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

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-Publisher FASB
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-Topic 470
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-Section 50
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 210
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- Definition

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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-Section S99
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- Definition

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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Note 11 - Notes Payable and Long-term Debt - Schedule of Notes Payable and Long-term Debt (Details) (Parentheticals) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020	Apr. 05, 2021	Sep. 30, 2019	Mar. 05, 2019
Chailease Finance Co, Ltd. [Member] \| Promissory Note [Member]
Long-term debt, interest	3.50%	3.50%
Long-term debt, maturity date	Jan. 21, 2022	Jan. 21, 2022
Chailease Finance Co, Ltd. [Member] \| Promissory Note 2 [Member]
Long-term debt, interest	3.10%	3.10%
Long-term debt, maturity date	Jan. 21, 2022	Jan. 21, 2022
Paycheck Protection Program, CARES Act [Member]
Long-term debt, interest	1.00%	1.00%
Long-term debt, maturity date	Apr. 16, 2022	Apr. 16, 2022
Truist Bank [Member] \| Revolving Credit Facility [Member]
Long-term debt, maximum			$ 20,000,000	$ 20,000,000	$ 25,000,000
Truist Bank [Member] \| Revolving Credit Facility [Member] \| Third Amendment to Loan Agreement with BB and T [Member]
Long-term debt, maximum	$ 20,000,000	$ 20,000,000
Long-term debt, interest	2.25%	2.25%
Long-term debt, maturity date	Oct. 15, 2022	Oct. 15, 2022
Taishin International Bank [Member] \| Revolving Credit Facility [Member] \| Credit Facility [Member]
Long-term debt, maximum	$ 3,436,000	$ 3,436,000
Long-term debt, interest	2.20%	2.20%
Long-term debt, maturity date	Apr. 14, 2021	Apr. 14, 2021
China Merchants Bank Co, Ltd [Member] \| Revolving Credit Facility [Member]
Long-term debt, maximum	$ 8,917,000	$ 8,917,000
Long-term debt, interest	4.50%	4.50%
Long-term debt, maturity date	Oct. 14, 2020	Oct. 14, 2020
SPD Bank [Member] \| Revolving Credit Facility [Member]
Long-term debt, maximum	$ 25,449,000	$ 25,449,000
Long-term debt, maturity date	May 24, 2024	May 24, 2024
SPD Bank [Member] \| Revolving Credit Facility [Member] \| Minimum [Member]
Long-term debt, interest	3.01%	3.01%
SPD Bank [Member] \| Revolving Credit Facility [Member] \| Maximum [Member]
Long-term debt, interest	4.57%	4.57%
China Zheshang Bank Co., Ltd [Member] \| Revolving Credit Facility [Member] \| The ¥100M Credit Facility [Member]
Long-term debt, maximum	$ 14,125,000
Long-term debt, interest	3.50%
Long-term debt, maturity date	Jan. 05, 2024
China Zheshang Bank Co., Ltd [Member] \| Revolving Credit Facility [Member] \| The ¥50M Credit Facility [Member]
Long-term debt, maximum	$ 7,167,000
Long-term debt, interest	5.70%
Long-term debt, maturity date	Jun. 20, 2022