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STOCKHOLDERS' EQUITY (Common Stock) (Details)
 1 Months Ended 12 Months Ended
Jul. 07, 2015
USD ($)
$ / shares
shares
Feb. 27, 2015
USD ($)
$ / shares
$ / unit
shares
Oct. 22, 2014
USD ($)
$ / shares
shares
Mar. 13, 2013
shares
Jan. 24, 2013
USD ($)
$ / shares
shares
Feb. 02, 2012
USD ($)
$ / shares
shares
Dec. 29, 2010
USD ($)
Dec. 31, 2011
USD ($)
Dec. 31, 2015
USD ($)
$ / shares
shares
Dec. 31, 2014
USD ($)
$ / shares
shares
Jun. 30, 2015
$ / shares
shares
Jan. 20, 2015
USD ($)
Jan. 15, 2015
USD ($)
$ / shares
shares
Oct. 21, 2014
$ / shares
shares
Mar. 05, 2014
$ / shares
shares
Jan. 31, 2013
$ / shares
shares
Class of Stock [Line Items]                                
Common stock, shares authorized [1]                 150,000,000 100,000,000            
Proceeds from issuance of common stock and convertible notes | $             $ 6,000,000                  
Common stock, shares issued [1]                 13,915,691 8,084,471            
Common stock warrant, common stock called (in shares) 2,188,177 1,881,396 1,309,785   691,656 948,333     1,387,685 1,387,685 1,881,396   1,483,161 1,212,665   1,097,600
Common stock warrant, exercise price (in usd per share) | $ / shares $ 6.50 $ 7.56 $ 10.86     $ 15.00     $ 10.25 $ 10.25 $ 7.56   $ 9.59 $ 11.73   $ 12.96
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 | $           $ 125,000                    
Payments of stock issuance costs, reduction to equity | $           $ 1,500,000                    
Private placement, net, shares 1,500,000       1,383,333                      
Share price (in usd per share) | $ / shares $ 1.42       $ 6.00       $ 1.07              
Private placement, net | $         $ 8,300,000       $ 8,970,000 $ 2,361,000            
Class of warrant or right, number of securities called by warrants or rights, price per share (in usd per share) | $ / shares         $ 9.00                      
Proceeds from issuance of common stock and warrants | $ $ 3,000,000                              
Common stock warrants term           5 years                    
Third Security LLC And Affiliates                                
Class of Stock [Line Items]                                
Common stock warrant, common stock called (in shares)                             1,212,665 1,097,600
Common stock warrant, exercise price (in usd per share) | $ / shares                             $ 11.73 $ 12.96
Convertible notes, warrants callable (in shares)           125,000                    
Affiliates of Third Security, LLC; January 2018                                
Class of Stock [Line Items]                                
Common stock warrant, common stock called (in shares)       250,000                        
Common stock warrant, exercise price (in usd per share) | $ / shares                 $ 9              
Private placement, net, shares       500,000                        
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           1,583,333                    
Common stock, sale price per share (in usd per share) | $ / shares           $ 12                    
Common stock warrant, common stock called (in shares)     365,388                          
Common stock warrant, exercise price (in usd per share) | $ / shares     $ 4.00                          
Private placement, net, shares     730,776                          
Share price (in usd per share) | $ / shares     $ 3.25                          
Private placement, net | $     $ 2,375,000                          
Common stock warrants term           5 years                    
Private Placement | Advisor                                
Class of Stock [Line Items]                                
Common stock warrant, common stock called (in shares)     9,230                          
Maximum                                
Class of Stock [Line Items]                                
Common stock warrant, common stock called (in shares)           823,333                    
Convertible Promissory Note                                
Class of Stock [Line Items]                                
Debt instrument, face amount | $                 $ 750,000 $ 750,000            
Convertible Promissory Note | Additional Note Private Placement                                
Class of Stock [Line Items]                                
Debt instrument, face amount | $                       $ 925,000        
Craig-Hallum Capital Group LLC                                
Class of Stock [Line Items]                                
Common stock warrant, exercise price (in usd per share) | $ / shares $ 1.66                              
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 | $ $ 50,000                              
Common stock warrants term 5 years                              
Craig-Hallum Capital Group LLC | Two Thousand Fifteen Offering                                
Class of Stock [Line Items]                                
Common stock warrant, common stock called (in shares)   714,780                            
Common stock warrant, exercise price (in usd per share) | $ / shares   $ 2.24                            
Private placement, net, shares   3,573,899                            
Number of shares that can be purchased for each warrant   0.20                            
Purchase price to the public (in usd per unit) | $ / unit   1.95                            
Purchase price of stock and warrants (in usd per unit) | $ / unit   1.8135                            
Net proceeds from the offering | $   $ 6,200,000                            
Craig-Hallum Capital Group LLC | Convertible Promissory Note | Additional Note Private Placement                                
Class of Stock [Line Items]                                
Debt instrument, face amount | $                         $ 46,250      
Percentage of proceeds from sale and issuance of the Additional Notes                         5.00%      
Series A Warrants                                
Class of Stock [Line Items]                                
Common stock warrants term 5 years 6 months                              
Third Security LLC And Affiliates | Private Placement                                
Class of Stock [Line Items]                                
Convertible notes, common stock callable (in shares)           250,000                    
Series B Warrants                                
Class of Stock [Line Items]                                
Common stock warrant, exercise price (in usd per share) | $ / shares $ 0.01                              
Share price (in usd per share) | $ / shares $ 1.42                              
Common stock warrants term 5 years 6 months                              
Series B Warrants | Maximum                                
Class of Stock [Line Items]                                
Common stock warrant, common stock called (in shares) 700,000.0                              
Series A and Series B Warrants                                
Class of Stock [Line Items]                                
Common stock warrant, exercise price (in usd per share) | $ / shares $ 1.66                              
Series A and Series B Warrants | Maximum                                
Class of Stock [Line Items]                                
Common stock warrant, common stock called (in shares) 1,200,000.0                              
[1] The common stock shares and additional paid-in capital for all periods presented reflect the one-for-twelve reverse stock split which took effect on January 27, 2014.