Note 6 - Share Based Compensation - Share Based Compensation Expense Is Included in Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Share-based compensation expense:
Share-based compensation	$ 458	$ 497	$ 1,382	$ 1,525
Share-based compensation costs	458	497	1,382	1,525
Software Service, Support and Maintenance Arrangement [Member]
Share-based compensation expense:
Share-based compensation	7	15	26	70
Selling and Marketing Expense [Member]
Share-based compensation expense:
Share-based compensation	39	29	102	90
General and Administrative Expense [Member]
Share-based compensation expense:
Share-based compensation	$ 412	$ 453	$ 1,254	$ 1,365