Borrowing Capacity

$ 1,000,000

Revolving Credit Facility [Member] | Taishin International Bank [Member] | Credit Facility [Member]

Line of Credit Facility, Maximum Borrowing Capacity

$ 3,336,000

Debt Instrument, Interest Rate, Stated Percentage

2.20%

Long-term Debt, Gross

0

$ 3,336,000

Revolving Credit Facility [Member] | Taishin International Bank [Member] | Credit Facility [Member] | Prime World International Holdings, Ltd. (“Prime World”) [Member]

Long-term Line of Credit, Total

3,300,000

Revolving Credit Facility [Member] | Taishin International Bank [Member] | Credit Facility [Member] | Minimum [Member] | Prime World International Holdings, Ltd. (“Prime World”) [Member]

Debt Instrument, Term of Draw

90 days

Debt Instrument, Interest Rate, Stated Percentage

2.20%

2.20%

Revolving Credit Facility [Member] | Taishin International Bank [Member] | Credit Facility [Member] | Maximum [Member] | Prime World International Holdings, Ltd. (“Prime World”) [Member]

Debt Instrument, Term of Draw

120 days

Debt Instrument, Interest Rate, Stated Percentage

2.25%

2.25%

Revolving Credit Facility [Member] | Development Bank of Singapore (Taiwan) Ltd. [Member]

Line of Credit Facility, Maximum Borrowing Capacity

7,000,000

Long-term Debt, Gross

$ 3,550,000

0

Revolving Credit Facility [Member] | Development Bank of Singapore (Taiwan) Ltd. [Member] | Prime World International Holdings, Ltd. (“Prime World”) [Member]

Line of Credit Facility, Maximum Borrowing Capacity

$ 7,000,000

Cost of Funds Rate for New Taiwan Dollars

0.77%

Cost of Funds Rate for US Dollars

2.54%

Revolving Credit Facility [Member] | Development Bank of Singapore (Taiwan) Ltd. [Member] | Minimum [Member]

Debt Instrument, Interest Rate, Stated Percentage

1.50%

Revolving Credit Facility [Member] | Development Bank of Singapore (Taiwan) Ltd. [Member] | Minimum [Member] | Prime World International Holdings, Ltd. (“Prime World”) [Member]

Debt Instrument, Term of Draw

60 years

Revolving Credit Facility [Member] | Development Bank of Singapore (Taiwan) Ltd. [Member] | Maximum [Member]

Debt Instrument, Interest Rate, Stated Percentage

3.50%

Revolving Credit Facility [Member] | Development Bank of Singapore (Taiwan) Ltd. [Member] | Maximum [Member] | Prime World International Holdings, Ltd. (“Prime World”) [Member]

Debt Instrument, Term of Draw

90 years

Revolving Credit Facility [Member] | Development Bank of Singapore (Taiwan) Ltd. [Member] | Cost of Funds Rate for US Dollars [Member] | Prime World International Holdings, Ltd. (“Prime World”) [Member]

Debt Instrument, Basis Spread on Variable Rate

1.25%

Revolving Credit Facility [Member] | Development Bank of Singapore (Taiwan) Ltd. [Member] | Cost of Funds Rate for New Taiwan Dollars [Member] | Prime World International Holdings, Ltd. (“Prime World”) [Member]

Debt Instrument, Basis Spread on Variable Rate

1.35%

Revolving Credit Facility [Member] | CTBC Bank Co., Ltd. [Member] | Credit Facility with CTBC Bank Co., Ltd [Member] | Prime World International Holdings, Ltd. (“Prime World”) [Member]

Line of Credit Facility, Maximum Borrowing Capacity

$ 4,900,000

$ 150,000,000

Debt Instrument, Term

1 year

Debt Instrument, Term of Draw

120 days

Revolving Credit Facility [Member] | CTBC Bank Co., Ltd. [Member] | Enterprise Swap Index Rate [Member] | Credit Facility with CTBC Bank Co., Ltd [Member] | Prime World International Holdings, Ltd. (“Prime World”) [Member]

Debt Instrument, Basis Spread on Variable Rate

1.20%

Debt Instrument, Interest Rate, Effective Percentage

0.69%

0.69%

Revolving Credit Facility [Member] | CTBC Bank Co., Ltd. [Member] | Cost of Funds Rate [Member] | Credit Facility with CTBC Bank Co., Ltd [Member] | Prime World International Holdings, Ltd. (“Prime World”) [Member]

