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FINANCING ARRANGEMENTS (Tables)
 6 Months Ended
Jun. 30, 2026
Debt Disclosure [Abstract]  
Schedule of Long-Term Debt Instruments
The following table summarizes the outstanding debt obligations as of June 30, 2026 and December 31, 2025 and related maturity dates, contractual interest rates and carrying amounts:

June 30, 2026December 31, 2025
Instrument / DescriptionContractual Interest RatePrincipal amountUnamortized debt issuance costs and discountsUnamortized debt premiumCarrying amountPrincipal amountUnamortized debt issuance costs and discountsUnamortized debt premiumCarrying amount
2026 Notes, due March 15, 20261.125%$— $— $— $— $33,740 $(49)$— $33,691 
2027 Notes, due March 15, 2027 (1)
6.250%46,210 (278)— 45,932 46,210 (466)— 45,744 
2030 Notes, due June 30, 20304.875%244,071 (1,837)19,154 261,388 244,071 (2,066)21,406 263,411 
Total convertible senior notes$290,281 $(2,115)$19,154 $307,320 $324,021 $(2,581)$21,406 $342,846 
Less: Current portion of convertible senior notes, net(45,932)(33,691)
Convertible senior notes, net$261,388 $309,155 
(1)     The original principal of the 2027 Notes at issuance was recorded at fair value of $196.2 million, which is equal to the exchanged principal of $176.3 million of the 2026 Notes and cash consideration received of $19.9 million. After the exchange on July 2, 2025, the remaining fair value of the principal recorded at issuance of the 2027 Notes was $46.2 million.
Schedule of Interest Costs on Notes
During the three and six months ended June 30, 2026, we recognized interest costs on the 2030 Notes as follows (in thousands):

Three Months Ended June 30, Six Months Ended June 30,
2026
Contractual interest
$2,974 $5,949 
Amortization of debt premium and debt issuance costs, net
(1,015)(2,023)
Total $1,959 $3,926 
For the three and six months ended June 30, 2026 and 2025, we recognized interest costs on the 2027 Notes as follows (in thousands):

Three Months Ended June 30, Six Months Ended June 30,
2026202520262025
Contractual interest
$739 $3,082 $1,477 $6,164 
Amortization of debt discount
95 379 188 751 
Total $834 $3,461 $1,665 $6,915 
During the three and six months ended June 30, 2026 and 2025, we recognized interest costs on the 2026 Notes as follows (in thousands):
Three Months Ended June 30, Six Months Ended June 30,
2026202520262025
Contractual interest$— $151 $79 $302 
Amortization of debt discount— 94 49 187 
Total $— $245 $128 $489