Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Retained Earnings Including Noncontrolling Interests [Member]	AOCI Attributable to Parent [Member]	Total
Balance at Sep. 30, 2018	$ 57	$ 254,037	$ (279,691)		$ (11,746)
Balance (in shares) at Sep. 30, 2018	5,714
Shares issued	$ 1	(75)
Shares issued (in shares)	51
Stock compensation		2,040
Net Income (loss)				$ 15,909		$ 15,909
Net income attributable to non-controlling interests			(1,641)			1,641
Change in pension and postretirement benefits					(24,667)
Deferred income taxes, net					7,299
Balance at Sep. 29, 2019	$ 58	256,002	(265,423)		(29,114)	$ (38,477)
Balance (in shares) at Sep. 29, 2019	5,765					5,765
Shares issued	$ 0	(87)
Shares issued (in shares)	70
Stock compensation		1,042
Net Income (loss)				(1,261)		$ (1,261)
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)
Balance at Sep. 27, 2020	$ 58	256,957	(268,529)		(20,050)	$ (31,564)
Balance (in shares) at Sep. 27, 2020	5,835					5,835
Shares issued	$ 1	252
Shares issued (in shares)	54
Stock compensation		854
Net Income (loss)				$ 24,832		$ 24,832
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)
Balance at Sep. 26, 2021	$ 59	$ 258,063	$ (245,744)		$ 42,187	$ 54,565
Balance (in shares) at Sep. 26, 2021	5,889					5,889