Debt Instrument, Basis Spread on Variable Rate

1.20%

Debt Instrument, Interest Rate, Effective Percentage

3.40%

3.40%

Revolving Credit Facility [Member] | Far Eastern [Member]

Line of Credit Facility, Maximum Borrowing Capacity

$ 2,668,000

Debt Instrument, Interest Rate, Stated Percentage

1.70%

Long-term Debt, Gross

$ 0

$ 2,668,000

Revolving Credit Facility [Member] | Far Eastern [Member] | Far Eastern Credit Facility [Member] | Prime World International Holdings, Ltd. (“Prime World”) [Member]

Line of Credit Facility, Maximum Borrowing Capacity

$ 2,600,000

$ 80,000,000

Debt Instrument, Term

1 year

Long-term Line of Credit, Total

2,700,000

Debt Instrument, Term of Draw

180 days

Revolving Credit Facility [Member] | China Construction Bank Co., Ltd. [Member]

Long-term Debt, Gross

8,652,000

0

Revolving Credit Facility [Member] | China Construction Bank Co., Ltd. [Member] | Global Technology, Inc. [Member]

Line of Credit Facility, Maximum Borrowing Capacity

$ 18,600,000

¥ 129,000,000

Revolving Credit Facility [Member] | China Construction Bank Co., Ltd. [Member] | China Merchants Credit Line [Member] | Global Technology, Inc. [Member]

Line of Credit Facility, Maximum Borrowing Capacity

$ 8,900,000

¥ 60,000,000

Debt Instrument, Term

12 months

Long-term Line of Credit, Total

0

Bank Acceptances Executed

100,000

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

Line of Credit Facility, Maximum Borrowing Capacity

$ 25,449,000

Debt Instrument, Interest Rate, Stated Percentage

4.57%

Long-term Debt, Gross

0

$ 7,919,000

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

Line of Credit Facility, Maximum Borrowing Capacity

$ 1,500,000

¥ 9,900,000

Debt Instrument, Term

1 year

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

Line of Credit Facility, Maximum Borrowing Capacity

$ 4,500,000

¥ 30,000,000

Debt Instrument, Term

1 year

Revolving Credit Facility [Member] | SPD Bank [Member] | The $2M Credit Facility [Member] | Global Technology, Inc. [Member]

Line of Credit Facility, Maximum Borrowing Capacity

$ 2,000,000

Debt Instrument, Term

6 months

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

Line of Credit Facility, Maximum Borrowing Capacity

$ 25,400,000

¥ 180,000,000

Debt Instrument, Term

5 years

Long-term Line of Credit, Total

7,900,000

Bank Acceptances Executed and Outstanding

5,500,000

Revolving Credit Facility [Member] | China Zheshang Bank Co., Ltd [Member]

