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TERM LOAN PAYABLE (Details)
$ in Thousands
1 Months Ended 12 Months Ended
Nov. 30, 2018
Dec. 31, 2019
USD ($)
Jan. 31, 2018
USD ($)
Aug. 28, 2012
USD ($)
Existing Term Loan        
Loan and Security Agreements        
Maximum borrowing capacity       $ 1,000
Consent and Amendment        
Loan and Security Agreements        
Original principal amount     $ 11,500  
Variable interest rate margin (as a percent)   0.75%    
Final payment fee   $ 719    
Amended Term Loan        
Loan and Security Agreements        
Minimum liquidity ratio 1.5 1.0    
Additional interest rate in event of default   5.0    
Prior to first anniversary | Consent and Amendment        
Loan and Security Agreements        
Prepayment fee (as a percent)   3.0    
Between first anniversary and second anniversary | Consent and Amendment        
Loan and Security Agreements        
Prepayment fee (as a percent)   2.0    
Following second anniversary | Consent and Amendment        
Loan and Security Agreements        
Prepayment fee (as a percent)   1.0