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Consolidated Statements of Equity - USD ($)
Total
Cumulative Effect, Period of Adoption, Adjustment
Common stock
Retained earnings
Retained earnings
Cumulative Effect, Period of Adoption, Adjustment
Noncontrolling interest
Equity, balance at Dec. 31, 2016 $ 73,120,819 $ 1,082,924 $ 54,643,268 $ 18,604,931 $ 1,082,924 $ (127,380)
Equity, common shares outstanding at Dec. 31, 2016     16,074,176      
Increase (Decrease) in Shareholders' Equity [Roll Forward]            
Net income (loss) attributable to common shareholders (7,978,633)     (7,978,633)    
Net loss at subsidiary attributable to noncontrolling interests (71,182)         (71,182)
Net income (loss) (8,049,815)          
Repurchase of subsidiary shares to noncontrolling interest 0          
Share-based compensation, amount 1,115,063   $ 1,115,063      
Share-based compensation, shares     146,275      
Exercise of options and related tax benefit 372,500   $ 372,500      
Exercise of options and related tax benefit, shares     50,000      
Repurchase of common shares (3,719,890)   $ (3,719,890)      
Repurchase of common shares, shares     (547,376)      
Equity, balance at Dec. 31, 2017 63,921,601   $ 52,410,941 11,709,222   (198,562)
Equity, common shares outstanding at Dec. 31, 2017     15,723,075      
Increase (Decrease) in Shareholders' Equity [Roll Forward]            
Net income (loss) attributable to common shareholders (6,963,068)     (6,963,068)    
Net loss at subsidiary attributable to noncontrolling interests (75,704)         (75,704)
Net income (loss) (7,038,772)          
Repurchase of subsidiary shares to noncontrolling interest 0          
Share-based compensation, amount 1,364,698   $ 1,364,698      
Share-based compensation, shares     170,759      
Proceeds from sale of common stock, net of offering costs 200,909   $ 200,909      
Proceeds from the sale of common stock, net of offering costs, shares     30,704      
Repurchase of common shares (2,877,935)   $ (2,877,935)      
Repurchase of common shares, shares     (443,041)      
Equity, balance at Dec. 31, 2018 $ 55,570,501   $ 51,098,613 4,746,154   (274,266)
Equity, common shares outstanding at Dec. 31, 2018 15,481,497   15,481,497      
Increase (Decrease) in Shareholders' Equity [Roll Forward]            
Net income (loss) attributable to common shareholders $ (3,537,759)     (3,537,759)    
Net loss at subsidiary attributable to noncontrolling interests (8,752)         (8,752)
Net income (loss) (3,546,511)          
Repurchase of subsidiary shares to noncontrolling interest (800,000)   $ (685,805)     (114,195)
Sale of subsidiary shares to noncontrolling interest 1,000,000   640,407     359,593
Vesting of common stock 862,200   $ 862,200      
Vesting of common stock, shares     180,000      
Share-based compensation, amount 1,485,898   $ 1,485,898      
Share-based compensation, shares     225,536      
Repurchase of common shares (3,486,835)   $ (3,486,835)      
Repurchase of common shares, shares     (623,478)      
Equity, balance at Dec. 31, 2019 $ 51,085,253   $ 49,914,478 $ 1,208,395   $ (37,620)
Equity, common shares outstanding at Dec. 31, 2019 15,263,555   15,263,555