Note 5 - (Loss) Income Per Common Share - Net Income Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net (loss) income	$ (13,523)	$ 2,748	$ (9,370)	$ 24,199
Preferred stock dividends	(138)	(138)	(276)	(276)
Net (loss) income applicable to common shares	$ 13,661	$ (2,610)	$ 9,646	$ (23,923)
Basic weighted average common shares (in shares)	(539,401)	(535,531)	(538,943)	(534,819)
Dilutive restricted stock units, warrants and deferred shares (in shares)	0	6,731	0	6,649
Diluted weighted average common shares (in shares)	539,401	542,262	538,943	541,468
Basic (loss) income per common share (in dollars per share)	$ (0.03)	$ 0.01	$ (0.02)	$ 0.04
Diluted (loss) income per common share (in dollars per share)	$ (0.03)	$ 0.01	$ (0.02)	$ 0.04