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Note 11 - Notes Payable and Long-term Debt (Details Textual) $ in Thousands								3 Months Ended
	Jan. 21, 2022 USD ($)	Jan. 21, 2022 TWD ($)	Dec. 29, 2021 USD ($)	Sep. 15, 2020 USD ($)	Sep. 15, 2020 TWD ($)	Jun. 21, 2019 USD ($)	May 24, 2019 USD ($)	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)	Apr. 05, 2021 USD ($)	Jun. 21, 2019 CNY (¥)	May 24, 2019 CNY (¥)	May 08, 2019 USD ($)	May 07, 2019 CNY (¥)	Apr. 30, 2019 CNY (¥)
Payments to Acquire Property, Plant, and Equipment, Total								$ 1,022	$ 2,212
Finance Lease, Principal Payments								5	$ 4
Debt Instrument, Unused Borrowing Capacity, Amount								4,300		$ 7,400
Cash Collateral for Borrowed Securities								7,000		5,400
Chailease Finance Co, Ltd. [Member] | Prime World International Holdings, Ltd. (“Prime World”) [Member]
Payments to Acquire Property, Plant, and Equipment, Total	$ 800	$ 22,311,381
Chailease Finance Co, Ltd. [Member] | Prime World International Holdings, Ltd. (“Prime World”) [Member] | Promissory Note [Member]
Finance Lease, Principal Payments				$ 5,500
Chailease Finance Co, Ltd. [Member] | Prime World International Holdings, Ltd. (“Prime World”) [Member] | Second Sales Contract [Member]
Finance Lease, Principal Payments					$ 159,027,448
Revolving Credit Facility [Member] | Truist Bank [Member]
Line of Credit Facility, Maximum Borrowing Capacity											$ 20,000
Long-term Line of Credit, Total			$ 19,600
Revolving Credit Facility [Member] | Truist Bank [Member] | Secured Overnight Financing Rate (SOFR) [Member]
Debt Instrument, Basis Spread on Variable Rate			1.56%
Debt Instrument, SOFR Floor			0.75%
Revolving Credit Facility [Member] | SPD Bank [Member]
Line of Credit Facility, Maximum Borrowing Capacity								25,449		25,449
Revolving Credit Facility [Member] | SPD Bank [Member] | Global Technology, Inc. [Member] | The SPD Credit Line [Member]
Line of Credit Facility, Maximum Borrowing Capacity							$ 25,400						¥ 180,000,000
Long-term Line of Credit, Total								19,100
Debt Instrument, Term (Year)							5 years
Bank Acceptances Executed								2,200
Revolving Credit Facility [Member] | SPD Bank [Member] | Global Technology, Inc. [Member] | The SPD 30M Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity | ¥															¥ 30,000,000
Revolving Credit Facility [Member] | SPD Bank [Member] | Global Technology, Inc. [Member] | The SPD 9.9M Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity | ¥																¥ 9,900,000
Revolving Credit Facility [Member] | SPD Bank [Member] | Global Technology, Inc. [Member] | The SPD 2.0M Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity														$ 2,000
Revolving Credit Facility [Member] | China Zheshang Bank Co., Ltd [Member] | The ¥100M Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity								14,125		14,125
Revolving Credit Facility [Member] | China Zheshang Bank Co., Ltd [Member] | The ¥50M Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity								7,167		$ 7,167
Revolving Credit Facility [Member] | China Zheshang Bank Co., Ltd [Member] | Global Technology, Inc. [Member] | The ¥100M Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity						$ 14,100						¥ 100,000,000
Long-term Line of Credit, Total								11,000
Debt Instrument, Term (Year)						18 months
Bank Acceptances Executed								7,700
Revolving Credit Facility [Member] | China Zheshang Bank Co., Ltd [Member] | Global Technology, Inc. [Member] | The ¥50M Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity						$ 7,100						¥ 50,000,000
Long-term Line of Credit, Total								$ 7,600
Debt Instrument, Term (Year)						3 years

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Minimum SOFR interest rate for debt instrument.

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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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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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Amount of cash outflow for principal payment on finance lease.

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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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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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