DEBT - Convertible Senior Notes Narrative (Details)			12 Months Ended
	Nov. 27, 2021 USD ($) $ / shares	Nov. 04, 2021 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 13, 2024 USD ($)	Sep. 27, 2021
DEBT
Long-term debt, Carrying value			$ 393,339,000	$ 377,745,000
Unamortized debt issuance costs			11,950,000	11,397,000
Amortization of debt discount and issuance costs			11,745,000
Interest expense				4,529,000
Coupon interest expense				6,270,000
Accretion expense				946,000
Convertible Senior Notes
DEBT
Initial conversion rate	21.7162
Initial conversion price (in dollars per share) | $ / shares	$ 46.05
Unamortized debt issuance costs			$ 3,031,000	$ 4,172,000
Amortization of debt discount and issuance costs	$ 888,000
Interest expense	4,515,000
Interest and Debt Expense	11,089,000
Accretion Expense	$ 5,686,000
Percentage of noteholders	130.00%
Right to receive special interest maximum term	20 days
Right to receive special interest maximum rate	3000.00%
Threshold of aggregate principal holders (percent)						25.00%
Debt, principal amount	$ 140,000,000
Settlement period	13 days
Additional principal amount	$ 15,000,000
Convertible Senior Notes | Accounting Standards Update 2020-06
DEBT
Fair value remeasurement of embedded derivative		$ 20,000,000
Convertible Senior Notes Due 2027
DEBT
Period for discharge or stay	40 days
the Purchasers | Convertible Senior Notes | Convertible Debt
DEBT
Debt acquired					$ 8,333,000
Long-term debt, Carrying value					$ 131,667
Annual interest rate	3.25%