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Debt (Tables)
 9 Months Ended
Sep. 30, 2022
Debt Disclosure [Abstract]  
Schedule of Net Carrying Amount of Debt The 2025 Notes consist of the following (in thousands):
September 30,
2022		December 31,
2021
Principal$161,898 $161,898 
Add: fair value of embedded derivative 24 926 
Less: unamortized debt discount (2,140)(2,761)
Less: unamortized issuance costs(1,703)(2,197)
Net carrying amount$158,079 $157,866 
Schedule of Interest Expense The following table sets forth total interest expense recognized related to the 2025 Notes (in thousands):
Three Months Ended September 30,Nine Months Ended September 30,
2022202120222021
Contractual interest expense$1,315 $1,315 $3,946 $3,899 
Amortization of debt discount207 207 621 622 
Amortization of debt issuance costs165 165 494 495 
Total interest expense$1,687 $1,687 $5,061 $5,016