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Note 10 - Per Share Data - Reconciliation of the Basic and Diluted Loss Per Share (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net (loss)/income	$ (3,113,358)	$ 24,187,957	$ (3,756,262)	$ 36,180,584
Less: Change in fair value of warrants	0	0	294,548	0
Net (loss)/income, adjusted for change in fair value of warrants for diluted earnings per share	$ (3,113,358)	$ 24,187,957	$ (4,050,810)	$ 36,180,584
Weighted average shares outstanding: basic (in shares)	74,840,846	78,080,461	75,822,713	79,880,493
Effect of potential common shares (in shares)	0	87,609	812,250	171,285
Weighted-average shares: diluted (in shares)	74,840,846	78,168,070	76,634,963	80,051,778
Basic (loss)/income per share (in dollars per share)	$ (0.04)	$ 0.31	$ (0.05)	$ 0.45
Diluted (loss)/income per share (in dollars per share)	$ (0.04)	$ 0.31	$ (0.05)	$ 0.45

X

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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