Note 15 - Stock-based Compensation Plan - Allocation of Share-based Compensation Expense (Details) - Restricted Stock [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Allocation of Share-based Compensation Expense	$ 1,787	$ 1,450
Cost of Sales [Member]
Allocation of Share-based Compensation Expense	62	26
Selling and Marketing Expense [Member]
Allocation of Share-based Compensation Expense	32	22
Research and Development Expense [Member]
Allocation of Share-based Compensation Expense	51	62
General and Administrative Expense [Member]
Allocation of Share-based Compensation Expense	$ 1,642	$ 1,340