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CONVERTIBLE SENIOR NOTES | 9 Months Ended
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Sep. 30, 2023
Debt Disclosure [Abstract] |
CONVERTIBLE SENIOR NOTES | CONVERTIBLE SENIOR NOTES 2030 Convertible Senior Notes In June 2023, we entered into a privately negotiated exchange agreement with a holder of our outstanding 1.50% Convertible Senior Notes due 2028 (the “2028 Notes”), pursuant to which we issued $441.0 million in aggregate principal amount of our 1.375% Convertible Senior Notes due 2030 (the “2030 Notes”) in exchange for $441.0 million principal amount of the 2028 Notes (the “Exchange Transaction”), pursuant to exemptions from registration under the Securities Act of 1933, as amended, and the rules and regulations thereunder. The 2030 Notes were issued on June 30, 2023. The 2030 Notes are governed by an indenture (the “2030 Indenture”) between the Company and U.S. Bank Trust Company, National Association, as trustee. The 2030 Notes bear interest at a rate of 1.375% per annum. Interest on the 2030 Notes is payable semi-annually in arrears on June 15 and December 15, commencing on December 15, 2023. The 2030 Notes will mature on December 15, 2030, subject to earlier conversion, redemption or repurchase. The 2030 Notes are convertible at the option of the holder at any time until the second scheduled trading day prior to the maturity date, including in connection with a redemption by the Company. The 2030 Notes are convertible into shares of our common stock based on an initial conversion rate of 46.5116 shares of common stock per $1,000 principal amount of the 2030 Notes (which is equal to an initial conversion price of $21.50 per share of common stock), in each case subject to customary anti-dilution and other adjustments as a result of certain extraordinary transactions. Upon conversion of the 2030 Notes, we may elect to settle such conversion obligation in shares of our common stock, cash or a combination of shares of our common stock and cash. On or after June 20, 2028, the 2030 Notes will be redeemable by the Company in the event that the closing sale price of our common stock has been at least 150% 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 we provide the redemption notice at a redemption price of 100% of the principal amount of such 2030 Notes, plus accrued and unpaid interest up to, but excluding, the redemption date. Upon the occurrence of a Fundamental Change (as defined in the 2030 Indenture), the holders of the 2030 Notes may require that we repurchase all or part of the principal amount of the 2030 Notes at a purchase price equal to 100% of the principal amount of the notes to be repurchased, plus any accrued and unpaid interest up to, but excluding, the fundamental change repurchase date, and all unpaid interest from the fundamental change repurchase date thereon, but excluding, the maturity date. The 2030 Indenture includes customary “events of default,” which may result in the acceleration of the maturity of the 2030 Notes under the 2030 Indenture. The 2030 Indenture also includes customary covenants for convertible notes of this type. To the extent we elect, the sole remedy for an event of default relating to our failure to comply with certain of our reporting obligations shall, for the first 360 calendar days after the occurrence of such an event of default, consist exclusively of the right to receive additional interest on the 2030 Notes at a rate equal to (i) 0.25% per annum of the principal amount of the 2030 Notes outstanding for each day during the first 180 calendar days of the 360-day period after the occurrence of such an event of default during which such event of default is continuing (or, if earlier, the date on which such event of default is cured or waived) and (ii) 0.50% per annum of the principal amount of the 2030 Notes outstanding for each day from, and including, the 181st calendar day to, and including, the 360th calendar day after the occurrence of such an event of default during which such event of default is continuing (or, if earlier, the date on which such event of default is cured or waived as provided for in the 2030 Indenture). On the 361st day after such event of default (if the event of default relating to our failure to comply with its obligations is not cured or waived prior to such 361st day), the 2030 Notes shall be subject to acceleration as provided for in the 2030 Indenture. The 2030 Notes are accounted for in accordance with the authoritative guidance for convertible debt instruments that may be settled in cash upon conversion. Under ASU 2020-06, the guidance requires that debt with an embedded conversion feature is accounted for in its entirety as a liability and no portion of the proceeds from the issuance of the convertible debt instrument is accounted for as attributable to the conversion feature unless the conversion feature is required to be accounted for separately as an embedded derivative or the conversion feature results in a substantial premium. The conversion feature of the 2030 Notes is not accounted for as an embedded derivative because it is considered to be indexed to our common stock, and the 2030 Notes were not issued at a substantial premium; therefore, the 2030 Notes are accounted for in their entirety as a liability. Because we may elect to settle any conversions