Note 14 - Stockholders Equity - Stock-based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Total stock-based compensation	$ 443	$ 508
Cost of Sales [Member]
Total stock-based compensation	8	7
Selling and Marketing Expense [Member]
Total stock-based compensation	175	217
General and Administrative Expense [Member]
Total stock-based compensation	229	264
Research and Development Expense [Member]
Total stock-based compensation	$ 31	$ 20