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STOCK BASED COMPENSATION (Narrative) (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Pricing model used in calculation of grant-date fair value Black-Scholes Black-Scholes  
Expected dividend yield
Expected volatility, minimum 74.00% 75.00% 70.25%
Expected volatility, maximum 78.00% 79.00% 109.00%
Risk-free interest rate, minimum 1.39% 1.44% 0.58%
Risk-free interest rate, maximum 1.80% 1.70% 2.08%
Unrecognized compensation expense related to non-vested market-based share awards $ 262,726 $ 209,618  
Non Qualified Stock Options And Warrants [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Aggregate intrinsic value of options and warrants outstanding and exercisable $ 125 $ 0  
Closing stock price of common stock $ 0.6025 $ 0.585  
Intrinsic value of options and warrants exercised   $ 232,139
Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected option life 5 years 5 years 2 years 1 month 17 days
Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected option life 5 years 4 months 24 days 5 years 9 months 7 years 3 months