Note 6 - Share Based Compensation - Share Based Compensation Expense Is Included in Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Share-based compensation	$ 516	$ 499
Share-based compensation costs	515	499
Software Service, Support and Maintenance Arrangement [Member]
Share-based compensation	5	11
Selling and Marketing Expense [Member]
Share-based compensation	50	30
General and Administrative Expense [Member]
Share-based compensation	$ 460	$ 458