Convertible Senior Notes and Capped Call Transactions

12 Months Ended

Dec. 31, 2021

Debt Disclosure [Abstract]

Convertible Senior Notes and Capped Call Transactions

CONVERTIBLE SENIOR NOTES AND CAPPED CALL TRANSACTIONS

On May 11, 2020, the Company issued the 2025 Notes pursuant to an Indenture dated May 11, 2020 (the “Indenture”), between the Company and U.S. Bank National Association, as trustee. The offering consisted of $220,000 aggregate principal amount plus the full exercise of the initial purchasers’ option to purchase up to an additional $33,000 aggregate principal amount. The net proceeds to the Company after the initial purchaser discount and issuance costs were approximately $245,158. The Company used $29,348 of the net proceeds from the offering to pay the cost of the capped call transactions described below.

The 2025 Notes will mature on August 15, 2025, unless earlier converted, redeemed or repurchased. Interest will be payable semi-annually in arrears on February 15 and August 15 of each year, beginning on August 15, 2020, at a rate of 1.25% per year.

The initial conversion rate for the 2025 Notes is 32.5668 shares of the Company’s common stock for each $1,000 principal amount of the 2025 Notes, which is equivalent to an initial conversion price of approximately $30.71 per share. The conversion rate is subject to adjustment in specified events. The 2025 Notes are convertible into shares of the Company’s common stock, at the option of a holder, prior to the close of business on the business day immediately preceding February 15, 2025, under certain conditions.

In addition, on or after February 15, 2025, a holder may convert all or any portion of its 2025 Notes at any time. During the three months ended December 31, 2021, the conversion feature of the 2025 Notes was triggered and therefore the 2025 Notes are currently convertible, in whole or in part, at the option of the holders from January 1, 2022 through March 31, 2022. Whether the 2025 Notes will be convertible following such period will depend on the continued satisfaction of this condition or another conversion condition. The Company has not received any conversion notices through the issuance date of our consolidated financial statements. Since the Company may elect to repay the 2025 Notes in cash, shares of our common stock, or a combination of both, it has continued to classify the 2025 Notes as long-term debt on its consolidated balance sheet as of December 31, 2021.

The 2025 Notes are not redeemable at the Company’s option prior to August 20, 2023. The Company may redeem the 2025 Notes for cash, at its option, subject to the terms and conditions provided in the Indenture.

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 2025 Notes. The Indenture includes customary terms, including certain events of default after which the 2025 Notes may be due and payable immediately.

The Company accounted for the 2025 Notes in accordance with ASC 470-20 "Debt with Conversion and Other Options" and separated the 2025 Notes into liability and equity components. The carrying amounts of the liability components of the 2025 Notes were calculated by measuring the fair value of similar debt instruments that do not have an associated convertible feature. The carrying amounts of the equity components, representing the conversion option, were determined by deducting the fair value of the liability components from the par value of the 2025 Notes. This difference represents the debt discount that is amortized to interest expense over the terms of the 2025 Notes using the effective interest rate method. The carrying amount of the equity components representing the conversion option was approximately $31,779 for the 2025 Notes and is recorded in additional paid-in capital and are not remeasured as long as they continue to meet the conditions for equity classification.

The Company allocates transaction costs related to the issuance of the 2025 Notes to the liability and equity components using the same proportions as the initial carrying value of the Notes. Transaction costs attributable to the liability component were approximately $6,857 and are being amortized to interest expense at an effective interest method rate of 4.51% over the term of the 2025 Notes. Transaction costs attributable to the equity component were approximately $985 and are netted with the equity component of the 2025 Notes in additional paid-in capital.

The net carrying amount of the liability and equity components of the 2025 Notes was as follows (in thousands):

	As of
	December 31, 2021
Liability component
Principal	$	253,000
Unamortized discount	(22,759)
Unamortized issuance costs	(4,911)
Net carrying amount	$	225,330
Equity component, net of discount and issuance costs	$	30,794

The interest expense recognized related to the 2025 Notes for the years ended December 31, 2021 and 2020 was as follows (in thousands):

	December 31, 2021		December 31, 2020
Contractual interest expense	$	3,162	$	2,012
Amortization of debt discount	5,651		3,369
Amortization of debt issuance costs	1,219		727
Total	$	10,032	$	6,108

As of December 31, 2021, the total estimated fair value of the 2025 Notes was approximately $436,425. The fair value was determined based on the closing trading price per $100 of the 2025 Notes as of the last day of trading for the period. The fair value of the 2025 Notes is primarily affected by the trading price of our common stock and market interest rates. The fair value of the 2025 Notes is considered a Level 2 within the fair value hierarchy and was determined based on inputs that are observable in the market or that could be derived from, or corroborated with, observable market data, quoted price of the 2025 Notes in an over-the-counter market.

Capped Call Transactions

In May 2020, in connection with the pricing of the 2025 Notes, the Company entered into privately negotiated capped call transactions (the “Capped Call Transactions”). The Capped Call Transactions are generally expected to reduce the

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 2025 Notes, as the case may be, with such reduction and/or offset subject to a cap initially equal to $47.24 (the "Cap Price").

The Capped Call Transactions are separate transactions, and are not part of the terms of the 2025 Notes and will not change the holders’ rights under the 2025 Notes. As the Capped Call Transactions are considered indexed to the Company's stock and are considered equity classified, they are recorded in stockholders’ equity on the consolidated balance sheet and are not accounted for as derivatives. The cost of the Capped Call Transactions was approximately $29,348 and was recorded as a reduction to additional paid-in capital.