Note 7 - Income (Loss) Per Common Share - Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share [Abstract]
Net (loss) income	$ (37,348)	$ 35,095	$ (9,457)
Preferred stock dividends	(552)	(552)	(552)
Net (loss) income applicable to common shares	$ (37,900)	$ 34,543	$ (10,009)
Weighted Average Number of Shares Outstanding, Basic	557,344	536,192	527,329
Weighted Average Number of Shares Outstanding, Diluted, Adjustment	0	5,984	0
Diluted weighted average common shares (in shares)	557,344	542,176	527,329
Earnings Per Share, Basic	$ 0.07	$ 0.06	$ (0.02)
Earnings Per Share, Diluted	$ 0.07	$ 0.06	$ (0.02)