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Convertible Senior Notes and Capped Call Transactions (Tables)
6 Months Ended
Jun. 30, 2022
Debt Disclosure [Abstract]  
Schedule of Net Carrying Amount of Liability and Equity Components of Convertible Notes
The net carrying amount of the 2025 Notes was as follows (in thousands):
June 30, 2022
(unaudited)
Principal$253,000 
Unamortized issuance costs(4,784)
Net carrying amount$248,216 
Schedule of Interest Expense
The interest expense recognized related to the 2025 Notes for the three and six months ended June 30, 2022 and 2021 was as follows (in thousands):
Three Months Ended
June 30,
Six Months Ended
June 30,
2022202120222021
(unaudited)
(unaudited)
Contractual interest expense$790 $790 $1,581 $1,580 
Amortization of debt discount— 1,405 — 2,794 
Amortization of debt issuance costs371 303 740 603 
Total$1,161 $2,498 $2,321 $4,977