Note 15 - Income Taxes (Details Textual) - USD ($) $ in Thousands		12 Months Ended
	Dec. 22, 2017	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Expense (Benefit), Total		$ 12,078	$ 17,538	$ 15,067
Effective Income Tax Rate Reconciliation, Percent, Total		19.20%	21.60%	16.40%
Effective Income Tax Rate Continuing Operations Increase (Decrease) During the Period		2.40%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%	21.00%	21.00%	21.00%
Increase (Decrease) in Income Taxes Payable, CARES Act		$ (2,900)
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries		0
Undistributed Earnings of Foreign Subsidiaries		15,800
Operating Loss Carryforwards, Total		$ 6,600
Operating Loss Carryforwards, Expiration Period (Year)		10 years
Operating Loss Carryforwards, Percentage of Taxable Income		60.00%
Deferred Tax Assets, Valuation Allowance, Total		$ 9,138	$ 8,248
Unrecognized Tax Benefits, Ending Balance		4,830	$ 4,598	$ 4,096
Deferred Tax Liability, CARES Act		$ 2,900