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STOCKHOLDERS' EQUITY (Common Stock) (Details)
 1 Months Ended 9 Months Ended
Jul. 07, 2015
USD ($)
$ / shares
shares
Feb. 27, 2015
USD ($)
$ / shares
$ / unit
shares
Oct. 22, 2014
USD ($)
$ / shares
shares
Jan. 24, 2013
USD ($)
$ / shares
shares
Feb. 02, 2012
USD ($)
$ / shares
shares
Dec. 31, 2011
USD ($)
Sep. 30, 2015
USD ($)
$ / shares
shares
Jun. 30, 2015
$ / shares
shares
Jan. 20, 2015
USD ($)
Jan. 15, 2015
$ / shares
shares
Dec. 31, 2014
USD ($)
$ / shares
shares
Oct. 21, 2014
$ / shares
shares
Mar. 05, 2014
$ / shares
shares
Class of Stock [Line Items]                          
Common stock, shares authorized (in shares)             150,000,000       150,000,000    
Common stock, shares issued (in shares)             13,915,691       8,084,471    
Common stock warrant, common stock called (in shares) 2,188,177 1,881,396 1,309,785         1,881,396   1,483,161 1,387,685 1,212,665  
Common stock warrant, exercise price (in dollars per share) | $ / shares $ 6.50 $ 7.56 $ 10.86         $ 7.56   $ 9.59 $ 10.25 $ 11.73  
Private placement, net (in shares) 1,500,000                        
Share price (in dollars per share) | $ / shares $ 1.42           $ 0.92            
Private placement, net | $             $ 8,969,000            
Proceeds from issuance of common stock and warrants | $ $ 3,000,000                        
Craig-Hallum Capital Group LLC                          
Class of Stock [Line Items]                          
Warrants term 5 years                        
Common stock warrant, exercise price (in dollars per share) | $ / shares $ 1.66                        
Payments of stock issuance costs | $ $ 212,783                        
Payments of stock issuance costs, percentage of gross offering proceeds 7.00%                        
Payments of stock issuance costs, warrant right to purchase common stock shares 107,033                        
Stock issuance costs, reimbursable expenses (not to exceed) | $ $ 50,000                        
Convertible notes payable                          
Class of Stock [Line Items]                          
Face amount | $                     $ 750,000    
Maximum                          
Class of Stock [Line Items]                          
Common stock warrant, common stock called (in shares)       1,097,600                  
Common stock warrant, exercise price (in dollars per share) | $ / shares       $ 15.00                  
Minimum                          
Class of Stock [Line Items]                          
Common stock warrant, common stock called (in shares)       948,333                  
Common stock warrant, exercise price (in dollars per share) | $ / shares       $ 12.96                  
Third Security LLC and affiliates | Maximum                          
Class of Stock [Line Items]                          
Common stock warrant, common stock called (in shares)                         1,212,665
Common stock warrant, exercise price (in dollars per share) | $ / shares                         $ 12.96
Third Security LLC and affiliates | Minimum                          
Class of Stock [Line Items]                          
Common stock warrant, common stock called (in shares)                         1,097,600
Common stock warrant, exercise price (in dollars per share) | $ / shares                         $ 11.73
Series A Warrants                          
Class of Stock [Line Items]                          
Warrants term 5 years 6 months                        
Warrants, period exercisable 6 months                        
Series B Warrants                          
Class of Stock [Line Items]                          
Warrants term 5 years 6 months                        
Common stock warrant, exercise price (in dollars per share) | $ / shares $ 0.01                        
Share price (in dollars per share) | $ / shares $ 1.42                        
Series B Warrants | Maximum                          
Class of Stock [Line Items]                          
Common stock warrant, common stock called (in shares) 700,000.0                        
Warrants                          
Class of Stock [Line Items]                          
Common stock warrant, exercise price (in dollars per share) | $ / shares $ 1.66                        
Warrants | Maximum                          
Class of Stock [Line Items]                          
Common stock warrant, common stock called (in shares) 1,200,000.0                        
Private Placement                          
Class of Stock [Line Items]                          
Proceeds from issuance of common stock and convertible notes | $         $ 22,000,000 $ 3,000,000              
Common stock, shares issued (in shares)         1,583,333                
Common stock, sale price per share (in dollars per share) | $ / shares         $ 12                
Warrants term         5 years                
Common stock warrant, common stock called (in shares)         823,333                
Common stock warrant, exercise price (in dollars per share) | $ / shares         $ 15.00                
Payments of stock issuance costs | $         $ 1,330,000                
Payments of stock issuance costs, percentage of gross offering proceeds         7.00%                
Payments of stock issuance costs, warrant right to purchase common stock shares         31,666                
Payments of stock issuance costs, warrant right to purchase common stock shares, percentage of shares in offering         2.00%                
Stock issuance costs, reimbursable expenses (not to exceed) | $         $ 125,000                
Payments of stock issuance costs, reduction to equity | $         $ 1,500,000                
Private Placement | Third Security LLC and affiliates                          
Class of Stock [Line Items]                          
Convertible notes, common stock callable (in shares)         250,000                
Convertible notes, warrants callable (in shares)         125,000                
Offering                          
Class of Stock [Line Items]                          
Common stock warrant, common stock called (in shares)       691,655                  
Private placement, net (in shares)       1,383,333                  
Share price (in dollars per share) | $ / shares       $ 6.00                  
Private placement, net | $       $ 8,300,000                  
Class of warrant or right, number of securities called by warrants or rights, price per share (in dollars per share) | $ / shares       $ 9.00                  
Offering | Affiliates of Third Security, LLC; January 2018                          
Class of Stock [Line Items]                          
Common stock warrant, common stock called (in shares)       250,000                  
Private placement, net (in shares)       500,000                  
2014 Private Placement                          
Class of Stock [Line Items]                          
Common stock warrant, common stock called (in shares)     365,388                    
Common stock warrant, exercise price (in dollars per share) | $ / shares     $ 4.00                    
Private placement, net (in shares)     730,776                    
Share price (in dollars per share) | $ / shares     $ 3.25                    
Private placement, net | $     $ 2,400,000                    
2014 Private Placement | Advisor                          
Class of Stock [Line Items]                          
Common stock warrant, common stock called (in shares)     9,230                    
Additional Note Private Placement | Convertible notes payable                          
Class of Stock [Line Items]                          
Face amount | $                 $ 925,000        
2015 Offering | Craig-Hallum Capital Group LLC                          
Class of Stock [Line Items]                          
Common stock warrant, common stock called (in shares)   714,780                      
Common stock warrant, exercise price (in dollars per share) | $ / shares   $ 2.24                      
Private placement, net (in shares)   3,573,899                      
Class of warrant or right, number of securities called by each warrant or right (in shares)   0.20                      
Class of warrant or right, purchase price per share, public (in dollars per share) | $ / unit   1.95                      
Class of warrant or right, purchase price per share, underwriter (in dollars per share) | $ / unit   1.8135                      
Proceeds from issuance of common stock and warrants, net | $   $ 6,200,000                      
Class of warrant or right, expiration period   5 years