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. 29, 2018	$ 58,984	$ 156,390	$ (146,384)	$ (108)	$ 46,568	$ 2,518
Stock Repurchased During Period, Value	(12)	22	0	0	(34)	0
Stock-based compensation expense	168	168	0	0	0	0
Net Income (Loss)	(6,672)	0	(6,672)	0	0	0
Other Comprehensive Income (Loss), Net of Tax	(361)	0	0	(361)	0	0
Restricted stock grants forfeited	(11)	9	0	0	(20)	0
Class B converted into common stock	0	0	0	0	8	(8)
Stockholders' Equity Attributable to Parent at Mar. 30, 2019	52,096	156,589	(153,056)	(469)	46,522	2,510
Stockholders' Equity Attributable to Parent at Dec. 29, 2018	58,984	156,390	(146,384)	(108)	46,568	2,518
Net Income (Loss)	(7,888)
Other Comprehensive Income (Loss), Net of Tax	(981)
Stockholders' Equity Attributable to Parent at Jun. 29, 2019	50,390	156,632	(154,272)	(1,089)	46,609	2,510
Stockholders' Equity Attributable to Parent at Mar. 30, 2019	52,096	156,589	(153,056)	(469)	46,522	2,510
Stock-based compensation expense	130	130	0	0	0	0
Net Income (Loss)	(1,216)	0	(1,216)	0	0	0
Other Comprehensive Income (Loss), Net of Tax	(620)	0	0	(620)	0	0
Stock Issued During Period, Value, Other	0	(87)	0	0	87	0
Stockholders' Equity Attributable to Parent at Jun. 29, 2019	50,390	156,632	(154,272)	(1,089)	46,609	2,510
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