EQUITY, STOCK-BASED COMPENSATION AND EARNINGS (LOSS) PER SHARE - Basic and diluted net loss per share (Details) - USD ($) $ in Thousands		3 Months Ended
	Sep. 27, 2021	Dec. 31, 2023	Dec. 31, 2022
Numerator:
Consolidated net loss		$ (15,828)	$ (86,932)
Less: Net (loss) income attributable to noncontrolling interests		(440)	391
Net loss attributable to common shareholders		$ (15,388)	$ (87,323)
Denominator:
Weighted-average shares outstanding - Basic (in shares)		25,764,000	25,603,000
Shares excluded in computing of earnings (in shares)		5,796,000	5,369,000
Shares issuable upon conversion (in shares)	3,040,268