The term of the draw under debt instrument.

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The amount of commitment fees, represented as a percentage of total borrowing capacity, for the unused borrowing capacity under the long-term financing arrangement that is available to the entity.

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Represents the minimum threshold amount for the fixed charge ratio before financial covenants may apply to the associated debt instrument.

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The LIBOR rate.

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Represents the percentage of maximum borrowing capacity under the credit facility under which the entity is not required to comply with financial covenants associated with the credit facility.

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The initial payment made for the sale leaseback transaction.

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The term of the sale leaseback transaction.

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The amount of the financial institution's obligation to pay the holder of the customer's draft which the financial institution has guaranteed (i.e., Banker's Acceptance).

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Carrying amount as of the balance sheet date of cash collateral held for borrowed securities, for which the cash is restricted as to withdrawal or usage.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Face (par) amount of debt instrument at time of issuance.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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The financing cost related to leases that have been recorded under the deposit method, as a financing or as a capital leases in connection with the transaction involving the sale of property to another party and the lease of the property back to the seller.

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No definition available.

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The amount of the monthly rental payments due under the lease entered into in connection with the transactions involving the sale of property to another party and the lease of the property back to the seller.

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Amount of cash inflow after closing and debt issuance costs received by a seller-lessee in a sale-leaseback recognized in investing activities.

