Quarterly report pursuant to Section 13 or 15(d)

EMPLOYEE STOCK OPTIONS AND RESTRICTED STOCK AWARD PLAN - Additional Information (Details)

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EMPLOYEE STOCK OPTIONS AND RESTRICTED STOCK AWARD PLAN - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2013
Dec. 31, 2011
EMPLOYEE STOCK OPTIONS AND RESTRICTED STOCK AWARD PLAN            
Compensation Expenses Charged Against Income For Share Based Awards Included In General And Administrative Expenses $ 808,734 $ 1,081,199 $ 1,643,199 $ 2,083,547    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized           2,500,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized         5,000,000  
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 668,340   668,340      
Share-based Compensation Arrangement by Share-based Payment Award, Per Share Weighted Average Price of Shares Purchased $ 3.25   $ 3.25      
Employee Stock Option            
EMPLOYEE STOCK OPTIONS AND RESTRICTED STOCK AWARD PLAN            
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options $ 1,239,664   $ 1,239,664      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition     1 year 8 months 12 days      
Restricted Stock            
EMPLOYEE STOCK OPTIONS AND RESTRICTED STOCK AWARD PLAN            
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options $ 4,046,963   $ 4,046,963      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition     1 year 10 months 24 days