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Note 8 - Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($)	3 Months Ended								12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2021	Mar. 31, 2020
Net earnings (loss)	$ 10,403,597	$ 2,129,745	$ (250,005)	$ (858,862)	$ (3,018,842)	$ (881,003)	$ (1,544,137)	$ 194,772	$ 11,424,475	$ (5,249,210)
Weighted average common shares (in shares)									7,027,707	7,000,403
Net earnings (loss)	$ 10,403,597	$ 2,129,745	$ (250,005)	$ (858,862)	$ (3,018,842)	$ (881,003)	$ (1,544,137)	$ 194,772	$ 11,424,475	$ (5,249,210)
Weighted average common shares and common share equivalents (in shares)									7,027,707	7,000,403

X

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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