Note 7 - Investments in Foreign Joint Ventures - Summary of Equity Method Investment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Total current assets	$ 14,972	$ 32,217
Total assets	81,299	96,580
Total liabilities	19,487	36,713
Total joint ventures’ equity	61,812	59,867	$ 61,059
Total liabilities and equity	81,299	96,580
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Revenues	102,981	89,634
Gross profit	12,544	14,306
Earnings	4,418	4,380
Total current assets	135,217	88,536
Total non-current assets	3,003	3,016
Total assets	138,220	91,552
Total liabilities	104,760	58,482
Total joint ventures’ equity	33,460	33,070
Total liabilities and equity	$ 138,220	$ 91,552