Quarterly report pursuant to Section 13 or 15(d)

Notes Payable - Additional Information (Details)

v3.19.3
Notes Payable - Additional Information (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Mar. 29, 2019
USD ($)
item
$ / shares
shares
Sep. 30, 2019
USD ($)
Sep. 30, 2019
USD ($)
Debt Instrument [Line Items]      
Total amount available $ 20,000    
Proceeds from Horizon Notes 15,000    
Remaining amount fundable $ 5,000    
Maturity of each advance 42 months    
Number of advances | item 3    
Base interest rate (as a percent) 9.00% 2.50% 2.50%
Variable interest rate floor (as a percent) 2.50%    
Number of monthly installments | item 18    
Prepayment notice period 10 days    
Prepayment charge threshold $ 500    
Prepayment charge (as a percent) 4.00%    
Prepayment charge, second period (as a percent) 3.00%    
Prepayment charge, thereafter (as a percent) 2.00%    
Final payment fee per advance $ 250    
Final payment fee 750 $ 750 $ 750
Default threshold $ 250    
Minimum monthly cash balance, range     9,400
Percentage of warrant coverage 5.00%    
Number of warrant instruments | item 4    
Shares issued for warrants | shares 288,184    
Warrant exercise price (in dollars per share) | $ / shares $ 3.47    
Fair value of warrants $ 900    
Warrant exercise period 10 years    
Warrant stand-by period 6 months    
Commitment fee $ 200    
Legal and other direct costs $ 1,200    
Amortization of debt discount   $ 500 $ 300
Accrued interest percentage 5.00%    
Horizon Notes      
Debt Instrument [Line Items]      
Legal fees paid $ 30    
Minimum      
Debt Instrument [Line Items]      
Minimum monthly cash balance, range 8,000    
Maximum      
Debt Instrument [Line Items]      
Minimum monthly cash balance, range $ 13,000