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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Earnings per share (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings per share
Additional stock options included in calculation of diluted EPS	226,150		226,150
Net Income	$ 8,625,751	$ 1,024,434	$ 12,714,637	$ 1,286,965
Preferred dividend requirements	(145,535)	(175,456)	(493,826)	(527,162)
Deemed contribution on extinguishment of preferred stock	2,525,848	0	2,519,124	0
Income applicable to common shareholders	$ 11,006,064	$ 848,978	$ 14,739,935	$ 759,803
Average common shares outstanding	33,371,471	32,674,954	32,947,241	32,671,648
Average common and common equivalent shares outstanding - assuming dilution	33,984,934	32,674,954	33,071,652	32,671,648
Basic earnings per share	$ 0.33	$ 0.03	$ 0.45	$ 0.02
Diluted earnings per share	$ 0.33	$ 0.03	$ 0.45	$ 0.02

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