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Debt | 12 Months Ended
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Dec. 31, 2024
Debt Disclosure [Abstract] |
Debt | Debt The following table presents the carrying value of the Company’s debt obligations as of December 31, 2024 and 2023:
(In thousands) |  | 2024 |  | 2023
Convertible senior notes—interest accrues from August 2021 and is payable semiannually in arrears on February 15 and August 15 of each year, beginning February 2022, maturing August 2026; interest at 0.25% per annum |  | $ | 360,998 |  |  | $ | 360,998 |
Total debt |  | 360,998 |  |  | 360,998 |
Less: Unamortized debt issuance costs |  | (3,070) |  |  | (4,911) |
Debt, noncurrent |  | $ | 357,928 |  |  | $ | 356,087 |
Weighted-average interest rate |  | 0.76 | % |  | 0.77 | %
Convertible Senior Notes Due 2026 In August 2021, the Company issued 0.25% convertible senior notes due 2026. The Notes were issued pursuant to and are subject to the terms and conditions of an indenture between the Company and Computershare Trust Company, National Association (as successor in interest to Wells Fargo Bank, National Association), as trustee, which is referred to as the Indenture. The Notes were offered and sold in a private offering to qualified institutional buyers pursuant to Rule 144A under the Securities Act of 1933, as amended. In March 2023, the Company entered into separate, privately negotiated repurchase agreements with a limited number of institutional holders of the Notes to effect the Note Repurchases, resulting in the repurchase of $214.0 million aggregate principal amount of the Notes for an aggregate cash payment of $170.8 million. As a result, during the year ended December 31, 2023, the Company recognized a gain on the early extinguishment of debt of $38.9 million, which is net of $3.7 million related to the pro-rata write-off of unamortized issuance costs associated with the sale of the Notes in August 2021, and $0.6 million of other fees incurred to effect the Note Repurchases. The resulting gain on early extinguishment of debt is included in other income, net in the Company’s consolidated statement of operations and comprehensive income (loss). As of each of December 31, 2024 and 2023, $361.0 million aggregate principal amount of the Notes remained outstanding. The Notes are senior, unsecured obligations of the Company and bear interest at a rate of 0.25% per year. Interest will accrue from August 10, 2021 and is payable semiannually in arrears on February 15 and August 15 of each year, beginning on February 15, 2022, and the principal amount of the Notes will not accrete. The Notes will mature on August 15, 2026, unless earlier redeemed, repurchased, or converted in accordance with the terms of the Notes. Holders may convert all or any portion of their Notes, in multiples of $1,000 principal amount at the option of the holder (i) on or after May 15, 2026, at any time until the close of business on the second scheduled trading day immediately preceding the maturity date, and (ii) prior to the close of business on the business day immediately preceding May 15, 2026, only upon satisfaction of certain conditions and during certain periods specified as follows: •during any calendar quarter commencing after the calendar quarter ending on December 31, 2021, if the last reported sale price of the Company’s common stock is greater than or equal to 130% of the conversion price for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter of the conversion price on each applicable trading day; •during the five consecutive business day period after any five consecutive trading day period, which is referred to as the Measurement Period, in which the trading price (as defined in the Indenture) per $1,000 principal amount of Notes for each trading day of the Measurement Period was less than 98% of the product of the last reported sale price per share of the Company’s common stock on such trading day and the conversion rate on such trading day; •if the Company calls such Notes for redemption, at any time prior to the close of business on the second scheduled trading day immediately preceding the redemption date; and •upon the occurrence of specified corporate events described in the Indenture. Upon conversion, the Notes may be settled in shares of the Company’s common stock, cash or a combination of cash and shares of the common stock, at the election of the Company. The Notes have an initial conversion rate of 15.1338 shares of common stock per $1,000 principal amount of Notes, which is subject to adjustment in certain circumstances. This is equivalent to an initial conversion price of approximately $66.08 per share of the Company’s common stock. The conversion rate is subject to customary adjustments under certain circumstances in accordance with the terms of the Indenture. In addition, if certain corporate events that constitute a make-whole fundamental change (as defined in the Indenture) occur or if the Company issues a notice of redemption with respect to the Notes