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. 31, 2016	$ 87,122	$ 45,745	$ 2,612	$ 156,381	$ (115,656)	$ (1,960)
Repurchases of Common Stock	(116)	(100)	0	(16)	0	0
Restricted stock grants issued	0	180	0	(180)	0	0
Restricted stock grants forfeited	(2)	(14)	0	(12)	0	0
Class B converted into Common Stock	0	28	(28)	0	0	0
Stock-based compensation expense	942	0	0	942	0	0
Net income (loss)	(9,555)	0	0	0	(9,555)	0
Other comprehensive income (loss)	872	0	0	0	0	872
Reclassification of stranded tax effects	0	0	0	0	211	(211)
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)