Line of Credit Facility, Maximum Borrowing Capacity

$ 7,167,000

Debt Instrument, Interest Rate, Stated Percentage

5.70%

Long-term Debt, Gross

$ 0

$ 7,167,000

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

Line of Credit Facility, Maximum Borrowing Capacity

$ 14,100,000

¥ 100,000,000

Debt Instrument, Term

18 months

Long-term Line of Credit, Total

0

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

Line of Credit Facility, Maximum Borrowing Capacity

$ 7,100,000

¥ 50,000,000

Debt Instrument, Term

3 years

Long-term Line of Credit, Total

7,200,000

Bank Acceptances Executed and Outstanding

$ 800,000

Note K - Notes Payable and Lo_4

Note K - Notes Payable and Long-term Debt - Schedule of Notes Payable and Long-term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Revolving line of credit with a U.S. bank up to $20,000 (2019) and $60,000 (2018) with interest at LIBOR plus 1.5% (2019) and 1.4% (2018), maturing April 2, 2021	$ 49,985	$ 84,124
Less debt issuance costs, net	62	207
Grand total	49,923	83,917
Less current portion	33,371	23,589
Non-current portion	16,552	60,328
Bank acceptance notes issued to vendors with a zero percent interest rate	6,310	4,628
Chailease Finance Co, Ltd. [Member] | Promissory Note [Member]
Revolving line of credit with a U.S. bank up to $20,000 (2019) and $60,000 (2018) with interest at LIBOR plus 1.5% (2019) and 1.4% (2018), maturing April 2, 2021	4,262	6,331
Chailease Finance Co, Ltd. [Member] | Promissory Note 2 [Member]
Revolving line of credit with a U.S. bank up to $20,000 (2019) and $60,000 (2018) with interest at LIBOR plus 1.5% (2019) and 1.4% (2018), maturing April 2, 2021	4,633	0
Branch Banking and Trust Company [Member] | Term Loan [Member]
Revolving line of credit with a U.S. bank up to $20,000 (2019) and $60,000 (2018) with interest at LIBOR plus 1.5% (2019) and 1.4% (2018), maturing April 2, 2021	0	20,067
Branch Banking and Trust Company [Member] | CapEx Loan [Member]
Revolving line of credit with a U.S. bank up to $20,000 (2019) and $60,000 (2018) with interest at LIBOR plus 1.5% (2019) and 1.4% (2018), maturing April 2, 2021	0	19,164
Revolving Credit Facility [Member] | Branch Banking and Trust Company [Member] | Third Amendment to Loan Agreement with BB and T [Member]
Revolving line of credit with a U.S. bank up to $20,000 (2019) and $60,000 (2018) with interest at LIBOR plus 1.5% (2019) and 1.4% (2018), maturing April 2, 2021	20,000	23,104
Revolving Credit Facility [Member] | Taishin International Bank [Member]
Revolving line of credit with a U.S. bank up to $20,000 (2019) and $60,000 (2018) with interest at LIBOR plus 1.5% (2019) and 1.4% (2018), maturing April 2, 2021		3,256
Revolving Credit Facility [Member] | Taishin International Bank [Member] | Credit Facility [Member]
Revolving line of credit with a U.S. bank up to $20,000 (2019) and $60,000 (2018) with interest at LIBOR plus 1.5% (2019) and 1.4% (2018), maturing April 2, 2021	3,336	0
Revolving Credit Facility [Member] | Development Bank of Singapore (Taiwan) Ltd. [Member]
Revolving line of credit with a U.S. bank up to $20,000 (2019) and $60,000 (2018) with interest at LIBOR plus 1.5% (2019) and 1.4% (2018), maturing April 2, 2021	0	3,550
Revolving Credit Facility [Member] | Far Eastern [Member]
Revolving line of credit with a U.S. bank up to $20,000 (2019) and $60,000 (2018) with interest at LIBOR plus 1.5% (2019) and 1.4% (2018), maturing April 2, 2021	2,668	0
Revolving Credit Facility [Member] | China Construction Bank Co., Ltd. [Member]
Revolving line of credit with a U.S. bank up to $20,000 (2019) and $60,000 (2018) with interest at LIBOR plus 1.5% (2019) and 1.4% (2018), maturing April 2, 2021	0	8,652
Revolving Credit Facility [Member] | SPD Bank [Member]
Revolving line of credit with a U.S. bank up to $20,000 (2019) and $60,000 (2018) with interest at LIBOR plus 1.5% (2019) and 1.4% (2018), maturing April 2, 2021	7,919	0
Revolving Credit Facility [Member] | China Zheshang Bank Co., Ltd [Member]
Revolving line of credit with a U.S. bank up to $20,000 (2019) and $60,000 (2018) with interest at LIBOR plus 1.5% (2019) and 1.4% (2018), maturing April 2, 2021	$ 7,167	$ 0

