Consolidated Statements of Stockholders' Equity Statement - USD ($) $ in Thousands	Total	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Common Class A [Member]	Common Class B [Member]
Stockholders' Equity Attributable to Parent at Dec. 28, 2019	$ 73,211	$ 157,547	$ (131,113)	$ (808)	$ 45,075	$ 2,510
Stock Repurchased During Period, Value	(204)	325	0	0	(529)	0
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	0	(395)	0	0	264	131
Stock-based compensation expense	93	93	0	0	0	0
Net Income (Loss)	(2,689)	0	(2,689)	0	0	0
Other Comprehensive Income (Loss), Net of Tax	(937)	0	0	(937)	0	0
Stockholders' Equity Attributable to Parent at Mar. 28, 2020	69,474	157,570	(133,802)	(1,745)	44,810	2,641
Stockholders' Equity Attributable to Parent at Dec. 26, 2020	63,791	158,329	(140,321)	(530)	43,672	2,641
Stock Repurchased During Period, Value	(56)	(4)	0	0	(52)	0
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	0	(1,043)	0	0	669	374
Stock-based compensation expense	75	75	0	0	0	0
Net Income (Loss)	(2,028)	0	(2,028)	0	0	0
Other Comprehensive Income (Loss), Net of Tax	189	0	0	189	0	0
Restricted stock grants forfeited	4	(18)	0	0	22	0
Stockholders' Equity Attributable to Parent at Mar. 27, 2021	$ 61,967	$ 157,375	$ (142,349)	$ (341)	$ 44,267	$ 3,015