Note 6 - Earnings Per Share - Summary of Reconciliation of Earnings (Loss) Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Net loss — basic	$ (39,010)	$ (45,959)
Weighted average shares outstanding — basic (in shares)	21,261	20,322
Basic loss per share (in dollars per share)	$ (1.83)	$ (2.26)
Weighted average shares outstanding — diluted (in shares)	21,261	20,322
Diluted loss per share (in dollars per share)	$ (1.83)	$ (2.26)