Note K - Notes Payable and Lo_5

Note K - Notes Payable and Long-term Debt - Schedule of Notes Payable and Long-term Debt (Details) (Parentheticals) - USD ($)	Mar. 30, 2018	Sep. 28, 2017	Dec. 31, 2019	Dec. 31, 2018	Sep. 30, 2019	Mar. 05, 2019
Chailease Finance Co, Ltd. [Member] | Promissory Note [Member]
Long-term debt, maturity date			Nov. 30, 2021	Nov. 30, 2021
Long-term debt, interest			3.40%	3.40%
Chailease Finance Co, Ltd. [Member] | Promissory Note 2 [Member]
Long-term debt, maturity date			Jan. 21, 2022
Long-term debt, interest			3.10%
Branch Banking and Trust Company [Member] | Revolving Credit Facility [Member]
Long-term debt, maximum	$ 60,000,000	$ 50,000,000			$ 20,000,000	$ 25,000,000
Taishin International Bank [Member] | Revolving Credit Facility [Member]
Long-term debt, maturity date				May 31, 2019
Long-term debt, maximum				$ 9,767,000
Long-term debt, interest				2.00%
Development Bank of Singapore (Taiwan) Ltd. [Member] | Revolving Credit Facility [Member]
Long-term debt, maturity date				Jul. 26, 2019
Long-term debt, maximum				$ 7,000,000
Development Bank of Singapore (Taiwan) Ltd. [Member] | Revolving Credit Facility [Member] | Minimum [Member]
Long-term debt, interest				1.50%
Development Bank of Singapore (Taiwan) Ltd. [Member] | Revolving Credit Facility [Member] | Maximum [Member]
Long-term debt, interest				3.50%
Far Eastern [Member] | Revolving Credit Facility [Member]
Long-term debt, maturity date			Apr. 11, 2020
Long-term debt, maximum			$ 2,668,000
Long-term debt, interest			1.70%
SPD Bank [Member] | Revolving Credit Facility [Member]
Long-term debt, maturity date			May 24, 2024
Long-term debt, maximum			$ 25,449,000
Long-term debt, interest			4.57%
China Zheshang Bank Co., Ltd [Member] | Revolving Credit Facility [Member]
Long-term debt, maturity date			Jun. 20, 2022
Long-term debt, maximum			$ 7,167,000
Long-term debt, interest			5.70%
London Interbank Offered Rate (LIBOR) [Member] | Branch Banking and Trust Company [Member] | Revolving Credit Facility [Member]
Long-term debt, interest		1.50%
London Interbank Offered Rate (LIBOR) [Member] | Branch Banking and Trust Company [Member] | Revolving Credit Facility [Member] | Minimum [Member]
Long-term debt, interest	1.40%
London Interbank Offered Rate (LIBOR) [Member] | Branch Banking and Trust Company [Member] | Revolving Credit Facility [Member] | Maximum [Member]
Long-term debt, interest	2.00%
Term Loan [Member] | Branch Banking and Trust Company [Member]
Long-term debt, maturity date				Apr. 1, 2024
Term Loan [Member] | London Interbank Offered Rate (LIBOR) [Member] | Branch Banking and Trust Company [Member]
Long-term debt, interest				1.15%
Term Loan [Member] | London Interbank Offered Rate (LIBOR) [Member] | Branch Banking and Trust Company [Member] | Minimum [Member]
Long-term debt, interest	1.15%
Term Loan [Member] | London Interbank Offered Rate (LIBOR) [Member] | Branch Banking and Trust Company [Member] | Maximum [Member]
Long-term debt, interest	2.00%
CapEx Loan [Member] | Branch Banking and Trust Company [Member]
Long-term debt, maturity date				Apr. 1, 2023
Long-term debt, maturity date				Dec. 18, 2023
CapEx Loan [Member] | London Interbank Offered Rate (LIBOR) [Member] | Branch Banking and Trust Company [Member]
Long-term debt, interest				1.30%
CapEx Loan [Member] | London Interbank Offered Rate (LIBOR) [Member] | Branch Banking and Trust Company [Member] | Minimum [Member]
Long-term debt, interest	1.30%
CapEx Loan [Member] | London Interbank Offered Rate (LIBOR) [Member] | Branch Banking and Trust Company [Member] | Maximum [Member]
Long-term debt, interest	2.00%
Credit Facility [Member] | Taishin International Bank [Member] | Revolving Credit Facility [Member]
Long-term debt, maturity date			Jul. 31, 2020
Long-term debt, maximum			$ 3,336,000
Long-term debt, interest			2.20%

Note K - Notes Payable and Lo_6

Note K - Notes Payable and Long-term Debt - Maturities of Notes Payable and Long-term Debt (Details) $ in Thousands	Dec. 31, 2019USD ($)
2020	$ 33,371
2021	10,838
2022	5,714
Total outstanding	$ 49,923

Note L - Convertible Senior N_3

Note L - Convertible Senior Notes (Details Textual) - USD ($)	Mar. 05, 2019	Dec. 31, 2019
Branch Banking and Trust Company [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
Debt Instrument, Interest Rate, Stated Percentage	5.00%
Proceeds from Convertible Debt	$ 76,400,000
Debt Conversion, Converted Instrument, Shares Issued	56.9801
Debt Conversion, Converted Instrument, Amount	$ 1,000
Debt Instrument, Convertible, Conversion Price	$ 17.55
Debt Instrument, Convertible, Conversion Price Premium, Percentage	30.00%
Share Price	$ 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 L - Convertible Senior N_4

Note L - Convertible Senior Notes - Schedule of Carrying Value of Convertible Senior Notes (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Mar. 05, 2019	Dec. 31, 2018
Net carrying amount	$ 77,041		$ 0
The 5% Convertible Senior Notes Due 2024 [Member]
Principal	80,500	$ 80,500
Unamortized debt issuance costs	(3,459)
Net carrying amount	$ 77,041

