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. 28, 2019	73,211	157,547	(131,113)	(808)	45,075	2,510
Net Income (Loss)	(9,749)
Other Comprehensive Income (Loss), Net of Tax	(718)
Stockholders' Equity Attributable to Parent at Jun. 27, 2020	62,710	157,657	(140,862)	(1,526)	44,800	2,641
Stockholders' Equity Attributable to Parent at Mar. 28, 2020	69,474	157,570	(133,802)	(1,745)	44,810	2,641
Stock Repurchased During Period, Value	(3)	7	0	0	(10)	0
Stock-based compensation expense	80	80	0	0	0	0
Net Income (Loss)	(7,060)	0	(7,060)	0	0	0
Other Comprehensive Income (Loss), Net of Tax	219	0	0	219	0	0
Stockholders' Equity Attributable to Parent at Jun. 27, 2020	62,710	157,657	(140,862)	(1,526)	44,800	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
Restricted stock grants forfeited	(4)	(18)	0	0	(22)	0
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
Stockholders' Equity Attributable to Parent at Mar. 27, 2021	61,967	157,375	(142,349)	(341)	44,267	3,015
Stockholders' Equity Attributable to Parent at Dec. 26, 2020	63,791	158,329	(140,321)	(530)	43,672	2,641
Net Income (Loss)	1,321
Other Comprehensive Income (Loss), Net of Tax	346
Stockholders' Equity Attributable to Parent at Jun. 26, 2021	65,602	157,384	(139,000)	(184)	44,387	3,015
Stockholders' Equity Attributable to Parent at Mar. 27, 2021	61,967	157,375	(142,349)	(341)	44,267	3,015
Stock Issued During Period, Value, Other	0	(120)	0	0	120	0
Stock-based compensation expense	129	129	0	0	0	0
Net Income (Loss)	3,349	0	3,349	0	0	0
Other Comprehensive Income (Loss), Net of Tax	157	0	0	157	0	0
Stockholders' Equity Attributable to Parent at Jun. 26, 2021	$ 65,602	$ 157,384	$ (139,000)	$ (184)	$ 44,387	$ 3,015