Note 12 - Employee Retention Credit (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Employee Retention Credit Benefits, CARES Act	$ 5,209	$ 5,209
Cost of Sales [Member]
Employee Retention Credit Benefits, CARES Act	4,670	4,670
Selling Expense [Member]
Employee Retention Credit Benefits, CARES Act	125	125
General and Administrative Expense [Member]
Employee Retention Credit Benefits, CARES Act	$ 414	$ 414