Debt

3 Months Ended

Mar. 31, 2025

Debt Disclosure [Abstract]

Debt

Debt

Credit Agreement

On December 13, 2024, the Company entered into a credit agreement (the “Credit Agreement”) with GLAS USA LLC, as administrative agent, and Athyrium Opportunities IV Co-Invest 1 LP, HCR Stafford Fund II, L.P., HCR Potomac Fund II, L.P. and HCRX Investments HoldCo, L.P., as the initial lenders party thereto. The Credit Agreement provides for a $150.0 million term loan (the “Loan”), which was borrowed in full at closing. Proceeds from the Loan were used to repay a portion of the outstanding obligations under the Company’s existing $265.0 million aggregate principal amount 4.00% Convertible Senior Subordinated Notes due November 2025 (the “2025 Notes”) and to pay fees and expenses in connection with the Credit Agreement.

The Loan will bear interest at an annual rate of 9.75% if paid in cash, and 11.75% if paid-in-kind. At the Company’s option, interest on the Loan may be paid-in-kind for the first four full fiscal quarters ending after the closing date. The Credit Agreement requires quarterly interest-only payments for the first four years after the closing date and, thereafter, the Loan will partially amortize in quarterly principal payments of 12.50%, with the outstanding balance to be repaid on the maturity date, which shall be five (5) years after the closing date (the “Maturity Date”); provided that, such amortization may be adjusted pursuant to the terms of the Credit agreement. The Company may, at its option, prepay the Loan in whole or in part at any time, subject to concurrent payment of certain fees and, if prepaid (a) within the first two years after closing, a make-whole premium plus 3%, (b) after the second anniversary of closing and on or prior to the third anniversary, a prepayment premium of 3% and (c) after the third anniversary of closing and on or prior to the fourth anniversary, a prepayment premium of 1% (the “Prepayment Premium”). The Loan is subject to mandatory prepayment in the event of specified asset dispositions, extraordinary receipts, unpermitted debt issuances, change of control, and, in certain circumstances, failure to settle the exchanges of the Company’s Existing Notes, subject to certain exceptions and thresholds and concurrent payment of certain fees and, if prepaid within the first four years of closing, the applicable Prepayment Premium.

All obligations under the Credit Agreement shall be guaranteed by the Company’s present and future wholly owned subsidiaries, subject to customary exceptions, and secured by assets of Company and the guarantors, including the equity interests in the Company’s subsidiaries, subject to customary exceptions. The Credit Agreement contains a financial covenant to maintain minimum liquidity of $50 million. The Credit Agreement contains affirmative and negative covenants customary for a senior secured loan. The negative covenants under the Credit Agreement limit the ability of the Company and its subsidiaries to, among other things, dispose of assets, engage in mergers, acquisitions, and similar transactions, incur additional indebtedness, grant liens, make investments, pay dividends or make distributions or certain other restricted payments in respect of equity, prepay other indebtedness, enter into restrictive agreements, undertake fundamental changes or amend certain material contracts, in each case subject to certain exceptions.

The Credit Agreement also contains certain customary events of default, including, but not limited to, a failure to comply with the covenants in the Credit Agreement. If an event of default has occurred and continues beyond any applicable cure period, the administrative agent or the required lenders may accelerate all outstanding obligations under the Credit Agreement and/or exercise any other remedies provided under the loan documents.

In connection with the borrowing of the Loan, the Company incurred 2.5% of original issue discount ("OID"), or approximately $3.8 million. In addition, the Company incurred debt issuance costs of $5.4 million in connection with the borrowing of the Loan. Both the OID and debt issuance costs were capitalized and included in long-term debt on the condensed balance sheets at the inception of the Loan, and are being amortized to interest expense using the effective interest method over the same term. As of March 31, 2025, the Company recognized $141.4 million of long-term debt related to the Credit Agreement on the condensed balance sheets, net of the remaining unamortized discount and debt issuance costs associated with the Loan of $3.5 million and approximately $5.1 million, respectively. During the three months ended March 31, 2025, the Company recognized $4.1 million of interest expense, including $0.5 million of OID and debt issuance costs amortization.

