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Note I - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		18 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021
Income Tax Expense (Benefit), Total	$ 255	$ (1,518)	$ 846	$ (12,811)
Effective Income Tax Rate Reconciliation, Percent, Total	2.40%	(19.60%)	8.80%	92.00%
Expected Proceeds from Income Tax Refunds, Carryback of Loss			$ 7,600
State and Local Jurisdiction [Member]
Open Tax Year			2014 2015 2016 2017 2018 2019 2020
Foreign Tax Authority [Member]
Open Tax Year			2016 2017 2018 2019 2020
Tax Year 2019 [Member]
Proceeds from Income Tax Refunds					$ 6,400
Tax Year 2018 [Member]
Proceeds from Income Tax Refunds					$ 3,200

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