Long-Term Debt

12 Months Ended

Dec. 31, 2022

Debt Disclosure [Abstract]

Long-Term Debt

Long-term Debt

Convertible Senior Notes

In March 2020, the Company issued $230.0 million in aggregate principal amount of 2.625% Convertible Senior Notes due 2025 (“Convertible Notes”) in a private offering. The Convertible Notes are governed by an indenture dated March 9, 2020 between the Company and U.S. Bank, National Association, as trustee.

The Company received net proceeds from the offering of $222.6 million. The Company used $88.6 million to repay in full all outstanding amounts borrowed, accrued interest and fees owed in connection with the termination of the Company’s amended and restated term loan agreement (“2018 Term Loan”) with Capital Royalty Group, and the fees owed in connection with the termination of the Company’s revolving credit facility with Silicon Valley Bank.

The Convertible Notes bear interest at a rate of 2.625% per year, payable semi-annually in arrears on March 1 and September 1, beginning on September 1, 2020. The Convertible Notes may bear additional interest under specified circumstances relating to the Company’s failure to comply with its reporting obligations under, or if the Convertible Notes are not freely tradeable as required by, the indenture governing the Convertible Notes. Upon conversion, the Convertible Notes will be convertible into cash, shares of common stock or a combination of cash and shares of common stock, at the Company’s election.

The Convertible Notes are general unsecured senior obligations and will mature on March 1, 2025, unless earlier repurchased, redeemed or converted, subject to satisfaction of certain conditions and during the periods described below. The initial conversion rate for the Convertible Notes is 20.9161 shares of common stock, par value $0.0001 per share, per $1,000 principal amount of Convertible Notes (which is equivalent to an initial conversion price of approximately $47.81 per share). The conversion rate will be subject to adjustment in some events but will not be adjusted for any accrued and unpaid interest. In addition, following certain corporate events that may occur prior to the maturity date or if the Company issues a notice of redemption, the Company will increase the conversion rate for a holder who elects to convert its Convertible Notes in connection with such corporate event or in connection with such redemption, as the case may be, in certain circumstances.

Prior to the close of business on the business day immediately preceding December 1, 2024, the Convertible Notes will be convertible only under the following circumstances: (1) during any calendar quarter commencing after the calendar quarter ending on June 30, 2020 (and only during such calendar quarter), if the last reported sale price of the common stock 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 is greater than or equal to 130% of the conversion price on each applicable trading day; (2) during the five business-day period after any five consecutive trading-day period in which the trading price per $1,000 principal amount of Convertible Notes for each trading day of such period was less than 98% of the product of the last reported sale price of the common stock and the conversion rate on each such trading day; (3) if the Company calls any or all of the Convertible Notes for redemption, the Convertible Notes called for redemption (or, in the case of a partial redemption, if the Company makes an election to redeem all Convertible Notes, irrespective of whether they are called for redemption, to be convertible, all Convertible Notes) may be submitted for conversion at any time prior to the close of business on the scheduled trading day immediately preceding the redemption date as set forth in the related redemption

notice; or (4) upon the occurrence of specified corporate events. On or after December 1, 2024, until the close of business on the business day immediately preceding the maturity date, holders of the Convertible Notes may convert all or any portion of their Convertible Notes at any time, regardless of the foregoing circumstances.

The Company may not redeem the Convertible Notes prior to March 5, 2023, and no sinking fund is provided for the Convertible Notes. On or after March 5, 2023, the Company may redeem for cash all or any portion of the Convertible Notes, at its option, if the last reported sale price of the 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 a notice of redemption at a redemption price equal to 100% of the principal amount of the Convertible Notes to be redeemed, plus any accrued and unpaid interest to, but excluding, the redemption date.

Upon the occurrence of a fundamental change (as defined in the indenture governing the Convertible Notes) prior to the maturity date, subject to certain conditions, holders may require the Company to repurchase all or a portion of the Convertible Notes in increments of $1,000 for cash at a price equal to 100% of the principal amount of the Convertible Notes to be repurchased, plus any accrued and unpaid interest to, but excluding, the fundamental change repurchase date.

The Convertible Notes do not contain any financial or operating covenants or any restrictions on the issuance of other indebtedness or the issuance or repurchase of securities by the Company. The Convertible Notes indenture contains customary events of default, including that upon certain events of default, 100% of the principal and accrued and unpaid interest on the Convertible Notes will automatically become due and payable. Debt issuance costs are amortized to interest expense using the effective interest method over five years, the contractual term of the Convertible Notes, with an effective interest rate of 3.3%.

The Company monitors the provision of the Convertible Notes that allow for certain conversion rights at each quarterly reporting date in order to determine whether the Convertible Notes are convertible or subject to an event triggering potential redemption during the prescribed measurement periods. As of the date of this report, none of the outstanding convertible notes had been redeemed by the Company. Based on the closing price of our common stock of $7.97 on the last trading day of the year, the if-converted values of the Convertible Notes did not exceed the outstanding principal balance as of December 31, 2022.

All future principal payments related to the Convertible Notes are due in March 2025. The outstanding balance of the Company’s Convertible Notes consisted of the following at December 31 (in thousands):

	2022		2021
Outstanding principal of Convertible Note	$	230,000	$	230,000
Less: unamortized issuance costs	(3,378)		(4,856)
Long-term debt, net	$	226,622	$	225,144

The following table sets forth total interest expense recognized related to the Convertible Notes (in thousands):

	2022		2021		2020
Contractual interest expense	$	6,038	$	6,038	$	4,897
Amortization of issuance costs	1,477		1,429		8,650
Total interest expense	$	7,515	$	7,467	$	13,547

Term Loan Agreement

In October 2018, the Company entered into an amended and restated term loan agreement with Capital Royalty Group (the “2018 Term Loan”), under which it could borrow up to $100.0 million, which was due and payable in September 2024. The Company borrowed a total of $80.0 million under the 2018 Term Loan. In March 2020, the Company terminated the 2018 Term Loan agreement. The Company used $88.6 million of the proceeds from the Convertible Notes to repay in full all outstanding principle, interest and fees associated with termination of the loan. The termination was accounted for as debt extinguishment and the Company recorded a charge of $6.6 million associated with the elimination of previously deferred financing costs, and for fees and penalties incurred upon termination of the 2018 Term Loan and other costs. These costs have been included as a Loss on extinguishment of debt and termination of revolving loan facility in the Company’s consolidated statements of operations.

2018 Revolving Loan Facility

In January 2018, the Company entered into a $15.0 million secured revolving loan facility, with availability subject to a borrowing base consisting of eligible accounts receivable. In November 2018, the Company entered into an amended and restated loan and security agreement to increase the borrowing capacity under the facility to $20.0 million, amend the borrowing base to include finished goods inventory, and extend the final maturity under the facility to November 2021.

In March 2020, the Company terminated the revolving loan facility and paid termination fees of $0.5 million. There were no amounts outstanding under the revolving loan facility at the time of termination. These costs have been included as a Loss on extinguishment of debt and termination of revolving loan facility in the Company’s consolidated statements of operations.

Total interest expense for the Company’s long-term debt was $7.5 million, $7.5 million and $15.4 million for the years ended December 31, 2022, 2021 and 2020, respectively.