CONSOLIDATED CONDENSED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income	Class B Common Stock Common Stock
Balance a the beginning at Dec. 26, 2020	$ 63,791,000	$ 43,672,000	$ 158,329,000	$ (140,321,000)	$ (530,000)	$ 2,641,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchases of Common Stock	(56,000)	(52,000)	(4,000)
Restricted stock grants issued	0	669,000	(1,043,000)			374,000
Restricted stock grants forfeited	(4,000)	(22,000)	18,000
Stock-based compensation expense	75,000		75,000
Net income (loss)	(2,028,000)			(2,028,000)
Other comprehensive income	189,000			0	189,000
Balance at the end at Mar. 27, 2021	61,967,000	44,267,000	157,375,000	(142,349,000)	(341,000)	3,015,000
Balance a the beginning at Dec. 26, 2020	63,791,000	43,672,000	158,329,000	(140,321,000)	(530,000)	2,641,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	7,754,000
Other comprehensive income	459,000
Balance at the end at Sep. 25, 2021	72,274,000	44,378,000	157,520,000	(132,568,000)	(71,000)	3,015,000
Balance a the beginning at Mar. 27, 2021	61,967,000	44,267,000	157,375,000	(142,349,000)	(341,000)	3,015,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock grants issued		40,000
Common Stock issued under Directors' Stock Plan	0	120,000	(120,000)
Stock-based compensation expense	129,000		129,000
Net income (loss)	3,349,000			3,349,000
Other comprehensive income	157,000				157,000
Balance at the end at Jun. 26, 2021	65,602,000	44,387,000	157,384,000	(139,000,000)	(184,000)	3,015,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchases of Common Stock	(12,000)	(9,000)	(3,000)
Restricted stock grants issued		2,970
Stock-based compensation expense	139,000		139,000
Net income (loss)	6,433,000			6,433,000
Other comprehensive income	113,000				113,000
Balance at the end at Sep. 25, 2021	72,274,000	44,378,000	157,520,000	(132,568,000)	(71,000)	3,015,000
Balance a the beginning at Dec. 25, 2021	66,375,000	44,378,000	157,658,000	(138,706,000)	30,000	3,015,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchases of Common Stock	(95,000)	(105,000)	10,000
Restricted stock grants issued	0	580,000	(854,000)			274,000
Restricted stock grants forfeited	0	(6,000)	6,000
Stock-based compensation expense	154,000		154,000
Net income (loss)	(3,357,000)			(3,357,000)
Other comprehensive income	170,000				170,000
Balance at the end at Mar. 26, 2022	63,247,000	44,847,000	156,974,000	(142,063,000)	200,000	3,289,000
Balance a the beginning at Dec. 25, 2021	66,375,000	44,378,000	157,658,000	(138,706,000)	30,000	3,015,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(16,624,000)
Other comprehensive income	170,000
Balance at the end at Sep. 24, 2022	50,251,000	44,862,000	157,132,000	(155,330,000)	200,000	3,387,000
Balance a the beginning at Mar. 26, 2022	63,247,000	44,847,000	156,974,000	(142,063,000)	200,000	3,289,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock grants issued	0	331,000	(429,000)			98,000
Stock-based compensation expense	197,000		197,000
Net income (loss)	(4,487,000)			(4,487,000)
Balance at the end at Jun. 25, 2022	58,957,000	45,178,000	156,742,000	(146,550,000)	200,000	3,387,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock grants issued	(133,000)	(316,000)	183,000			0
Stock-based compensation expense	207,000		207,000
Net income (loss)	(8,780,000)			(8,780,000)
Other comprehensive income	0
Balance at the end at Sep. 24, 2022	$ 50,251,000	$ 44,862,000	$ 157,132,000	$ (155,330,000)	$ 200,000	$ 3,387,000