Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Class A [Member]	Common Class B [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Stockholders' Equity Attributable to Parent at Dec. 30, 2017	$ 79,263	$ 45,839	$ 2,584	$ 157,139	$ (125,000)	$ (1,299)
Common Stock issued	0	119	0	(119)	0	0
Repurchases of Common Stock	(57)	(61)	0	4	0	0
Restricted stock grants issued	0	677	245	(922)	0	0
Restricted stock grants forfeited	(938)	(25)	(292)	(621)	0	0
Class B converted into Common Stock	0	19	(19)	0	0	0
Stock-based compensation expense	909	0	0	909	0	0
Net income (loss)	(21,384)	0	0	0	(21,384)	0
Other comprehensive income (loss)	1,191	0	0	0	0	1,191
Stockholders' Equity Attributable to Parent at Dec. 29, 2018	58,984	46,568	2,518	156,390	(146,384)	(108)
Common Stock issued	0	87	0	(87)	0	0
Repurchases of Common Stock	(827)	(1,535)	0	708	0	0
Restricted stock grants forfeited	(11)	(53)	0	42	0	0
Class B converted into Common Stock	0	8	(8)	0	0	0
Stock-based compensation expense	494	0	0	494	0	0
Net income (loss)	15,271	0	0	0	15,271	0
Other comprehensive income (loss)	(700)	0	0	0	0	(700)
Stockholders' Equity Attributable to Parent at Dec. 28, 2019	73,211	45,075	2,510	157,547	(131,113)	(808)
Repurchases of Common Stock	(921)	(1,668)	0	747	0	0
Restricted stock grants issued	0	265	131	(396)	0	0
Stock-based compensation expense	431	0	0	431	0	0
Net income (loss)	(9,208)	0	0	0	(9,208)	0
Other comprehensive income (loss)	278	0	0	0	0	278
Stockholders' Equity Attributable to Parent at Dec. 26, 2020	$ 63,791	$ 43,672	$ 2,641	$ 158,329	$ (140,321)	$ (530)