Quarterly report pursuant to Section 13 or 15(d)

Borrowings - Short-term Borrowings (Details)

v3.19.2
Borrowings - Short-term Borrowings (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2019
Jun. 30, 2018
May 23, 2019
Short-term Debt [Line Items]        
Paid-in-kind interest each quarter (as a percentage) (up to) 4.00% 4.00%    
2019 Term Loan paid-in-kind election   $ 240,000 $ 0  
Fair value of warrant       $ 3,300,000
Term loan | 2019 Term Loan        
Short-term Debt [Line Items]        
Principal amount       60,000,000.0
Deferred financing costs       $ 2,200,000
Debt interest rate (as a percentage) 12.00% 12.00%   12.00%
Paid-in-kind interest each quarter (as a percentage) (up to)       4.00%
2019 Term Loan paid-in-kind election $ 200,000      
Final fee (as a percentage)       20.00%
Final Payment Fee $ 9,800,000 $ 9,800,000    
Fair value of warrant       $ 3,300,000
Right to additional borrowing       $ 15,000,000.0