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CONVERTIBLE BRIDGE LOAN (2017 New Bridge Notes II) (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
Jun. 29, 2017
Mar. 31, 2016
Sep. 30, 2017
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Jun. 13, 2017
Dec. 31, 2016
Dec. 31, 2015
Short-term Debt [Line Items]                    
Underlying shares (shares)   1,958,204   268,379   268,379        
Warrants, fair value $ 211,000 $ 1,421,738   $ 211,000   $ 211,000        
Class of warrant or right, term   10 years                
Merger advisory fees       2,603,000 $ 0 2,603,000 $ 0      
Total debt       513,000   513,000     $ 4,522,000  
Accrued interest                 61,073  
Subsequent Event                    
Short-term Debt [Line Items]                    
Proceeds from equity financing     $ 7,000,000              
Side Warrants                    
Short-term Debt [Line Items]                    
Warrants, fair value       487,000   487,000        
Merger advisory fees       414,000   414,000        
Side Warrants | Upon Execution                    
Short-term Debt [Line Items]                    
Warrants, fair value       $ 73,000   $ 73,000        
Common Stock                    
Short-term Debt [Line Items]                    
Conversion price (usd per share)               $ 10.2502    
Underlying shares (shares) 45,600                  
Exercise Price (in dollars per share) $ 7.50                  
Common Stock | Side Warrants                    
Short-term Debt [Line Items]                    
Underlying shares (shares)       91,429   91,429        
Exercise Price (in dollars per share)       $ 7.00   $ 7.00        
Class of warrant or right, term           5 years        
Merger advisory fees       $ 414,000   $ 414,000        
Common Stock | Side Warrants | Upon Execution                    
Short-term Debt [Line Items]                    
Underlying shares (shares)       22,857   22,857        
Common Stock | Side Warrants | Performance Based                    
Short-term Debt [Line Items]                    
Underlying shares (shares)       68,572   68,572        
Warrants, fair value       $ 73,000   $ 73,000        
Bridge Loan | 2017 New Bridge Notes II                    
Short-term Debt [Line Items]                    
Sale of debt $ 800,000                  
Proceeds from sale of debt instrument $ 721,000                  
Interest rate (as a percent) 8.00%                  
Conversion price (usd per share) $ 3.736329                  
Premium rate changed upon settlement of debt 20.00%                  
Premium on debt settlement $ 160,000                  
Discount on debt       656,000   656,000        
Bridge Loan | Convertible Bridge Loan                    
Short-term Debt [Line Items]                    
Interest rate (as a percent)                   14.00%
Discount on debt       1,700,000   1,700,000        
Total debt       2,000,000   2,000,000     $ 695,000  
Debt issuance cost       100,000   100,000        
Accrued interest       $ 10,000   $ 10,000        
Bridge Loan | Convertible Bridge Loan | Common Stock                    
Short-term Debt [Line Items]                    
Accrued interest $ 192,000