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Note K - Notes Payable and Long-term Debt (Details Textual)																								12 Months Ended
	Jan. 21, 2022 USD ($)	Jan. 21, 2022 TWD ($)	Oct. 07, 2020 USD ($)	Sep. 15, 2020 USD ($)	Sep. 15, 2020 TWD ($)	Apr. 17, 2020 USD ($)	Sep. 30, 2019 USD ($)	Jul. 23, 2019 USD ($)	Jun. 21, 2019 USD ($)	May 24, 2019 USD ($)	May 08, 2019 USD ($)	May 07, 2019 USD ($)	Apr. 30, 2019 USD ($)	Apr. 19, 2019 USD ($)	Apr. 11, 2019 USD ($)	Mar. 05, 2019 USD ($)	Jan. 21, 2019 USD ($)	Jan. 21, 2019 TWD ($)	Dec. 11, 2018	Nov. 29, 2018 USD ($)	Nov. 29, 2018 TWD ($)	Mar. 30, 2018 USD ($)	Sep. 28, 2017 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Oct. 19, 2020 USD ($)	Oct. 19, 2020 CNY (¥)	Oct. 07, 2020 TWD ($)	Jul. 23, 2019 TWD ($)	Jun. 21, 2019 CNY (¥)	May 24, 2019 CNY (¥)	May 07, 2019 CNY (¥)	Apr. 30, 2019 CNY (¥)	Apr. 19, 2019 CNY (¥)	Apr. 11, 2019 TWD ($)	Jan. 21, 2019 TWD ($)	Nov. 29, 2018 TWD ($)
Long-term Debt, Gross																								$ 52,187,000	$ 49,985,000
Payments to Acquire Property, Plant, and Equipment, Total																								15,795,000	28,789,000	$ 71,854,000
Finance Lease, Principal Payments																								17,000	2,000
Debt Instrument, Unused Borrowing Capacity, Amount																								$ 28,700,000	$ 48,800,000
LIBOR Rate																								0.14%	1.76%
Cash Collateral for Borrowed Securities																								$ 5,400,000	$ 6,100,000
Chailease Finance Co, Ltd. [Member] \| Promissory Note [Member]
Long-term Debt, Gross																								$ 1,941,000	$ 4,262,000
Debt Instrument, Interest Rate, Stated Percentage																								3.50%	3.50%
Chailease Finance Co, Ltd. [Member] \| Prime World International Holdings, Ltd. (“Prime World”) [Member] \| Forecast [Member]
Payments to Acquire Property, Plant, and Equipment, Total	$ 800,000	$ 22,311,381
Chailease Finance Co, Ltd. [Member] \| Prime World International Holdings, Ltd. (“Prime World”) [Member] \| Promissory Note [Member]
Debt Instrument, Face Amount																				$ 6,800,000																		$ 210,601,605
Long-term Debt, Gross																								$ 1,900,000
Chailease Finance Co, Ltd. [Member] \| Finance Lease Agreement 2 [Member] \| Prime World International Holdings, Ltd. (“Prime World”) [Member]
Sale Leaseback Transaction, Net Proceeds, Investing Activities, Total																				$ 8,700,000	$ 267,340,468
Sale Leaseback Transaction, Term (Year)																				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%
Chailease Finance Co, Ltd. [Member] \| Second Sales Contract [Member] \| Prime World International Holdings, Ltd. (“Prime World”) [Member]
Sale Leaseback Transaction, Net Proceeds, Investing Activities, Total																	$ 8,700,000	$ 267,333,186
Sale Leaseback Transaction, Term (Year)																	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%
Finance Lease, Principal Payments				$ 5,500,000	$ 159,027,448
Chailease Finance Co, Ltd. [Member] \| Second Sales Contract [Member] \| Prime World International Holdings, Ltd. (“Prime World”) [Member] \| Promissory Note [Member]
Debt Instrument, Face Amount																	$ 6,800,000																				$ 209,555,736
Long-term Debt, Gross																								2,100,000
Minimum [Member] \| Chailease Finance Co, Ltd. [Member] \| Finance Lease Agreement 2 [Member] \| Prime World International Holdings, Ltd. (“Prime World”) [Member]
Sale Leaseback Transaction, Monthly Rental Payments																				$ 200,000	$ 5,571,229
Minimum [Member] \| Chailease Finance Co, Ltd. [Member] \| Second Sales Contract [Member] \| Prime World International Holdings, Ltd. (“Prime World”) [Member]
Sale Leaseback Transaction, Monthly Rental Payments																	200,000	$ 5,570,167
Maximum [Member] \| Chailease Finance Co, Ltd. [Member] \| Finance Lease Agreement 2 [Member] \| Prime World International Holdings, Ltd. (“Prime World”) [Member]
Sale Leaseback Transaction, Monthly Rental Payments																				$ 200,000	$ 6,139,188
Maximum [Member] \| Chailease Finance Co, Ltd. [Member] \| Second Sales Contract [Member] \| Prime World International Holdings, Ltd. (“Prime World”) [Member]
Sale Leaseback Transaction, Monthly Rental Payments																	$ 200,000	$ 6,082,131
Paycheck Protection Program, CARES Act [Member]
Proceeds from Issuance of Long-term Debt, Total						$ 6,230,000
Long-term Debt, Gross																								$ 6,229,000	$ 0
Debt Instrument, Interest Rate, Stated Percentage																								1.00%	1.00%
Branch Banking and Trust Company [Member] \| CapEx Loan [Member]
Debt Instrument, Term (Year)																						5 years
Debt Instrument, Face Amount																						$ 26,000,000
Branch Banking and Trust Company [Member] \| Term Loan [Member]
Debt Instrument, Term (Year)																						70 months
Debt Instrument, Face Amount																						$ 21,500,000
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] \| 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] \| 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%																					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%																					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] \| The NT$100M Credit Line [Member] \| Prime World International Holdings, Ltd. (“Prime World”) [Member]
Line of Credit Facility, Maximum Borrowing Capacity																													$ 100,000,000
Revolving Credit Facility [Member] \| Branch Banking and Trust Company [Member]
Debt Instrument, Term (Year)																						3 years	3 years
Line of Credit Facility, Maximum Borrowing Capacity							$ 20,000,000									$ 25,000,000						$ 60,000,000	$ 50,000,000
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																								$ 18,700,000
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] \| CTBC Bank Co., Ltd. [Member] \| Credit Facility with CTBC Bank Co., Ltd [Member] \| Prime World International Holdings, Ltd. (“Prime World”) [Member]
Debt Instrument, Term (Year)																			1 year
Revolving Credit Facility [Member] \| Far Eastern [Member]
Line of Credit Facility, Maximum Borrowing Capacity																								2,668	$ 2,668
Long-term Debt, Gross																								$ 0	$ 2,668,000
