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Debt - Summary of Components of Long-Term Debt Obligations (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]    
Total debt $ 316,250,000 $ 316,250,000
Less: deferred debt discount (26,310,000) (35,393,000)
Less: deferred debt issue costs (3,809,000) (5,248,000)
Long-term debt, net 286,131,000 275,609,000
Additional paid-in capital 35,306,000 35,306,000
Discount attribution to equity (1,175,000) (1,175,000)
Equity component, net 34,131,000 34,131,000
Long-term debt, current portion 0 0
Convertible Note Due 2023    
Debt Instrument [Line Items]    
Total debt $ 316,250,000 $ 316,250,000