entirely in shares, and because settlement in shares is the default settlement method, the liability is classified as non-current. The requirement to repurchase the 2030 Notes, including unpaid interest to the maturity date in the event of a Fundamental Change, is considered a put option for certain periods requiring bifurcation under ASC 815 – Derivatives and Hedging. However, given the low probability of such a Fundamental Change occurring during the applicable periods, the value of the embedded derivative is immaterial. The additional interest feature in the event of our failure to comply with certain reporting obligations is also considered an embedded derivative requiring bifurcation under ASC 815. However, due to the nature and terms of the reporting obligations, the value of the embedded derivative is immaterial. The Exchange Transaction was accounted for as an extinguishment driven by the change in fair value of the embedded conversion option. We recorded a loss on extinguishment of debt of approximately $2.0 million in connection with the Exchange Transaction during the nine months ended September 30, 2023, which represents the difference between the fair value and the principal amount of the 2030 Notes of the debt at the modification date, plus unamortized debt issuance costs of $1.5 million related to the respective portion of the 2028 Notes. We incurred issuance costs related to the 2030 Notes of approximately $7.3 million, which were recorded as debt issuance costs and are presented as a reduction to the 2030 Notes on our Consolidated Balance Sheets and are amortized to interest expense using the effective interest method over the term of the 2030 Notes, resulting in an effective interest rate of 1.6%. We also paid accrued but unpaid interest of $2.5 million on the 2028 Notes in connection with the Exchange Transaction on June 30, 2023. We did not receive any cash proceeds from the Exchange Transaction. In exchange for issuing the 2030 Notes pursuant to the Exchange Transaction, we received and cancelled the exchanged 2028 Notes. Following the closing of the Exchange Transaction, $459.0 million in aggregate principal amount of 2028 Notes remained outstanding with terms unchanged. The net carrying amount of the liability for the 2030 Notes is included as convertible senior notes, net, non-current in the Condensed Consolidated Balance Sheets as follows (in thousands):
| September 30, 2023 |  | December 31, 2022
Principal amount | $ | 441,000 |  |  | $ | — |
Unamortized debt premium | 542 |  |  | — |
Unamortized debt issuance costs | (7,093) |  |  | — |
Net carrying amount | $ | 434,449 |  |  | $ | — |
For the three and nine months ended September 30, 2023 and 2022, interest expense for the 2030 Notes was as follows (in thousands):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2023 |  | 2022 |  | 2023 |  | 2022
Contractual interest expense | $ | 1,516 |  |  | $ | — |  |  | $ | 1,516 |  |  | $ | — |
Amortization of debt issuance costs | 229 |  |  | — |  |  | 229 |  |  | — |
Total interest expense | $ | 1,745 |  |  | $ | — |  |  | $ | 1,745 |  |  | $ | — |
As of September 30, 2023, the estimated fair value (Level 2) of the 2030 Notes was $356.6 million. The fair value of the 2030 Notes is estimated using a binomial lattice model that is primarily affected by the trading price of our common stock, market interest rates and volatility. 2028 Convertible Senior Notes On February 9, 2021, we entered into an investment agreement (the “Investment Agreement”) with SB Northstar LP (the “Purchaser”), a subsidiary of SoftBank Group Corp., relating to the issuance and sale to the Purchaser of $900.0 million in aggregate principal amount of the 2028 Notes. The 2028 Notes were issued on February 16, 2021. As discussed above, in June 2023 we completed an exchange of $441.0 million in aggregate principal amount of our 2028 Notes for $441.0 million aggregate principal amount of the 2030 Notes, leaving approximately $459.0 million in aggregate principal amount of 2028 Notes outstanding. The 2028 Notes are governed by an indenture (the “2028 Indenture”) between the Company and U.S. Bank National Association, as trustee. The 2028 Notes bear interest at a rate of 1.50% per annum. Interest on the 2028 Notes is payable semi-annually in arrears on February 15 and August 15 and commenced on August 15, 2021. The 2028 Notes will mature on February 15, 2028, subject to earlier conversion, redemption or repurchase. The 2028 Notes are convertible at the option of the holder at any time until the second scheduled trading day prior to the maturity date, including in connection with a redemption by the Company. The 2028 Notes are convertible into shares of our common stock based on an initial conversion rate of 22.9885 shares of common stock per $1,000 principal amount of the 2028 Notes (which is equal to an initial conversion price of $43.50 per share of common stock), in each case subject to customary anti-dilution and other adjustments as a result of certain extraordinary transactions. Upon conversion of the 2028 Notes, we may elect to settle such conversion obligation in shares of our common stock, cash or a combination of shares of our common stock and cash. On or after February 20, 2026, the 2028 Notes will be redeemable by the Company in the event that the closing sale price of our common stock has been at least 150% 