Debt (Details) $ / shares in Units, shares in Thousands			1 Months Ended				3 Months Ended		9 Months Ended		21 Months Ended
	Jul. 19, 2024 USD ($)	Apr. 30, 2020 USD ($) $ / shares	Oct. 31, 2023	Nov. 30, 2022 USD ($)	Apr. 30, 2020 USD ($) D $ / shares	Jul. 31, 2017	Sep. 30, 2024 USD ($) $ / shares shares	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) $ / shares shares	Sep. 30, 2023 USD ($)	Sep. 30, 2023	Dec. 31, 2023 USD ($) $ / shares shares	Jun. 30, 2023 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2015 USD ($)
Debt Instrument [Line Items]
Remaining borrowing capacity							$ 20,000,000.0		$ 20,000,000.0
Collateral amount							$ 150,000,000.0		$ 150,000,000.0
Common Stock, Par or Stated Value Per Share | $ / shares							$ 0.0001		$ 0.0001			$ 0.0001
Common stock, shares issued | shares							124,137		124,137			119,581
Accrued Interest							$ 1,000		$ 1,000			$ 1,078,000
Amortization of debt discount and issuance cost									991,000	$ 966,000
Interest expense							3,142,000	$ 3,252,000	9,393,000	9,490,000
Convertible Notes
Debt Instrument [Line Items]
Principal amount	$ 287,500,000	$ 287,500,000			$ 287,500,000		287,500,000		$ 287,500,000
Proceeds from Convertible Note, net of issuance costs					$ 278,300,000
Per annum interest rate (as a percent)	2.25%				2.25%				2.25%
Interest expense							$ 1,951,000	1,941,000	$ 5,843,000	5,817,000
Common Stock, Par or Stated Value Per Share | $ / shares		$ 0.0001			$ 0.0001
Debt instrument, term									7 years
Effective interest rate (as a percent)							2.72%		2.72%
Principal amount per convertible note					$ 1,000
Number of threshold consecutive trading days | D					30
Threshold business days | D					5
Conversion price (in dollars per share) | $ / shares		$ 38.79			$ 38.79
Initial conversion rate		25.7785
Conversion rate increase	0.4284
Convertible to shares of common stock		7,411,704
Percentage of principal amount converted	100.00%	100.00%
Convertible, if converted common shares aggregate value	$ 287,500,000
Carrying value							$ 283,936,000		$ 283,936,000			282,945,000
5 consecutive trading day period | Convertible Notes
Debt Instrument [Line Items]
Threshold trading days | D					5
Percentage of conversion price					98.00%
20 trading days period | Convertible Notes
Debt Instrument [Line Items]
Threshold trading days | D					20
Percentage of conversion price					130.00%
Redeemable for cash on or after May 2024
Debt Instrument [Line Items]
Number of threshold consecutive trading days | D					20
Threshold trading days | D					30
Percentage of conversion price					130.00%
Percentage of principal amount converted					100.00%
Level 2 | Convertible Notes
Debt Instrument [Line Items]
Fair value of long-term debt							929,100,000		929,100,000			491,800,000
Line Of Credit-UBS
Debt Instrument [Line Items]
Maximum borrowing capacity				$ 100,000,000.0									$ 100,000,000.0	$ 150,000,000.0	$ 50,000,000.0
Outstanding balance							80,400,000		80,400,000			$ 80,400,000
Credit facility drawn down									80,000,000.0
Remaining borrowing capacity							20,000,000.0		20,000,000.0
Borrowings under credit facility				$ 30,000,000.0
Collateral amount							150,000,000.0		150,000,000.0
Interest expense							$ 1,200,000	$ 1,300,000	$ 3,600,000	$ 3,700,000
Interest rate (as a percent)							5.66%		5.66%
Interest expense							$ 1,200,000
Line Of Credit-UBS | LIBOR
Debt Instrument [Line Items]
Spread on interest rate (as a percent)						1.10%
Line Of Credit-UBS | SOFR
Debt Instrument [Line Items]
Spread on interest rate (as a percent)			0.50%						0.50%		1.21%
2017 Term Loan
Debt Instrument [Line Items]
Debt, repayment amount					$ 79,200,000