Note 11 - Notes Payable and Long-term Debt - Schedule of Notes Payable and Long-term Debt (Details) (Parentheticals) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2022	Dec. 31, 2021	Sep. 28, 2017
Chailease Finance Co, Ltd. [Member] \| Promissory Note [Member]
Long-term debt, interest	3.10%	3.10%
Long-term debt, maturity date	Jan. 21, 2022	Jan. 21, 2022
Revolving Credit Facility [Member] \| Truist Bank [Member]
Long-term debt, maximum			$ 20,000
Revolving Credit Facility [Member] \| Truist Bank [Member] \| Secured Overnight Financing Rate (SOFR) [Member] \| Sixth Amendment to Loan Agreement with Truist Bank [Member]
Long-term debt, interest	2.56%	2.56%
Long-term debt, maturity date	Apr. 15, 2023	Apr. 15, 2023
Long-term debt, maximum	$ 20,000	$ 20,000
Revolving Credit Facility [Member] \| SPD Bank [Member]
Long-term debt, maturity date	May 24, 2024	May 24, 2024
Long-term debt, maximum	$ 25,449	$ 25,449
Revolving Credit Facility [Member] \| SPD Bank [Member] \| Minimum [Member]
Long-term debt, interest	2.80%	2.80%
Revolving Credit Facility [Member] \| SPD Bank [Member] \| Maximum [Member]
Long-term debt, interest	4.57%	4.57%
Revolving Credit Facility [Member] \| China Zheshang Bank Co., Ltd [Member] \| The ¥100M Credit Facility [Member]
Long-term debt, maturity date	Jun. 06, 2027	Jun. 06, 2027
Long-term debt, maximum	$ 29,800	$ 29,800
Revolving Credit Facility [Member] \| China Zheshang Bank Co., Ltd [Member] \| The ¥100M Credit Facility [Member] \| Minimum [Member]
Long-term debt, interest	2.60%	2.60%
Revolving Credit Facility [Member] \| China Zheshang Bank Co., Ltd [Member] \| The ¥100M Credit Facility [Member] \| Maximum [Member]
Long-term debt, interest	4.80%	4.80%
Revolving Credit Facility [Member] \| China Zheshang Bank Co., Ltd [Member] \| The ¥50M Credit Facility [Member]
Long-term debt, interest	5.70%	5.70%
Long-term debt, maturity date	Jun. 27, 2022	Jun. 27, 2022
Long-term debt, maximum	$ 7,167	$ 7,167

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

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