Note L - Convertible Senior N_5

Note L - Convertible Senior Notes - Schedule of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Amortization of debt issuance costs			$ 892	$ 42	$ 81
The 5% Convertible Senior Notes Due 2024 [Member]
Contractual interest expense	$ 984	$ 0	3,276	0
Amortization of debt issuance costs	207	0	681	0
Total interest cost	$ 1,191	$ 0	$ 3,957	$ 0
Effective interest rate	5.10%	0.00%	5.10%	0.00%

Note M - Accrued Liabilities -

Note M - Accrued Liabilities - Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Accrued payroll	$ 11,009	$ 10,772
Accrued rent	0	1,200
Accrued employee benefits	2,288	2,862
Accrued state and local taxes	1,215	1,088
Accrued interest	1,208	163
Advance payments	312	426
Accrued product warranty	821	995
Accrued commission expenses	420	398
Accrued professional fees	222	315
Accrued capital expenditures	0	371
Accrued other	369	701
Total accrued liabilities	$ 17,864	$ 19,291

Note N - Other Income and Exp_3

Note N - Other Income and Expense - Other Income and Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Foreign exchange transaction gain (loss)	$ 20	$ 663	$ (2,012)
Government subsidy income	1,614	934	211
Other non-operating gain	219	224	110
Loss on disposal of assets	(13)	(7)	(97)
Total other income (expense), net	$ 1,840	$ 1,814	$ (1,788)

Note O - Income Taxes (Details

Note O - Income Taxes (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended					132 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Nov. 30, 2011	Nov. 30, 2010	Nov. 30, 2019	Dec. 31, 2016
Deferred Tax Assets, Operating Loss Carryforwards, Total	$ 21,516	$ 12,049
Deferred Tax Assets, in Process Research and Development	8,264	6,648
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	$ 4,599	$ 4,599
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	35.00%
Unrecognized Tax Benefits, Ending Balance	$ 181	$ 181	$ 181				$ 181
Income Tax Examination, Penalties and Interest Accrued, Total	$ 0	0	0
Tax Cuts and Jobs Act, Measurement Period Adjustment, Increase (Decrease) in Effective Tax Rate	0.279
Global Technology, Inc. [Member]
Income Tax Holiday, Aggregate Dollar Amount	$ 1,000	$ 500	$ 1,400
Income Tax Holiday, Income Tax Benefits Per Share	$ 0.05	$ 0.03	$ 0.07
State Administration of Taxation, China [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	25.00%
State Administration of Taxation, China [Member] | Global Technology, Inc. [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent				15.00%	15.00%	15.00%
Domestic Tax Authority [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Total	$ 75,900
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	32,700
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration	43,200
Deferred Tax Assets, in Process Research and Development	$ 8,300
Open Tax Year	2016 2017 2018
Foreign Tax Authority [Member]
Deferred Tax Assets, Tax Credit Carryforwards, Foreign		$ 4,600
Open Tax Year	2010 2011 2012 2013 2014 2015 2016 2017 2018 2019

Note O - Income Taxes - Income

Note O - Income Taxes - Income (Loss) from Operations Before Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Domestic									$ (35,279)	$ (11,444)	$ 17,497
Foreign									(16,108)	1,666	67,029
Total income (loss) before income taxes	$ (13,163)	$ (10,720)	$ (14,557)	$ (12,948)	$ (12,206)	$ (9,026)	$ 10,330	$ 1,124	$ (51,387)	$ (9,778)	$ 84,526

Note O - Income Taxes - Provisi

Note O - Income Taxes - Provision for Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Federal									$ 0	$ 0	$ 0
State									16	80	(292)
Foreign									97	1,349	10,965
Total									113	1,429	10,673
Federal									16,375	(6,391)	2,015
State									1,716	61	(1,669)
Foreign									(3,542)	(2,731)	(444)
Total									14,549	(9,061)	(98)
Income tax (benefit) expense	$ 22,267	$ (1,940)	$ (3,191)	$ (2,474)	$ (3,638)	$ (5,294)	$ 2,296	$ (996)	$ 14,662	$ (7,632)	$ 10,575

