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STOCK PURCHASE WARRANTS (Details)
3 Months Ended 12 Months Ended
Sep. 09, 2016
holder
$ / shares
shares
Mar. 31, 2017
$ / shares
shares
Dec. 31, 2016
$ / shares
August 2013 Warrants      
Stock Purchase Warrants      
Exercise price per share (in dollars per share)   $ 4.80  
Total shares issuable on exercise (in shares) | shares   724,950  
Assumptions used in calculating the estimated fair value of the warrants      
Closing stock price (in dollars per share)   $ 2.8 $ 3
Expected dividend rate   0.00% 0.00%
Expected stock price volatility   104.10% 97.90%
Risk-free interest rate   1.00% 1.00%
Expected life   1 year 4 months 17 days 1 year 7 months 12 days
September 2016 Warrants      
Stock Purchase Warrants      
Exercise price per share (in dollars per share)   $ 2.48  
Total shares issuable on exercise (in shares) | shares   117,074  
Warrants issued (in shares) | shares 117,074    
Number of warrant holders | holder 2    
Assumptions used in calculating the estimated fair value of the warrants      
Closing stock price (in dollars per share) $ 2.20    
Expected dividend rate 0.00%    
Expected stock price volatility 89.80%    
Risk-free interest rate 1.40%    
Expected life 6 years