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Debt (Tables)
 9 Months Ended
Sep. 30, 2022
Debt Disclosure [Abstract]  
Schedule of convertible notes payable
Total convertible notes payable consisted of the following (in thousands):
September 30, 2022December 31, 2021
Principal amount of Notes$325,000 $325,000 
Unamortized debt issuance costs(475)(1,542)
Total convertible notes payable(1)
$324,525 $323,458 
(1)    Convertible notes are classified as current liabilities and as non-current liabilities in the consolidated balance sheets as of September 30, 2022 and December 31, 2021, respectively.
Schedule of interest expense
The interest expense incurred in connection with the Notes consisted of the following (in thousands):
Three Months Ended
September 30,		Nine Months Ended
September 30,
2022202120222021
Coupon interest at 3.75%
$3,047 $3,047 $9,141 $9,141 
Amortization of debt issuance costs356 356 1,068 1,068 
Total interest expense on Notes$3,403 $3,403 $10,209 $10,209