v3.21.2

Convertible Senior Notes (Tables)

9 Months Ended

Sep. 30, 2021

Debt Disclosure [Abstract]

Summary of Convertible Notes

The outstanding 2023 Notes consist of the following:

						As of September 30, 2021						As of December 31, 2020
Liability component:
Principal						$	10,909					$	48,035
Unamortized debt discount						(765)						(4,915)
Unamortized debt issuance costs						(76)						(501)
Net carrying amount						10,068						42,619
Equity component:
Net carrying amount						$	2,321					$	10,217

The outstanding 2026 Notes consist of the following:

						As of September 30, 2021						As of December 31, 2020
Liability component:
Principal						$	316,250					$	316,250
Unamortized debt discount						(59,756)						(67,977)
Unamortized debt issuance costs						(4,489)						(5,114)
Net carrying amount						252,005						243,159
Equity component:
Net carrying amount						$	81,550					$	81,550

The outstanding 2025 Notes consist of the following:

						As of September 30, 2021						As of December 31, 2020
Liability component:
Principal						$	350,000					$	350,000
Unamortized debt discount						(62,894)						(73,075)
Unamortized debt issuance costs						(4,476)						(5,235)
Net carrying amount						282,630						271,690
Equity component:
Net carrying amount						$	73,109					$	73,097

Summary of Interest Expense

The following table sets forth total interest expense recognized related to the 2023 Notes:

						Three Months Ended September 30,												Nine Months Ended September 30,
						2021						2020						2021						2020
Contractual interest expense						$	20					$	431					$	172					$	1,294
Amortization of debt issuance costs						45						276						197						819
Amortization of debt discount						127						2,506						1,088						7,422
Total						$	192					$	3,213					$	1,457					$	9,535

The following table sets forth total interest expense recognized related to the 2026 Notes:

						Three Months Ended September 30,												Nine Months Ended September 30,
						2021						2020						2021						2020
Contractual interest expense						$	593					$	593					1,779						$	1,772
Amortization of debt issuance costs						219						206						636						608
Amortization of debt discount						2,801						2,698						8,188						7,959
Total						$	3,613					$	3,497					$	10,603					$	10,339

The following table sets forth total interest expense recognized related to the 2025 Notes:

						Three Months Ended						Nine Months Ended
						September 30, 2021						September 30, 2021
Contractual interest expense						$	109					$	327
Amortization of debt issuance costs						241						717
Amortization of debt discount						3,416						10,122
Total						$	3,766					$	11,166

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