Quarterly report pursuant to Section 13 or 15(d)

Borrowings - Schedule of Borrowings (Details)

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Borrowings - Schedule of Borrowings (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Debt Instrument [Line Items]      
Principal repayment obligation and other fees $ 17,000   $ 119,217
Unamortized deferred financing costs, discounts and fees (152)   (8,123)
Total borrowings 16,848   111,094
Interest elected to be paid-in-kind 508 $ 130  
2018 Term Loan, due September 2021      
Debt Instrument [Line Items]      
Principal repayment obligation and other fees 17,000   60,000
Unamortized deferred financing costs, discounts and fees (152)   (805)
Total borrowings 16,848   59,195
2019 Term Loan      
Debt Instrument [Line Items]      
Principal repayment obligation and other fees 0   43,217
Unamortized deferred financing costs, discounts and fees 0   (4,942)
Total borrowings 0   38,275
Interest elected to be paid-in-kind     3,300
2020 Unsecured Note      
Debt Instrument [Line Items]      
Principal repayment obligation and other fees 0   16,000
Unamortized deferred financing costs, discounts and fees 0   (2,376)
Total borrowings $ 0   $ 13,624