Convertible Notes and Loan Agreement

3 Months Ended

Mar. 31, 2023

Debt Disclosure [Abstract]

Convertible Notes and Loan Agreement

8. Convertible Notes and Loan Agreement

Convertible Notes

In December 2020, the Company issued $201.3 million in aggregate principal amount of 0.125% convertible senior notes due December 15, 2025 (the “2025 Notes”) and in December 2021, the Company issued $414 million in aggregate principal amount of 0.0% convertible senior notes due December 15, 2026 (the “2026 Notes”). At the time of the issuance of the 2026 Notes, a portion of the outstanding 2025 Notes were exchanged for shares of common stock and cash. As of March 31, 2023, approximately $51 million aggregate principal amount of the 2025 Notes remain outstanding. Further details are included below:

Issuance	Maturity Date	Interest Rate	First Interest Payment Date	Effective Interest Rate	Semi-Annual Interest Payment Dates	Initial Conversion Rate per $1,000 Principal	Initial Conversion Price		Number of Shares (in millions)
2025 Notes	December 15, 2025	0.125%	June 15, 2021	0.8%	June 15, and December 15	14.1977	$	70.43	1.0
2026 Notes	December 15, 2026	0.0%	––	0.0%	––	7.6043	$	131.50	4.3

Each of the 2025 Notes and the 2026 Notes (collectively, the “Notes”) is governed by an indenture between the Company, as issuer, and U.S. Bank, National Association, as trustee (together the “Indentures”, and each such indenture, an “Indenture”). The Notes are unsecured and rank senior in right of payment to the Company’s future indebtedness that is expressly subordinated in right of payment to the Notes and equal in right of payment to the Company’s unsecured indebtedness that is not so subordinated.

Upon conversion, the Company will pay or deliver, as the case may be, cash, shares of the Company’s common stock or a combination of cash and shares of common stock, at the Company’s election.

Terms of the Notes

Prior to the close of business on September 15, 2025 and September 14, 2026, the 2025 Notes and 2026 Notes, respectively, will be convertible at the option of holders during certain periods, only upon satisfaction of certain conditions set forth below. On or after September 15, 2025 (for the 2025 Notes) and September 14, 2026 (for the 2026 Notes), until the close of business on the second scheduled trading day immediately preceding the applicable maturity date, holders may convert all or any portion of their Notes at the applicable conversion price at any time regardless of whether the conditions set forth below have been met.

Holders may convert all or a portion of their Notes prior to the close of business on the day immediately preceding their respective free convertibility date described above, in multiples of the $1,000 principal amount, only under the following circumstances:

•during any calendar quarter commencing after the calendar quarter ending on March 31, 2021 for the 2025 Notes and March 31, 2022 for the 2026 Notes (and only during such calendar quarter), if the last reported sales 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 applicable conversion price on each applicable trading day;

•during the five business day period after any five consecutive trading day period, or the Notes measurement period, in which the “trading price” (as defined in each Indenture) per $1,000 principal amount of Notes for each trading day of the Notes measurement period was less than 98% of the product of the last reported sale price of the Company’s common stock and the conversion rate on each such trading day;

•if the Company calls any or all of the Notes for redemption, at any time prior to the close of business on September 14, 2025 for the 2025 Notes or September 14, 2026 for the 2026 Notes; or

•upon the occurrence of specified corporate events as set forth in the Indentures.

As of March 31, 2023, the 2026 Notes and 2025 Notes are not convertible.

Whether the 2026 Notes or the 2025 Notes will be convertible in the future prior to the applicable free convertibility date will depend on the satisfaction of the trading price condition or another conversion condition specified in the Indentures. Since the Company may elect to repay the 2026 Notes and the 2025 Notes in cash, shares of our common stock, or a combination of both, the Company has continued to classify the 2026 and the 2025 Notes as long-term debt on its consolidated balance sheet as of March 31, 2023.

The Notes consist of the following:

	March 31, 2023				December 31, 2022
Liability Component:	2026 Notes		2025 Notes		2026 Notes		2025 Notes
Principal	$	414,000	$	51,381	$	414,000	$	51,381
Less: unamortized debt issuance costs		8,131		929		8,673		1,014
Net carrying amount	$	405,869	$	50,452	$	405,327	$	50,367

The following table sets forth total interest expense recognized related to the Notes:

	March 31, 2023		March 31, 2022
0.125% Coupon	$	16	$	16
Amortization of debt discount and transaction costs		627		624
	$	643	$	640

The fair value of the Notes, which was determined based on inputs that are observable in the market or that could be derived from, or corroborated with, observable market data, quoted prices of the Notes in an over-the-counter market (Level 2), and carrying value of debt instruments (carrying value excludes the equity component of the Company’s convertible notes classified in equity) were as follows:

	March 31, 2023				December 31, 2022
	Fair Value		Carrying Value		Fair Value		Carrying Value
Convertible senior notes	$	367,181	$	456,321	$	361,658	$	455,694

2021 Loan Agreement

On October 29, 2021, the Company entered into a Loan and Security Agreement with Western Alliance Bank, as administrative agent and collateral agent for the lenders, and the banks and other financial institutions or entities from time to time party thereto as lenders (the “2021 Loan Agreement”). The 2021 Loan Agreement provides for a $75 million revolving credit facility with a $5 million letter-of-credit sublimit and matures on October 29, 2023. The 2021 Loan Agreement is secured by substantially all of the Company’s assets. Borrowings under the 2021 Loan Agreement bear interest at a rate equal to one (1) month U.S. LIBOR, plus a spread based upon the Company’s leverage (as defined by 2021 Loan Agreement), which may vary between 2.00% and 2.75%. As of March 31, 2023, the interest rate was 7.42%. The 2021 Loan Agreement is subject to various leverage and non-financial covenants. No amounts were outstanding under the 2021 Loan Agreement as of March 31, 2023.