2025 Notes

In November 2020, the Company issued $280.0 million aggregate principal amount of 4.0% senior subordinated convertible notes due November 2025. The net proceeds the Company received from the offering was approximately $271.1 million, after deducting the initial purchasers’ discounts and commissions and offering expenses payable by the Company (the “2025 Notes”). The Company used approximately $46.0 million of the net proceeds from the offering of the notes to pay the cost of the Capped Call (as defined below) and $55.0 million of the net proceeds from the offering of the initial notes to finance the Prepaid Forward (as defined below). The 2025 Notes are the Company's senior unsecured obligations and mature on November 15, 2025 (the “Maturity Date”), unless earlier repurchased or converted into shares of the Company's common stock, par value $0.001 per share ("common stock"), under certain circumstances described below. The 2025 Notes are convertible into shares of the Company’s common stock, can be repurchased for cash, or a combination thereof, at the Company’s election, at an initial conversion rate of 30.2151 shares of common stock per $1,000 principal amount of the 2025 Notes, which is equivalent to an initial conversion price of approximately $33.096 per share of common stock, subject to adjustment. The Company will pay interest on the 2025 Notes semi-annually in arrears on May 15 and November 15 of each year.

Holders may convert their 2025 Notes at their option at any time prior to the close of business on the business day immediately preceding August 15, 2025 in the following circumstances: (1) during any calendar quarter commencing after the calendar quarter ending on March 31, 2021 (and only during such calendar quarter), if the last reported sale price per share of the Company’s common stock, is greater than or equal to 130% of the conversion price for each of at least 20 trading days, whether or not consecutive, during the 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter; (2) during the five business days after any five consecutive trading day period (such five consecutive trading day period, the “measurement period”) in which the trading price 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 and the conversion rate for the notes on each such trading day; (3) if the Company calls such notes for redemption, any such notes that have been called for redemption may be converted at any time prior to the close of business on the second scheduled trading day immediately preceding the redemption date, but only with respect to the notes called for redemption; and (4) upon the occurrence of specified corporate events, as provided in the Indenture. On or after August 15, 2025, to the close of business on the second scheduled trading day immediately before the maturity date, holders may convert all or any portion of their notes at the applicable conversion rate at any time at the option of the holder regardless of the foregoing conditions.

In addition, following certain corporate events or following issuance of a notice of redemption, the Company will, in certain circumstances, increase the conversion rate for a holder who elects to convert its notes in connection with such a

corporate event or to convert its notes called (or deemed called) for redemption during the related redemption period, as the case may be.

The 2025 Notes will be redeemable, in whole or in part, at the Company’s option at any time, and from time to time, on or after November 20, 2023 and before the 41st scheduled trading day immediately before the maturity date, at a cash redemption price equal to 100% of the principal amount of the notes to be redeemed, plus accrued and unpaid interest, if any, but only 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), including the trading day immediately preceding the date the Company sends the related redemption notice, during any 30 consecutive trading day period ending on, and including, the trading day immediately preceding the date on which the Company sends such redemption notice. No sinking fund is provided for the notes. If the Company redeems less than all the outstanding notes, at least $125.0 million aggregate principal amount of notes must be outstanding and not subject to redemption as of the relevant redemption notice date.

If the Company undergoes a “fundamental change” (as defined in the Indenture), holders may require the Company to repurchase their notes for cash all or any portion of their notes at a fundamental change repurchase price equal to 100% of the principal amount of the notes to be repurchased, plus accrued and unpaid interest, to, but excluding, the fundamental change repurchase date. The Indenture includes customary terms and covenants, including certain events of default.

On October 22, 2021, the Company entered into a privately negotiated exchange agreement (the “2021 Exchange Agreement”) with two co-managed holders (the “Holders”) of its 2025 Notes. Under the terms of the 2021 Exchange Agreement the Holders agreed to exchange (the “2021 Exchange”) with the Company $15.0 million aggregate principal amount of the Convertible Notes held in the aggregate by them (and accrued interest thereon) for shares of the Company’s common stock. Pursuant to the 2021 Exchange Agreement, the number of shares of common stock to be issued by the Company to the Holders upon consummation of the 2021 Exchange was determined based upon the volume-weighted-average-price per share of common stock, subject to a floor of $5.62 per share, during the five trading-day averaging period, commencing on the trading day immediately following the date of the 2021 Exchange Agreement. The 2021 Exchange closed on November 3, 2021 with 1,094,848 shares of the Company's common stock being exchanged.

