Note 9 - Earnings (Loss) Per Share Applicable to Common Stockholders - Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Net income (loss) - basic	$ 706	$ (20,137)
Reversal of gain due to change in fair value of warrant liability	(340)	0
Net income (loss) - diluted	$ 366	$ (20,137)
Weighted average shares outstanding - basic (in shares)	211,007,522	195,141,950	195,141,950
Diluted preferred shares (in shares)	31,847,239	0
Weighted average shares outstanding - diluted (in shares)	242,854,761	195,141,950	195,141,950
Basic earnings (loss) per share (in dollars per share)	$ 0.00	$ (0.10)	$ (0.10)
Diluted earnings (loss) per share (in dollars per share)	$ 0.00	$ (0.10)	$ (0.10)