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Note 1 - Summary of Significant Accounting Policies - Basic Earnings Per Share (EPS) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Net income	$ 18,850,063	$ 17,194,169
Weighted average common shares outstanding (in shares)	9,148,244	9,236,989
Basic EPS (in dollars per share)	$ 2.06	$ 1.86

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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