Note 9 - Per Share Data - Reconciliation of the Basic and Diluted Loss Per Share (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Net income (loss)	$ 33,040,588	$ (3,113,358)	$ 34,716,600	$ (3,756,262)
Less: Change in fair value of warrants	0	0	400,663	294,548
Net income/(loss), adjusted for change in fair value of warrants for diluted earnings per share	$ 33,040,588	$ (3,113,358)	$ 34,315,937	$ (4,050,810)
Weighted average shares outstanding: basic (in shares)	73,024,147	74,840,846	72,924,178	75,822,713
Effect of potential common shares (in shares)	235,125	0	692,659	812,250
Weighted average shares outstanding: diluted (in shares)	73,259,272	74,840,846	73,616,837	76,634,963
Basic income/(loss) per share (in dollars per share)	$ 0.45	$ (0.04)	$ 0.48	$ (0.05)
Diluted income/(loss) per share (in dollars per share)	$ 0.45	$ (0.04)	$ 0.47	$ (0.05)