Quarterly report pursuant to Section 13 or 15(d)

Debt (Details)

v3.20.2
Debt (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2020
May 31, 2020
Debt Instrument [Line Items]      
Interest expense $ 353,000 $ 495,000  
Credit Agreement      
Debt Instrument [Line Items]      
Maximum borrowing capacity 60,000,000.0 60,000,000.0  
Remaining borrowing capacity 40,000,000.0 40,000,000.0 $ 10,000,000.0
Debt issuance costs being amortized ratably 236,000 236,000  
Unamortized issuance costs and debt discounts 184,000 184,000  
Interest expense 353,000 593,000  
Accrued interest   194,000  
Outstanding balance 19,800,000 19,800,000  
Covenant, cash $ 10,000,000.0 $ 10,000,000.0  
Final payment fee, percentage of principal   2.50%  
Credit Agreement | LIBOR      
Debt Instrument [Line Items]      
Basis spread on variable rate   5.65%  
Floor rate 1.50% 1.50%  
Credit Agreement | as of September 27, 2019      
Debt Instrument [Line Items]      
Maximum borrowing capacity $ 10,000,000.0 $ 10,000,000.0  
Credit Agreement | until December 31, 2020      
Debt Instrument [Line Items]      
Maximum borrowing capacity 10,000,000.0 10,000,000.0  
Credit Agreement | until March 31, 2021      
Debt Instrument [Line Items]      
Maximum borrowing capacity 20,000,000.0 20,000,000.0  
Credit Agreement | until March 31, 2022      
Debt Instrument [Line Items]      
Maximum borrowing capacity $ 20,000,000.0 $ 20,000,000.0  
Credit Agreement | Initial interest-only payment period      
Debt Instrument [Line Items]      
Interest-only payments period   24 months  
Credit Agreement | First conditional interest-only payment period      
Debt Instrument [Line Items]      
Interest-only payments period   36 months  
Credit Agreement | Second conditional interest-only payment period      
Debt Instrument [Line Items]      
Interest-only payments period   48 months