Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) shares in Thousands, $ in Thousands	Total	As previously reported	Adjustment	Common Stock	Additional Paid-in Capital	Accumulated deficit	Accumulated deficit As previously reported	Accumulated deficit Adjustment	Accumulated other comprehensive income (loss)
Beginning Balance at Sep. 29, 2019				$ 58	$ 256,002	$ (279,982)	$ (265,423)	$ (14,559)	$ (29,114)
Beginning Balance (in shares) at Sep. 29, 2019				5,765
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares (redeemed) issued				$ 0	(87)
Shares issued (in shares)				70
Stock compensation					1,042
Net income (loss)	$ (130)	$ (1,261)	$ 1,131			(130)	(1,261)	1,131
Net income attributable to non-controlling interests	(1,845)					(1,845)
Change in pension and postretirement benefits									11,464
Deferred income taxes, net									(2,400)
Ending Balance at Sep. 27, 2020	$ (44,992)	(31,564)	(13,428)	$ 58	256,957	(281,957)	(268,529)	(13,428)	(20,050)
Ending Balance (in shares) at Sep. 27, 2020	5,835			5,835
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares (redeemed) issued				$ 1	252
Shares issued (in shares)				54
Stock compensation					854
Net income (loss)	$ 24,792	24,832	(40)			24,792	24,832	(40)
Net income attributable to non-controlling interests	(2,047)					(2,047)
Change in pension and postretirement benefits									82,204
Deferred income taxes, net									(19,967)
Ending Balance at Sep. 26, 2021	$ 41,097	$ 54,565	$ (13,468)	$ 59	258,063	(259,212)	$ (245,744)	$ (13,468)	42,187
Ending Balance (in shares) at Sep. 26, 2021	5,889			5,889
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares (redeemed) issued				$ 1	(29)
Shares issued (in shares)				90
Stock compensation					1,487
Net income (loss)	$ 97					97
Net income attributable to non-controlling interests	(2,114)					(2,114)
Change in pension and postretirement benefits									(32,202)
Deferred income taxes, net									6,668
Ending Balance at Sep. 25, 2022	$ 15,005			$ 60	$ 259,521	$ (261,229)			$ 16,653
Ending Balance (in shares) at Sep. 25, 2022	5,979			5,979