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Debt - Summary of Long Term Debt (Details)
$ in Thousands
6 Months Ended
Jun. 30, 2020
USD ($)
day
Dec. 31, 2019
USD ($)
Senior Loans | Senior Secured Term Loan due 2023    
Debt Instrument [Line Items]    
Long-term debt $ 150,000 $ 150,000
Less: debt discount (1,909) (2,315)
Less: deferred financing (257) (311)
Net carrying value 147,834 147,374
Convertible Notes | Convertible Senior Notes 2016, Due 2023    
Debt Instrument [Line Items]    
Long-term debt 2,825 2,825
Less: debt discount (591) (659)
Less: deferred financing (31) (35)
Net carrying value $ 2,203 $ 2,131
Threshold percentage 130.00%  
Threshold consecutive trading days | day 30  
Convertible Notes | Convertible Senior Notes 2016, Due 2023 | Minimum    
Debt Instrument [Line Items]    
Threshold trading days 20 days