Note 5 - Income Per Common Share - Net Income Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Net income	$ 4,153	$ 21,451
Preferred stock dividends	(138)	(138)
Income applicable to common stockholders	$ 4,015	$ 21,313
Basic weighted average common shares (in shares)	538,490	534,101
Dilutive incentive compensation units, warrants and deferred shares (in shares)	5,571	6,426
Diluted weighted average common shares (in shares)	544,061	540,527
Basic income per common share (in dollars per share)	$ 0.01	$ 0.04
Diluted income per common share (in dollars per share)	$ 0.01	$ 0.04