Debt - Schedule of Debt Instruments (Details) - USD ($)	Sep. 30, 2022	Oct. 01, 2021	Sep. 30, 2021
Debt Instrument [Line Items]
Carrying Amount		$ 311,471,000
Total long-term debt, Gross Amount	$ 316,250,000		$ 316,250,000
Total long-term debt, Debt Discount and Issuance Costs	(3,347,000)		(52,064,000)
Total long-term debt, Carrying Amount	312,903,000		264,186,000
Senior Notes | 2024 Convertible Notes
Debt Instrument [Line Items]
Gross Amount	143,750,000		143,750,000
Debt Issuance Costs	(1,175,000)		(20,207,000)
Carrying Amount	142,575,000		123,543,000
Senior Notes | 2025 Convertible Notes
Debt Instrument [Line Items]
Gross Amount	172,500,000		172,500,000
Debt Issuance Costs	(2,172,000)		(31,857,000)
Carrying Amount	$ 170,328,000		$ 140,643,000