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)	1,321,000
Other comprehensive income	346,000
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
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
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)	(7,844,000)
Other comprehensive income	170,000
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
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)
Other comprehensive income	0
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