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 we provide the redemption notice at a redemption price of 100% of the principal amount of such 2028 Notes, plus accrued and unpaid interest up to, but excluding, the redemption date. Upon the occurrence of a Fundamental Change (as defined in the 2028 Indenture), the holders of the 2028 Notes may require that we repurchase all or part of the principal amount of the 2028 Notes at a purchase price of par plus unpaid interest up to, but excluding, the maturity date. The 2028 Indenture includes customary “events of default,” which may result in the acceleration of the maturity of the 2028 Notes under the 2028 Indenture. The 2028 Indenture also includes customary covenants for convertible notes of this type. To the extent we elect, the sole remedy for an event of default relating to our failure to comply with certain of our reporting obligations shall, for the first 360 calendar days after the occurrence of such an event of default, consist exclusively of the right to receive additional interest on the 2028 Notes at a rate equal to (i) 0.25% per annum of the principal amount of the 2028 Notes outstanding for each day during the first 180 calendar days of the 360-day period after the occurrence of such an event of default during which such event of default is continuing (or, if earlier, the date on which such event of default is cured or waived) and (ii) 0.50% per annum of the principal amount of the 2028 Notes outstanding for each day from, and including, the 181st calendar day to, and including, the 360th calendar day after the occurrence of such an event of default during which such event of default is continuing (or, if earlier, the date on which such event of default is cured or waived as provided for in the 2028 Indenture). On the 361st day after such event of default (if the event of default relating to our failure to comply with its obligations is not cured or waived prior to such 361st day), the 2028 Notes shall be subject to acceleration as provided for in the 2028 Indenture. The 2028 Notes are accounted for in accordance with the authoritative guidance for convertible debt instruments that may be settled in cash upon conversion. Under ASU 2020-06, the guidance requires that debt with an embedded conversion feature is accounted for in its entirety as a liability and no portion of the proceeds from the issuance of the convertible debt instrument is accounted for as attributable to the conversion feature unless the conversion feature is required to be accounted for separately as an embedded derivative or the conversion feature results in a substantial premium. The conversion feature of the 2028 Notes is not accounted for as an embedded derivative because it is considered to be indexed to our common stock, and the 2028 Notes were not issued at a premium; therefore, the 2028 Notes are accounted for in their entirety as a liability. Because we may elect to settle any conversions entirely in shares, and because settlement in shares is the default settlement method, the liability is classified as non-current. The requirement to repurchase the 2028 Notes, including unpaid interest to the maturity date in the event of a Fundamental Change, is considered a put option for certain periods requiring bifurcation under ASC 815 – Derivatives and Hedging. However, given the low probability of such a Fundamental Change occurring during the applicable periods, the value of the embedded derivative is immaterial. The additional interest feature in the event of our failure to comply with certain reporting obligations is also considered an embedded derivative requiring bifurcation under ASC 815. However, due to the nature and terms of the reporting obligations, the value of the embedded derivative is immaterial. We incurred issuance costs related to the 2028 Notes of approximately $4.5 million, which were recorded as debt issuance costs and are presented as a reduction to the 2028 Notes on our Consolidated Balance Sheets and are amortized to interest expense using the effective interest method over the term of the 2028 Notes, resulting in an effective interest rate of 1.6%. The net carrying amount of the liability for the 2028 Notes is included as convertible senior notes, net, non-current in the Condensed Consolidated Balance Sheets as follows (in thousands):
| September 30, 2023 |  | December 31, 2022
Principal amount | $ | 459,000 |  |  | $ | 900,000 |
Unamortized debt issuance costs | (1,453) |  |  | (3,317) |
Net carrying amount | $ | 457,547 |  |  | $ | 896,683 |
For the three and nine months ended September 30, 2023 and 2022, interest expense for the 2028 Notes was as follows (in thousands):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2023 |  | 2022 |  | 2023 |  | 2022
Contractual interest expense | $ | 1,721 |  |  | $ | 3,375 |  |  | $ | 8,415 |  |  | $ | 10,125 |
Amortization of debt issuance costs | 80 |  |  | 154 |  |  | 392 |  |  | 462 |
Total interest expense | $ | 1,801 |  |  | $ | 3,529 |  |  | $ | 8,807 |  |  | $ | 10,587 |
As of September 30, 2023, the estimated fair value (Level 2) of the 2028 Notes was $358.6 million. The fair value of the 2028 Notes is estimated using a binomial lattice model that is primarily affected by the trading price of our common stock, market interest rates and volatility.

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