Debt Instrument, Interest Rate, Stated Percentage																								1.70%	1.70%
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 of Draw (Day)															180 days
Revolving Credit Facility [Member] \| Far Eastern [Member] \| Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity																								$ 3,436,000	$ 3,436,000
Long-term Debt, Gross																								$ 1,756,000	$ 0
Debt Instrument, Interest Rate, Stated Percentage																								2.20%	2.20%
Revolving Credit Facility [Member] \| Taishin International Bank [Member] \| The NT$100M Credit Line [Member] \| Prime World International Holdings, Ltd. (“Prime World”) [Member]
Debt Instrument, Term (Year)								1 year
Line of Credit Facility, Maximum Borrowing Capacity								$ 3,300,000																						$ 100,000,000
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	$ 3,336,000
Long-term Debt, Gross																								$ 0	$ 3,336,000
Debt Instrument, Interest Rate, Stated Percentage																								2.20%	2.20%
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 (Day)								90 days
Debt Instrument, Interest Rate, Stated Percentage																								2.25%
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 (Day)								120 days
Debt Instrument, Interest Rate, Stated Percentage																								2.20%
Revolving Credit Facility [Member] \| Taishin International Bank in Taiwan [Member] \| The NT$100M Credit Line [Member] \| Prime World International Holdings, Ltd. (“Prime World”) [Member]
Line of Credit Facility, Maximum Borrowing Capacity			$ 3,440,000
Long-term Line of Credit, Total																								$ 1,800,000
Debt Instrument, Interest Rate, Stated Percentage			2.15%																										2.15%
Revolving Credit Facility [Member] \| Taishin International Bank in Taiwan [Member] \| The NT$100M Credit Line [Member] \| Minimum [Member] \| Prime World International Holdings, Ltd. (“Prime World”) [Member]
Debt Instrument, Term of Draw (Day)			90 days
Revolving Credit Facility [Member] \| Taishin International Bank in Taiwan [Member] \| The NT$100M Credit Line [Member] \| Maximum [Member] \| Prime World International Holdings, Ltd. (“Prime World”) [Member]
Debt Instrument, Term of Draw (Day)			120 days
Revolving Credit Facility [Member] \| Taishin International Bank in Taiwan [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] \| China Construction Bank Co., Ltd. [Member] \| China Merchants Credit Line [Member] \| Global Technology, Inc. [Member]
Debt Instrument, Term (Year)														12 months
Line of Credit Facility, Maximum Borrowing Capacity																											$ 8,910,000	¥ 60,000,000							¥ 60,000,000
Long-term Line of Credit, Total																								2,300,000
Bank Acceptances Executed																								0
Revolving Credit Facility [Member] \| China Merchants Bank Co, Ltd [Member]
Line of Credit Facility, Maximum Borrowing Capacity																								8,917,000	$ 8,917,000
Long-term Debt, Gross																								$ 2,299,000	$ 0
Debt Instrument, Interest Rate, Stated Percentage																								4.50%	4.50%
Revolving Credit Facility [Member] \| China Merchants Bank Co, Ltd [Member] \| China Merchants Credit Line [Member] \| Global Technology, Inc. [Member]
Line of Credit Facility, Maximum Borrowing Capacity														$ 8,900,000
Revolving Credit Facility [Member] \| SPD Bank [Member]
Line of Credit Facility, Maximum Borrowing Capacity																								$ 25,449,000	$ 25,449,000
Long-term Debt, Gross																								$ 11,603,000	$ 7,919,000
Revolving Credit Facility [Member] \| SPD Bank [Member] \| Minimum [Member]
Debt Instrument, Interest Rate, Stated Percentage																								3.01%	3.01%
Revolving Credit Facility [Member] \| SPD Bank [Member] \| Maximum [Member]
Debt Instrument, Interest Rate, Stated Percentage																								4.57%	4.57%
Revolving Credit Facility [Member] \| SPD Bank [Member] \| The SPD 9.9M Credit Facility [Member] \| Global Technology, Inc. [Member]
Debt Instrument, Term (Year)													1 year
Line of Credit Facility, Maximum Borrowing Capacity													$ 1,500,000																					¥ 9,900,000
Revolving Credit Facility [Member] \| SPD Bank [Member] \| The SPD 30M Credit Facility [Member] \| Global Technology, Inc. [Member]
Debt Instrument, Term (Year)												1 year
Line of Credit Facility, Maximum Borrowing Capacity												$ 4,500,000																					¥ 30,000,000
Revolving Credit Facility [Member] \| SPD Bank [Member] \| The $2M Credit Facility [Member] \| Global Technology, Inc. [Member]
Debt Instrument, Term (Year)											6 months
Line of Credit Facility, Maximum Borrowing Capacity											$ 2,000,000
Revolving Credit Facility [Member] \| SPD Bank [Member] \| The SPD Credit Line [Member] \| Global Technology, Inc. [Member]
Debt Instrument, Term (Year)										5 years
Line of Credit Facility, Maximum Borrowing Capacity										$ 25,400,000																						¥ 180,000,000
Long-term Line of Credit, Total										11,600,000
Bank Acceptances Executed										$ 15,900,000
Revolving Credit Facility [Member] \| China Zheshang Bank Co., Ltd [Member] \| The ¥100M Credit Facility [Member] \| Global Technology, Inc. [Member]
Debt Instrument, Term (Year)									18 months
Line of Credit Facility, Maximum Borrowing Capacity									$ 14,100,000																						¥ 100,000,000
Bank Acceptances Executed																								$ 0
Revolving Credit Facility [Member] \| China Zheshang Bank Co., Ltd [Member] \| The ¥50M Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity																								7,167,000	$ 7,167,000
Long-term Debt, Gross																								$ 7,510,000	$ 7,167,000
Debt Instrument, Interest Rate, Stated Percentage																								5.70%	5.70%
Revolving Credit Facility [Member] \| China Zheshang Bank Co., Ltd [Member] \| The ¥50M Credit Facility [Member] \| Global Technology, Inc. [Member]
Debt Instrument, Term (Year)									3 years
Line of Credit Facility, Maximum Borrowing Capacity									$ 7,100,000																						¥ 50,000,000
Long-term Line of Credit, Total																								$ 7,500,000
Bank Acceptances Executed																								$ 0