Quarterly report pursuant to Section 13 or 15(d)

NOTE PAYABLE - Narrative (Details)

v3.20.2
NOTE PAYABLE - Narrative (Details) - USD ($)
9 Months Ended 55 Months Ended
Sep. 03, 2019
Feb. 18, 2016
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Apr. 15, 2020
Debt Instrument [Line Items]            
Payments of principal of note payable $ (2,600,000)   $ 0 $ (4,808,000)    
Payment of associated accrued interest and aggregate end-of-term payment $ 600,000          
Paycheck Protection Program            
Debt Instrument [Line Items]            
Face amount           $ 400,000
Stated rate           1.00%
Note Payable            
Debt Instrument [Line Items]            
Face amount   $ 7,500,000        
Facility fees         $ 200,000  
Interest Rate Option 1 | Note Payable            
Debt Instrument [Line Items]            
Stated rate   9.20%        
Interest Rate Option 2 | Note Payable            
Debt Instrument [Line Items]            
Stated rate   9.20%        
Interest Rate Option 2 | Note Payable | Prime Rate            
Debt Instrument [Line Items]            
Basis spread on variable rate   3.50%        
Hercules Capital Warrants            
Debt Instrument [Line Items]            
Warrants converted (in shares)         9,005  
Exercise price (in usd per share)   $ 33.31