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Convertible Notes
 3 Months Ended
Mar. 31, 2022
Debt Disclosure [Abstract]  
Convertible Notes Convertible Notes
1.375% Convertible Senior Notes due 2023. On March 2, 2022, the Company entered into individual, privately negotiated transactions with certain holders of its outstanding 2023 Notes, pursuant to which the Company paid an aggregate of approximately $199.1 million in cash for the repurchase of approximately $123.1 million aggregate principal amount of its 2023 Notes (“2023 Notes Partial Repurchase”). The cash consideration was based on a volume-weighted average price of $29.6789 for the 19-trading day measurement period ending March 29, 2022. Of the $123.1 million aggregate principal amount, approximately $107.9 million was settled on March 31, 2022 for $174.5 million in cash. The remaining $15.2 million aggregate principal amount was settled on April 1, 2022 for $24.6 million in cash and included in short-term convertible debt on the accompanying unaudited condensed consolidated balance sheet as of March 31, 2022. In addition, this transaction resulted in a loss on extinguishment of debt of $66.5 million and loss on fair value adjustment of derivatives, net of $8.3 million.
Upon entering into the 2023 Notes Partial Repurchase agreements, the conversion feature related to the 2023 Notes repurchased, as well as the settlements of the convertible senior note hedges and warrants, were subject to derivative accounting. This resulted in a $8.3 million loss on fair value adjustment of derivatives, net, for the three months ended March 31, 2022.
The remaining outstanding 2023 Notes were convertible at the option of the holders during the three months ended March 31, 2022 and continue to be convertible through the second quarter of 2022 since the trigger for early conversion was met. Specifically, the last reported sale price of the Company’s common stock exceeded 130% of the conversion price of the 2023 Notes for more than 20 trading days during the 30 consecutive trading days ended March 31, 2022. During the three
months ended March 31, 2022, no holders elected to convert their 2023 Notes which had met the trigger for early conversion as of December 31, 2021.
The Company’s convertible notes are shown in the following table:
As of
(In thousands)March 31, 2022December 31, 2021
2023 Notes (1)
$74,011 $172,500 
Unamortized discount — 2023 Notes (2)
— (8,266)
Unamortized debt issuance costs — 2023 Notes(151)(547)
Total convertible notes73,860 163,687 
Less current portion73,860 163,687 
Total long-term convertible notes$— $— 
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(1)    As of March 31, 2022, the $74.0 million balance consisted of $49.4 million aggregate principal amount of 2023 Notes, as well as the carrying value and related conversion premium, totaling $24.6 million, of the remaining 2023 Notes Partial Repurchase.
(2)    On January 1, 2022, the Company adopted ASU No. 2020-06, “Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity's Own Equity (Subtopic 815-40).” Refer to Note 2, “Recent Accounting Pronouncements,” for additional information.
Interest expense related to the convertible notes for the three months ended March 31, 2022 and 2021 was as follows:
Three Months Ended
 March 31,
(In thousands)20222021
2023 Notes coupon interest at a rate of 1.375%$316 $593 
2023 Notes amortization of discount and debt issuance cost105 1,874 
Total interest expense on convertible notes$421 $2,467 
Note Hedges and Warrants. In connection with the 2023 Notes Partial Repurchase, the Company entered into agreements with certain financial institutions to retire the corresponding portions of convertible senior note hedges and warrants the Company had previously entered into with the counterparties in connection with the issuance of the 2023 Notes. Upon settlement, the Company received $72.4 million in cash for the retirement of the proportionate amount of convertible senior note hedges and paid $55.1 million in cash for the retirement of the proportionate amount of warrants during the three months ended March 31, 2022.