On December 12, 2024, the Company entered into privately negotiated exchange and subscription agreements with certain holders of its 4.00% Convertible Senior Subordinated Notes due 2025 (the “2025 Notes”) pursuant to which the Company issued $100.0 million aggregate principal amount of 5.75% Convertible Senior Subordinated Notes due in June 2030 (the “2030 Notes”) consisting of (a) approximately $57.5 million principal amount of 2030 Notes, along with approximately $153.4 million in cash, including accrued interest, issued in exchange for approximately $210.1 million principal amount of 2025 Notes (the “Exchange Transaction”). The Company also issued and sold approximately $42.5 million aggregate principal amount of 2030 Notes for cash, pursuant to privately negotiated agreements (the “Subscription Transactions” and, together with the Exchange Transaction, the “Transaction”). The Exchange Transaction closed on December 17, 2024 under an Indenture between the Company and U.S. Bank Trust Company, National Association, as trustee. In exchange for issuing the 2030 Notes pursuant to the Exchange Transaction, the Company received and cancelled the exchanged 2025 Notes.

The Company accounted for the Exchange as an extinguishment of a liability and calculated the loss on extinguishment of debt under ASC 470-50-40, which requires the difference between the reacquisition price of the debt and the net carrying amount of the extinguished debt to be recognized in the income statement. The reacquisition price of the 2025 Notes was the amount of principal exchanged. The net carrying amount of the debt was calculated by the face value of the notes less the unamortized debt issuance costs associated with the face value of the notes. The Company recognized a loss of $1.7 million in "Loss on extinguishment of debt and exchange transaction" on the statements of operations and comprehensive loss during the year ended December 31, 2024.

As of March 31, 2025, the principal amount of 2025 notes was $54.9 million, and the unamortized debt issuance costs were $0.2 million, for a net carrying amount of $54.7 million. As of December 31, 2024, the principal amount of 2025 notes was $54.9 million, and the unamortized debt discount and issuance costs were $0.3 million, for a net carrying amount of $54.6 million.

The Company recorded $0.6 million and $3.1 million of interest expense during the three months ended March 31, 2025 and 2024, respectively, relating to the cash interest on the 2025 notes due semi-annually and including the amortization of the debt issuance costs of $0.1 million and $0.4 million, respectively.

As of March 31, 2025, no 2025 Notes were convertible pursuant to their terms. The estimated fair value of the 2025 Notes was $54.0 million as of March 31, 2025 and $53.2 million as of December 31, 2024. The estimated fair value of the 2025 Notes

was determined through consideration of quoted market prices. As of March 31, 2025, the if-converted value of the 2025 Notes did not exceed the principal value of those notes.

2030 Notes

As noted above, the Company issued $100 million aggregate principal amount of 5.75% Convertible Senior Subordinated Notes due 2030 (the “2030 Notes”) on December 17, 2024. The Company incurred approximately $3.3 million of issuance costs associated with the 2030 Notes.

The 2030 Notes mature on June 15, 2030, unless earlier converted, redeemed or repurchased. The 2030 Notes are the Company’s senior unsecured obligations and will pay interest on the 2030 Notes at an annual rate of 5.75% payable in cash semiannually in arrears on June 15 and December 15 of each year, beginning June 15, 2025. Before March 15, 2030, holders of the 2030 Notes will have the right to convert their notes only upon the occurrence of certain events. From and after March 15, 2030, holders may convert their notes at any time at their election until the close of business on the second scheduled trading day immediately before the maturity date. The Company will have the right to elect to settle conversions by paying or delivering, as applicable, cash, shares of its common stock or a combination of cash and shares of its common stock. The initial conversion rate is 326.7974 shares of common stock per $1,000 principal amount of notes, which represents an initial conversion price of approximately $3.06 per share of common stock. The conversion rate and conversion price will be subject to adjustment upon the occurrence of certain events. The indenture governing the 2030 Notes includes certain restrictive covenants that limits the Company’s ability to incur additional indebtedness, subject to certain exceptions.

The 2030 Notes will be redeemable, in whole or in part, for cash at the Company’s option at any time, and from time to time, on or after December 20, 2027 and prior to the forty-first (41st) scheduled trading day immediately before the maturity date, but only if the last reported sale price per share exceeds 130% of the conversion price for a specified period of time and certain other conditions are satisfied. The redemption price will be equal to the principal amount of the 2030 Notes to be redeemed, plus accrued and unpaid interest, if any, to, but excluding, the redemption date.

In addition, if the Company undergoes a “fundamental change” (as defined in the Indenture), subject to certain conditions, holders may require the Company to repurchase for cash all or part of their 2030 Notes in principal amounts of $1,000 or an integral multiple thereof. The repurchase price will be equal to the principal amount of the 2030 Notes to be repurchased, plus accrued and unpaid interest, if any, to, but excluding, the applicable repurchase date.