prior to the maturity date, then the conversion rate will, in certain circumstances, be increased for a specified period of time. The Company may redeem for cash all or any portion of the Notes (subject to a partial redemption limitation), at the Company’s option, on or after August 20, 2024, if the last reported sale price per share of the Company’s common stock has been at least 130% of the conversion price then in effect for at least 20 trading days (whether or not consecutive) during any 30 consecutive trading day period (including the last trading day of such period) ending on, and including, the trading day immediately preceding the date on which the Company provides notice of redemption at a redemption price equal to 100% of the principal amount of the Notes to be redeemed, plus any accrued and unpaid interest, if any, to, but excluding, the redemption date. No sinking fund is provided for the Notes, which means that the Company is not required to redeem or retire the Notes periodically. Upon the occurrence of a fundamental change (as defined in the Indenture), subject to certain conditions, holders have the right to require the Company to repurchase for cash all or a portion of their Notes at a price equal to 100% of the principal amount of the Notes to be repurchased, plus any accrued and unpaid interest thereon, if any, until, but excluding, the fundamental change repurchase date. The Notes are the Company’s senior unsecured obligations and rank senior in right of payment to any of the Company’s existing and future indebtedness that is expressly subordinated in right of payment to the Notes; equal in right of payment to any of the Company’s existing and future unsecured indebtedness that is not so subordinated; effectively junior in right of payment to any of the Company’s existing and future secured indebtedness to the extent of the value of the assets securing such indebtedness; and structurally junior to all existing and future indebtedness and other liabilities (including trade payables) of the Company’s subsidiaries. For the year ended December 31, 2024, interest expense was $0.9 million and amortization of the issuance costs was $1.8 million related to the Notes. For the year ended December 31, 2023, interest expense was $1.0 million and amortization of the issuance costs was $2.1 million related to the Notes. As of December 31, 2024 and December 31, 2023, the if-converted value of the Notes did not exceed the outstanding principal amount. As of December 31, 2024 and December 31, 2023, the total estimated fair value of the Notes was $333.5 million and $307.3 million, respectively, and was determined based on a market approach using actual bids and offers of the Notes in an over-the-counter market on the last trading day of the period. The Company considers these assumptions to be Level II inputs in accordance with the fair value hierarchy described in “Note 4—Fair Value Measurements.” Capped Calls In connection with the issuance of the Notes, the Company entered into privately negotiated capped call transactions, which are referred to as the Capped Calls, with various financial institutions. Subject to customary anti-dilution adjustments substantially similar to those applicable to the Notes, the Capped Calls cover the number of shares of the Company’s common stock initially underlying the Notes. By entering into the Capped Calls, the Company expects to reduce the potential dilution to its common stock (or, in the event a conversion of the Notes is settled in cash, to reduce its cash payment obligation) in the event that at the time of conversion of the Notes its common stock price per share exceeds the conversion price of the Notes, with such reduction subject to a cap based on the cap price. If, however, the market price per share of common stock, as measured under the terms of the Capped Calls, exceeds the cap price of the Capped Calls, there would be dilution and/or there would not be an offset of such potential cash payments, in each case, to the extent that the then-market price per share of common stock exceeds the cap price of the Capped Calls. The initial cap price of the Capped Calls is $92.74 per share of common stock, which represents a premium of 100% over the last reported sale price of the common stock of $46.37 per share on August 5, 2021, the date of issuance of the Notes, and is subject to certain customary adjustments under the terms of the Capped Calls; provided that the cap price will not be reduced to an amount less than the strike price of $66.08 per share. The Capped Calls are separate transactions and are not part of the terms of the Notes. The Capped Calls meet the criteria for classification as equity and, as such, are not remeasured each reporting period and are included as a reduction to additional paid-in-capital within stockholders’ equity.

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- Definition The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481544/470-10-50-6 Reference 2: 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