Note 10 - Net Loss Per Share - Schedule 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 attributable to common shareholders	$ (6,672)	$ (7,039)	$ (11,457)	$ (10,577)
Weighted average common shares outstanding used to compute net loss per share, basic and diluted (in shares)	126,624	121,572	126,624	107,160
Net loss per share of common stock, basic and diluted (in dollars per share)	$ (0.05)	$ (0.06)	$ (0.09)	$ (0.10)