Convertible Senior Notes and Capped Call Transactions - Narrative (Details)		9 Months Ended
	May 11, 2020 USD ($)	Sep. 30, 2023 USD ($) $ / shares	Dec. 31, 2022 USD ($)	Jan. 01, 2022 USD ($)
Debt Instrument [Line Items]
Accumulated deficit		$ (643,492,000)	$ (543,474,000)
Decrease in additional paid in capital		$ (1,111,076,000)	(1,055,048,000)
Cap price (in dollars per share) | $ / shares		$ 47.24
Cumulative Effect, Period of Adoption, Adjustment
Debt Instrument [Line Items]
Accumulated deficit				$ 8,647,000
Decrease in additional paid in capital				30,794,000
Liabilities				$ 22,147,000
2025 Senior Notes
Debt Instrument [Line Items]
Fair value of the notes		$ 295,848,000	$ 260,749,000
Convertible Debt
Debt Instrument [Line Items]
Purchases of capped calls	$ 29,348,000
Convertible Debt | 2025 Senior Notes
Debt Instrument [Line Items]
Principal	253,000
Proceeds from issuance of convertible senior notes, net of issuance costs	$ 245,158,000
Interest rate, stated percentage	1.25%
Debt instrument, convertible, conversion ratio		0.0325668
Initial conversion price (in dollars per share) | $ / shares		$ 30.71
Interest rate, effective percentage				1.87%