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STOCK-BASED COMPENSATION (Details) - Employee Stock Option [Member] - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of Shares, Outstanding 418,233  
Number of Shares, Granted 0  
Number of Shares, Exercised (184,480)  
Number of Shares, Forfeited 0  
Number of Shares, Expired 0  
Number of Shares, Outstanding 233,753 418,233
Number of Shares, Vested 144,753  
Weighted Average Exercise Price per share, Outstanding (in dollars per share) $ 5.17  
Weighted Average Exercise Price per share, Granted (in dollars per share) 0  
Weighted Average Exercise Price per share, Exercised (in dollars per share) 3.99  
Weighted Average Exercise Price per share, Forfeited (in dollars per share) 0  
Weighted Average Exercise Price per share, Expired (in dollars per share) 0  
Weighted Average Exercise Price per share, Outstanding (in dollars per share) 6.10 $ 5.17
Weighted Average Exercise Price per share, Vested (in dollars per share) $ 5.49  
Weighted Average Remaining ContractualLife, Outstanding (Years) 5 years 10 months 24 days 3 years 9 months 18 days
Weighted Average Remaining Contractual Life, Vested (Years) 3 years 9 months 18 days  
Aggregate Intrinsic Value, Outstanding and Vested (in dollars) $ 617,693 $ 1,343,442
Aggregate Intrinsic Value, Vested (in dollars) $ 470,843