Note 15 - Stockholders Equity - Stock-based Compensation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Total stock-based compensation	$ 2,068	$ 2,138
Cost of Sales [Member]
Total stock-based compensation	31	25
Selling and Marketing Expense [Member]
Total stock-based compensation	848	872
General and Administrative Expense [Member]
Total stock-based compensation	1,084	1,151
Research and Development Expense [Member]
Total stock-based compensation	$ 105	$ 90