Note 7 - Income Taxes (Details Textual) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2018	Dec. 31, 2017
Effective Income Tax Rate Reconciliation, Percent, Total		15.40%	(22.30%)
Income Tax Expense (Benefit), Total		$ 823	$ 902
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount		8	1,486
Goodwill, Impairment Loss	$ 800	0	800
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Amount		(0)	120
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent				21.00%	35.00%
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards, Total		1,100	$ 4,300
Foreign Tax Authority [Member]
Tax Credit Carryforward, Amount		500
Paycheck Protection Program CARES Act [Member]
Debt Instrument, Decrease, Forgiveness		$ 2,000