Note 5 - (Loss) Income Per Common Share - Net Income Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Notes To Financial Statements [Abstract]
Net (loss) income	$ (3,173)	$ 4,153
Preferred stock dividends	(138)	(138)
Net (loss) income applicable to common shares	$ (3,311)	$ 4,015
Basic weighted average common shares (in shares)	600,075,000	538,490,000
Dilutive restricted stock units, warrants and deferred shares		5,571,000
Diluted weighted average common shares (in shares)	600,075,000	544,061,000
Basic (loss) income per common share (in dollars per share)	$ (0.01)	$ 0.01
Diluted (loss) income per common share (in dollars per share)	$ (0.01)	$ 0.01