Debt - Schedule of Debt Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Gross Amount	$ 333,373	$ 333,373	$ 367,762
Debt Issuance Costs	(7,150)	(7,526)	(8,778)
Carrying Amount	326,223	325,847	358,984
Gross Amount	367,762	367,762	367,762
Debt Issuance Costs	(7,232)	(7,650)	(8,778)
Carrying Amount	360,530	360,112	358,984
Less current portion, Gross Amount	34,389	34,389	0
Less current portion, Debt Issuance Costs	(82)	(124)	0
Less current portion, Carrying Amount	34,307	34,265	0
Senior Notes
Debt Instrument [Line Items]
Gross Amount	367,762
2029 Convertible Notes | Senior Notes
Debt Instrument [Line Items]
Gross Amount	230,000	230,000	230,000
Debt Issuance Costs	(6,472)	(6,716)	(7,351)
Carrying Amount	223,528	223,284	222,649
Gross Amount	230,000
2025 Convertible Notes | Senior Notes
Debt Instrument [Line Items]
Gross Amount	103,373	103,373	103,373
Debt Issuance Costs	(678)	(810)	(1,181)
Carrying Amount	102,695	102,563	102,192
Gross Amount	103,373
2024 Convertible Notes | Senior Notes
Debt Instrument [Line Items]
Gross Amount	34,389	34,389	34,389
Debt Issuance Costs	(82)	(124)	(246)
Carrying Amount	34,307	$ 34,265	$ 34,143
Gross Amount	$ 34,389