Note I - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2020
Income Tax Expense (Benefit), Total	$ 454	$ 591
Effective Income Tax Rate Reconciliation, Percent, Total	12.00%	50.60%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
State and Local Jurisdiction [Member]
Open Tax Year	2016 2017 2018 2019 2020 2021
Foreign Tax Authority [Member]
Open Tax Year	2016 2017 2018 2019 2020 2021
Tax Year 2019 [Member]
Proceeds from Income Tax Refunds	$ 200		$ 6,400
Tax Year 2018 [Member]
Proceeds from Income Tax Refunds	$ 7,600		$ 3,200