Note 9 - NET LOSS PER SHARE - Calculation of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
NET LOSS PER SHARE
Net loss	$ (1,147)	$ (4,484)	$ (5,297)	$ (12,081)
Basic weighted-average shares outstanding (in shares)	37,028	37,004	37,316	36,989
Diluted weighted-average shares outstanding (in shares)	37,028	37,004	37,316	36,989
Basic (in dollars per share)	$ (0.03)	$ (0.12)	$ (0.14)	$ (0.33)
Diluted (in dollars per share)	$ (0.03)	$ (0.12)	$ (0.14)	$ (0.33)