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DEBT AND FINANCING ARRANGEMENTS (Tables)
 9 Months Ended
Sep. 30, 2024
Debt Disclosure [Abstract]  
Schedule of Debt
Our debt consists of the following (in thousands):
September 30, 2024December 31, 2023
Line of Credit$— $30,000 
2024 Convertible Senior Notes, net167,448 — 
2020 Convertible Senior Notes, net45,789 227,504 
Total debt$213,237 $257,504 
Convertible Debt
The net carrying amount of the liability component of the 2024 Convertible Senior Notes is as follows (in thousands):

September 30, 2024
Principal$172,500 
Minus:
Unamortized issuance costs(5,052)
Net carrying amount$167,448 
Interest expense recognized related to the 2024 Convertible Senior Notes is as follows (in thousands):
Three Months Ended September 30,Nine Months Ended September 30,
20242024
Contractual interest expense (due in cash)$1,833 $3,645 
Amortization of debt issuance costs281 558 
Total interest expense related to the 2024 Convertible Senior Notes$2,114 $4,203 
Effective interest rate4.90 %4.90 %
The net carrying amount of the liability component of the 2020 Convertible Senior Notes is as follows (in thousands):

September 30, 2024December 31, 2023
Principal$46,070 $230,000 
Minus:
Unamortized issuance costs(281)(2,496)
Net carrying amount of the liability component$45,789 $227,504 

Interest expense recognized related to the 2020 Convertible Senior Notes is as follows (in thousands):
Three Months Ended
September 30,		Nine Months Ended
September 30,
2024202320242023
Contractual interest expense (due in cash)$115 $575 $805 $1,725 
Amortization of debt issuance costs73 365 511 1,096 
Total interest expense related to the 2020 Convertible Senior Notes$188 $940 $1,316 $2,821 
Effective interest rate1.64 %1.64 %1.64 %1.64 %