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Earnings Per Share (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Computation for earnings per share
Net Income	$ 46,314,388	$ 51,601,669	$ 46,594,132
Less: Net loss (income) attributable to redeemable noncontrolling interest	1,061,441	(1,612,712)	(542,209)
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	$ 47,375,829	$ 49,988,957	$ 46,051,923
Weighted average number of outstanding shares
Weighted average number of outstanding shares (in shares)	3,512,470	3,448,824	3,407,408
Dilutive impact of restricted stock units (in shares)	2,058	3,014	5,983
Weighted average number of outstanding shares - Diluted (in shares)	3,514,528	3,451,838	3,413,391
Earnings per share attributable to common shareholders
Basic (in dollars per share)	$ 13.49	$ 14.49	$ 13.52
Diluted (in dollars per share)	$ 13.48	$ 14.48	$ 13.49

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