Note 7 - Earnings Per 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, 2024	Mar. 31, 2023
Net loss — basic	$ (10,338)	$ (14,040)
Weighted average shares outstanding — basic (in shares)	20,730	20,093
Basic loss per share (in dollars per share)	$ (0.5)	$ (0.7)
Weighted average shares outstanding — diluted (in shares)	20,730	20,093
Diluted loss per share (in dollars per share)	$ (0.5)	$ (0.7)