Note O - Income Taxes - Net Def

Note O - Income Taxes - Net Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
NOL carryforward	$ 21,516	$ 12,049
Inventory reserves	2,385	1,490
AMT credit	172	172
Unrealized gains and losses	96	69
Share-based compensation	528	510
Foreign tax credit	4,599	4,599
Research and development credits	8,264	6,648
Interest	888	208
ASC 842 Assets	1,641	0
Other	520	718
Deferred tax assets	40,609	26,463
Less valuation allowance	(25,736)	0
Deferred tax assets, net	14,873	26,463
Depreciation and amortization	(6,180)	(4,749)
ASC 842 Liabilities	(1,406)	0
Deferred tax liabilities	(7,586)	(4,749)
Deferred tax assets (liabilities), net	$ 7,287	$ 21,714

Note O - Income Taxes - Reconci

Note O - Income Taxes - Reconciliation of the U.S. Federal Income Tax Rate (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Expected taxes at statutory rate									$ (10,791)	$ (2,053)	$ 29,584
Non-deductible/non-taxable items									962	1,020	1,212
Foreign rate differences									590	(1,043)	(11,656)
Foreign permanent differences									(671)	(1,067)	416
Increase (decrease) in valuation allowance									25,736	0	(1,700)
Share-based compensation									607	(1,325)	(10,348)
Changes in tax rates									0	(103)	2,768
Transition tax adjustment, net of foreign tax credits										(1,777)	5,067
Research and development credits									(1,616)	(2,022)	(2,821)
Uncertain tax positions									0	0	(1,616)
Foreign other									27	514	0
Other, net									(182)	224	(331)
Income tax (benefit) expense	$ 22,267	$ (1,940)	$ (3,191)	$ (2,474)	$ (3,638)	$ (5,294)	$ 2,296	$ (996)	$ 14,662	$ (7,632)	$ 10,575

Note O - Income Taxes - Unrecog

Note O - Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Unrecognized tax benefits	$ 181	$ 181	$ 181
Gross increases — tax positions in prior period	0	0	0
Gross decreases — tax positions in prior period	0	0	0
Unrecognized tax benefits	$ 181	$ 181	$ 181

Note P - Share-based Compensa_3

Note P - Share-based Compensation (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount	$ 0
Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	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%
Restricted Stock Awards and Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding	$ 9,800
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total	$ 16,800
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	1 year 11 months 26 days

Note P - Share-based Compensa_4

Note P - Share-based Compensation - Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Outstanding, number of shares (in shares)	287
Outstanding, weighted average exercise price (in dollars per share)	$ 10.19
Outstanding, weighted average fair value (in dollars per share)	$ 5.32	$ 5.31
Outstanding, aggregate intrinsic value	$ 573	$ 1,503
Exercised, number of shares (in shares)	(4)
Exercised, weighted average exercise price (in dollars per share)	$ 7.79
Exercised, weighted average share price on date of exercise (in dollars per share)	12.91
Exercised, weighted average fair value (in dollars per share)	$ 3.95
Exercised, aggregate intrinsic value	$ 15
Forfeited, number of shares (in shares)	(2)
Forfeited, weighted average exercise price (in dollars per share)	$ 12.20
Forfeited, weighted average fair value (in dollars per share)	$ 6.08
Forfeited, aggregate intrinsic value	$ 2
Outstanding, number of shares (in shares)	281	287
Outstanding, weighted average exercise price (in dollars per share)	$ 10.21	$ 10.19
Outstanding, weighted average remaining contractual life (Year)	3 years 10 months 13 days
Exercisable, number of shares (in shares)	281
Exercisable, weighted average exercise price (in dollars per share)	$ 10.21
Exercisable, weighted average remaining contractual life (Year)	3 years 10 months 13 days
Exercisable, aggregate intrinsic value	$ 573
Vested and expected to vest, number of shares (in shares)	281
Vested and expected to vest, weighted average exercise price (in dollars per share)	$ 10.21
Vested and expected to vest, weighted average remaining contractual life (Year)	3 years 10 months 13 days
Vested and expected to vest, aggregate intrinsic value	$ 573

