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Condensed Consolidated Statement of Equity (Unaudited) - 6 months ended Jun. 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, shares at Dec. 31, 2015 16,379,501 16,379,501    
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Share-based compensation $ 408,226 $ 408,226    
Share-based compensation, shares   223,587    
Exercise of options and related tax benefit (835,016) $ (835,016)    
Exercise of options and related tax benefit, shares   0    
Repurchase of shares (1,689,040) $ (1,689,040)    
Repurchase of shares, shares   (366,740)    
Net income (loss) (329,495)   (301,155) (28,340)
Balance, End of Period at Jun. 30, 2016 $ 74,374,458 $ 55,222,464 $ 19,248,459 $ (96,465)
Balance, End of Period, shares at Jun. 30, 2016 16,236,348 16,236,348