Note 7 - Loss Per Common Share - Summary of Reconciliation of Earnings (Loss) Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Net loss attributable to common shares — basic	$ (14,040)	$ (17,781)
Weighted average common shares outstanding — basic (in shares)	20,093	17,344
Basic loss per common share (in dollars per share)	$ (0.70)	$ (1.03)
Net loss attributable to common shares — diluted	$ (14,040)	$ (17,781)
Weighted average common shares outstanding — diluted (in shares)	20,093	17,344
Diluted loss per common share (in dollars per share)	$ (0.70)	$ (1.03)