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Condensed Consolidated Statement of Equity (Unaudited) - 9 months ended Sep. 30, 2016 - USD ($)
Total
Common stock
Retained earnings
Noncontrolling interests
Balance, Beginning of Period at Dec. 31, 2015 $ 76,819,783 $ 57,338,294 $ 19,549,614 $ (68,125)
Balance, Beginning of Period (in shares) at Dec. 31, 2015 16,379,501 16,379,501    
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Share-based compensation $ 623,504 $ 623,504    
Share-based compensation (in shares)   223,587    
Exercise of options and related tax benefit (907,270) $ (907,270)    
Exercise of options and related tax benefit (in shares)   0    
Repurchase of shares (1,879,395) $ (1,879,395)    
Repurchase of shares (in shares)   (407,457)    
Net income (loss) (234,007)   (194,989) (39,018)
Balance, End of Period at Sep. 30, 2016 $ 74,422,615 $ 55,175,133 $ 19,354,625 $ (107,143)
Balance, End of Period (in shares) at Sep. 30, 2016 16,195,631 16,195,631