Note 11 - Net (Loss) Income Per Common Share - Calculation of Diluted Shares (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Net loss	$ (7,066)	$ (1,118)
Basic net loss attributable to common stockholders	$ (7,066)	$ (1,118)
Basic and diluted weighted averge shares outstanding (in shares)	42,014,055	33,236,818
Basic and diluted earnings per share attributable to common stockholders (in dollars per share)	$ (0.17)	$ (0.03)