Note P - Share-based Compensa_5

Note P - Share-based Compensation - Restricted Stock Unit/Awards Activity (Details) - Restricted Stock Units (RSUs) [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Outstanding, number of shares (in shares)	826
Outstanding, weighted average fair value (in dollars per share)	$ 32.07
Outstanding, aggregate intrinsic value	$ 9,143	$ 12,744
Granted, number of shares (in shares)	445
Granted, weighted average fair value (in dollars per share)	$ 13.30
Granted, aggregate intrinsic value	$ 6
Released, number of shares (in shares)	(452)
Released, weighted average share price on date of release (in dollars per share)	$ 25.95
Released, weighted average fair value (in dollars per share)	$ 25.95
Released, aggregate intrinsic value	$ 6
Cancelled/Forfeited, number of shares (in shares)	(49)
Cancelled/Forfeited, weighted average fair value (in dollars per share)	$ 26.17
Cancelled/Forfeited, aggregate intrinsic value	$ 584
Outstanding, number of shares (in shares)	770
Outstanding, weighted average fair value (in dollars per share)	$ 25.18
Vested and expected to vest, number of shares (in shares)	770
Vested and expected to vest, weighted average fair value (in dollars per share)	$ 25.18
Vested and expected to vest, aggregate intrinsic value	$ 9,143

Note P - Share-based Compensa_6

Note P - Share-based Compensation - Share-based Compensation (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Total share-based compensation expense	$ 11,804,000	$ 11,120,000	$ 7,795,000
Share-based Payment Arrangement, Option [Member]
Total share-based compensation expense	0	12,000	853,000
Restricted Stock Units (RSUs) [Member]
Total share-based compensation expense	11,804,000	11,108,000	6,942,000
Shares for Convertible Senior Notes [Member]
Total share-based compensation expense	11,804	11,120	7,795
Cost of Sales [Member]
Total share-based compensation expense	772,000	795,000	461,000
Research and Development Expense [Member]
Total share-based compensation expense	2,557,000	2,419,000	1,496,000
Selling and Marketing Expense [Member]
Total share-based compensation expense	1,070,000	925,000	481,000
General and Administrative Expense [Member]
Total share-based compensation expense	$ 7,405,000	$ 6,981,000	$ 5,357,000

Note Q - Stockholders' Equity (

Note Q - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	Jan. 10, 2020	Mar. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Oct. 17, 2016
Common Stock, Shares Authorized			45,000,000	45,000,000
Preferred Stock, Shares Authorized			5,000,000	5,000,000
Stock Issued During Period, Value, New Issues					$ 21,572
Proceeds from Issuance of Common Stock			$ 0	$ 0	$ 21,572
Subsequent Event [Member]
Stock Offering, Maximum Value, New Issues	$ 250,000
Stock Issued During Period, Shares, New Issues	0
Second ATM Offering [Member]
Common Stock, Maximum Amount to be Sold						$ 250,000
Stock Issued During Period, Value, New Issues		$ 1,600
Shares Issued, Price Per Share		$ 31.55
Proceeds from Issuance of Common Stock		$ 48,800
Second ATM Offering [Member] | Raymond James & Associates, Inc. [Member]
Common Stock, Maximum Amount to be Sold						$ 50,000

Note R - Segment and Geograph_3

Note R - Segment and Geographic Information (Details Textual) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Number of Reportable Segments									1
Revenue from Contract with Customer, Excluding Assessed Tax, Total	$ 48,658	$ 46,084	$ 43,411	$ 52,719	$ 58,018	$ 56,386	$ 87,822	$ 65,239	$ 190,872	$ 267,465	$ 382,329
Percentage of Revenue									100.00%	100.00%	100.00%
Data Center [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total									$ 143,563	$ 200,236	$ 306,712
Percentage of Revenue									75.20%	74.90%	80.20%
CATV [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total									$ 37,328	$ 51,699	$ 60,756
Percentage of Revenue									19.60%	19.30%	15.90%
Telecom [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total									$ 8,429	$ 13,159	$ 12,899
Percentage of Revenue									4.40%	4.90%	3.40%
FTTH [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total									$ 190	$ 818	$ 490
Percentage of Revenue									0.10%	0.30%	0.10%

Note R - Segment and Geograph_4

Note R - Segment and Geographic Information - Revenue Information by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue, net	$ 48,658	$ 46,084	$ 43,411	$ 52,719	$ 58,018	$ 56,386	$ 87,822	$ 65,239	$ 190,872	$ 267,465	$ 382,329
UNITED STATES
Revenue, net									9,795	10,795	18,209
TAIWAN, PROVINCE OF CHINA
Revenue, net									97,776	113,547	241,820
CHINA
Revenue, net									$ 83,301	$ 143,123	$ 122,300

