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Convertible Senior Notes (Tables)
3 Months Ended
Mar. 31, 2023
Convertible Senior Notes  
Schedule of convertible senior notes payable

Convertible Senior Notes payable consisted of the following at March 31, 2023 and December 31, 2022 (in thousands):

March 31, 

December 31, 

    

2023

    

2022

Principal amount of 2025 Senior Notes

$

14,344

$

14,344

Principal amount of 2026 Senior Notes

 

402,500

 

402,500

Less: unamortized debt issuance costs

(9,495)

(10,136)

Net carrying value of Convertible Senior Notes payable

$

407,349

$

406,708

Schedule of interest expenses incurred in connection with the convertible senior notes

Interest expense incurred in connection with the Senior Notes consisted of the following for the three months ended March 31, 2023 and 2022 (in thousands):

March 31, 

    

2023

    

2022

Coupon interest

$

862

$

862

Amortization of debt issuance costs

641

631

Total interest expense on Convertible Senior Notes

$

1,503

$

1,493