The Indenture provides for customary events of default, including payment defaults, breaches of covenants, failure to pay certain judgments and certain events of bankruptcy, insolvency and reorganization. If an event of default occurs and is continuing, the principal amount of the 2030 Notes, plus accrued and unpaid interest, if any, may be declared immediately due and payable, subject to certain conditions set forth in the Indenture. These amounts automatically become due and payable if an event of default relating to certain events of bankruptcy, insolvency or reorganization occurs.

As of March 31, 2025, the principal amount of 2030 notes was $100.0 million, and the unamortized debt issuance costs were $3.1 million, for a net carrying amount of $96.9 million. As of December 31, 2024, the principal amount of 2030 notes was $100.0 million, and the unamortized debt issuance costs were $3.3 million, for a net carrying amount of $96.7 million.

The Company recorded $1.6 million of interest expense during the three months ended March 31, 2025 relating to the cash interest on the 2030 notes due semi-annually and including amortization of the debt issuance costs of $0.1 million.

As of March 31, 2025, no 2030 Notes were convertible pursuant to their terms. The estimated fair value of the 2030 Notes was $90.3 million as of March 31, 2025 and $105.4 million as of December 31, 2024. The estimated fair value of the 2030 Notes was determined through consideration of quoted market prices. As of March 31, 2025, the if-converted value of the 2030 Notes did not exceed the principal value of those notes.

The Company is in compliance with all of its covenants at March 31, 2025.

Estimated future principal payments due under the Loan, 2025 Notes and 2030 Notes are as follows:

Years Ending December 31,	(in thousands)
2025	$	54,912
2026	—
2027	—
2028	18,750
2029	131,250
2030	100,000
Total	$	304,912

Capped Call Transactions

In connection with the offering of the 2025 Notes, the Company entered into privately-negotiated capped call transactions with one of the initial purchasers of the convertible notes or its affiliate and certain other financial institutions. The Company used approximately $46.0 million of the net proceeds from the offering of the 2025 Notes to pay the cost of the capped call transactions. The capped call transactions are expected generally to reduce potential dilution to the Company’s common stock upon any conversion of the 2025 Notes and/or offset any cash payments the Company is required to make in excess of the principal amount of converted notes, as the case may be, in the event that the market value per share of the Company’s common stock, as measured under the terms of the capped call transactions at the time of exercise, is greater than the strike price of the capped call transactions (which initially corresponds to the initial conversion price of the 2025 Notes, and is subject to certain adjustments), with such reduction and/or offset subject to a cap initially equal to approximately $55.16 (which represents a premium of approximately 100% over the last reported sale price of the Company’s common stock on November 11, 2020), subject to certain adjustments. The capped call transactions are separate transactions, entered into by the Company and are not part of the terms of the 2025 Notes.

Given that the transactions meet certain accounting criteria, the convertible note capped call transactions are recorded in stockholders’ deficit, and they are not accounted for as derivatives and are not remeasured each reporting period. As of March 31, 2025, the Company had not purchased any shares under the convertible note capped call transactions.

Prepaid Forward

In connection with the offering of the 2025 Notes, the Company entered into a prepaid forward stock repurchase transaction (“Prepaid Forward”) with a financial institution (“Forward Counterparty”). Pursuant to the Prepaid Forward, the Company used approximately $55.0 million of the net proceeds from the offering of the 2025 Notes to fund the Prepaid Forward. The aggregate number of shares of the Company’s common stock underlying the Prepaid Forward was approximately 1,994,198. The expiration date for the Prepaid Forward is November 15, 2025, although it may be settled earlier in whole or in part. Upon settlement of the Prepaid Forward, at expiration or upon any early settlement, the Forward Counterparty will deliver to the Company the number of shares of common stock underlying the Prepaid Forward or the portion thereof being settled early. The shares purchased under the Prepaid Forward are treated as treasury stock and not outstanding for purposes of the calculation of basic and diluted earnings per share, but will remain outstanding for corporate law purposes, including for purposes of any future stockholders’ votes, until the Forward Counterparty delivers the shares underlying the Prepaid Forward to the Company. As of March 31, 2025, 505,148 shares had been delivered to the Company. The Company’s Prepaid Forward hedge transaction exposes the Company to credit risk to the extent that its counterparty may be unable to meet the terms of the transaction. The Company mitigates this risk by limiting its counterparty to a major financial institution.