Note R - Segment and Geograph_5

Note R - Segment and Geographic Information - Asset Information by Geographic Region (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Long-lived assets	$ 266,010	$ 244,002	$ 202,754
UNITED STATES
Long-lived assets	94,507	88,815	75,446
TAIWAN, PROVINCE OF CHINA
Long-lived assets	73,816	65,451	67,379
CHINA
Long-lived assets	$ 97,687	$ 89,736	$ 59,929

Note S - Employee Benefit Pla_2

Note S - Employee Benefit Plans (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 0.8	$ 0.8	$ 0.6
Global Technology, Inc. [Member]
Pension and Other Postretirement Benefits Cost (Reversal of Cost), Total	0.7	0.9	0.8
Prime World International Holdings, Ltd. (“Prime World”) [Member] | Foreign Plan [Member]
Pension and Other Postretirement Benefits Cost (Reversal of Cost), Total	$ 0.8	$ 0.9	$ 0.9

Note T - Commitments and Cont_3

Note T - Commitments and Contingencies (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Leases, Rent Expense, Net, Total	$ 1.3	$ 1.1	$ 1.1

Note T - Commitments and Cont_4

Note T - Commitments and Contingencies - Minimum Rental Commitments (Details) $ in Thousands	Dec. 31, 2019USD ($)
2020	$ 1,256
2021	1,181
2022	1,120
2023	1,156
2024	1,090
thereafter	5,040
	$ 10,843

Note U - Subsequent Events (Det

Note U - Subsequent Events (Details Textual) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Jan. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Repayments of Lines of Credit		$ 88,299	$ 165,569	$ 39,003
Branch Banking and Trust Company [Member] | Revolving Credit Facility [Member] | Fourth Amendment to Loan Agreement with BB and T [Member] | Subsequent Event [Member]
Repayments of Lines of Credit	$ 20,000

Note V - Selected Quarterly F_3

Note V - Selected Quarterly Financial Data (Unaudited) - Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue from Contract with Customer, Excluding Assessed Tax, Total	$ 48,658	$ 46,084	$ 43,411	$ 52,719	$ 58,018	$ 56,386	$ 87,822	$ 65,239	$ 190,872	$ 267,465	$ 382,329
Cost of goods sold	37,322	34,108	32,873	40,368	47,481	38,849	53,959	39,403	144,671	179,692	216,049
Gross profit	$ 11,336	$ 11,976	$ 10,538	$ 12,351	$ 10,537	$ 17,537	$ 33,863	$ 25,836	46,201	87,773	166,280
Gross margin	23.30%	26.00%	24.30%	23.40%	18.20%	31.10%	38.60%	39.60%
Research and development	$ 10,597	$ 10,466	$ 11,151	$ 11,185	$ 11,342	$ 14,180	$ 12,645	$ 11,736	43,399	49,903	35,365
Sales and marketing	2,615	2,518	2,331	2,595	1,920	2,370	2,377	2,474	10,060	9,141	8,702
General and administrative	10,178	9,988	10,884	10,440	9,552	10,591	9,898	9,456	41,489	39,497	35,262
Total operating expenses	23,390	22,972	24,366	24,220	22,814	27,141	24,920	23,666	94,948	98,541	79,329
Income (loss) from operations	(12,054)	(10,996)	(13,828)	(11,869)	(12,277)	(9,604)	8,943	2,170	(48,747)	(10,768)	86,951
Interest and other income (expense), net	(1,109)	276	(729)	(1,079)	71	578	1,387	(1,046)	(2,640)	990	(2,425)
Total income (loss) before income taxes	(13,163)	(10,720)	(14,557)	(12,948)	(12,206)	(9,026)	10,330	1,124	(51,387)	(9,778)	84,526
Income tax (expense) benefit	(22,267)	1,940	3,191	2,474	3,638	5,294	(2,296)	996	(14,662)	7,632	(10,575)
Net income (loss)	$ (35,430)	$ (8,780)	$ (11,366)	$ (10,474)	$ (8,568)	$ (3,732)	$ 8,034	$ 2,120	$ (66,049)	$ (2,146)	$ 73,951
Net income (loss) per share—basic (in dollars per share)	$ (1.76)	$ (0.44)	$ (0.57)	$ (0.53)	$ (0.43)	$ (0.19)	$ 0.41	$ 0.11	$ (3.31)	$ (0.11)	$ 3.87
Net income (loss) per share—diluted (in dollars per share)	$ (1.76)	$ (0.44)	$ (0.57)	$ (0.53)	$ (0.43)	$ (0.19)	$ 0.40	$ 0.11	$ (3.31)	$ (0.11)	$ 3.67