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. 28, 2013	$ 70,771	$ 37,324	$ 2,611	$ 137,170	$ (106,550)	$ 216
Common Stock issued	192	86	7	99	0	0
Common Stock issued under equity offering	24,559	7,500	0	17,059	0	0
Repurchases of Common Stock	(497)	(142)	0	(355)	0	0
Restricted stock grants issued	0	208	96	(304)	0	0
Restricted stock grants forfeited	0	(15)	(360)	375	0	0
Class B converted into Common Stock	0	61	(61)	0	0	0
Stock-based compensation expense	1,195	0	0	1,195	0	0
Excess tax benefits from stock-based compensation expense	(112)	0	0	(112)	0	0
Net income (loss)	(1,402)	0	0	0	(1,402)	0
Other comprehensive income (loss)	(1,729)	0	0	0	0	(1,729)
Stockholders' Equity Attributable to Parent at Dec. 27, 2014	92,977	45,022	2,293	155,127	(107,952)	(1,513)
Common Stock issued	275	161	0	114	0	0
Common Stock issued under Directors' Stock Plan	0	92	0	(92)	0	0
Repurchases of Common Stock	(584)	(193)	0	(391)	0	0
Restricted stock grants issued	0	326	347	(673)	0	0
Restricted stock grants forfeited	0	(27)	0	27	0	0
Class B converted into Common Stock	0	85	(85)	0	0	0
Stock-based compensation expense	1,406	0	0	1,406	0	0
Excess tax benefits from stock-based compensation expense	216	0	0	216	0	0
Net income (loss)	(2,426)	0	0	0	(2,426)	0
Other comprehensive income (loss)	(1,060)	0	0	0	0	(1,060)
Stockholders' Equity Attributable to Parent at Dec. 26, 2015	90,804	45,466	2,555	155,734	(110,378)	(2,573)
Repurchases of Common Stock	(152)	(107)	0	(45)	0	0
Restricted stock grants issued	0	354	93	(447)	0	0
Restricted stock grants forfeited	0	(4)	0	4	0	0
Class B converted into Common Stock	0	36	(36)	0	0	0
Stock-based compensation expense	1,324	0	0	1,324	0	0
Excess tax benefits from stock-based compensation expense	(189)	0	0	(189)	0	0
Net income (loss)	(5,278)	0	0	0	(5,278)	0
Other comprehensive income (loss)	613	0	0	0	0	613
Stockholders' Equity Attributable to Parent at Dec. 31, 2016	$ 87,122	$ 45,745	$ 2,612	$ 156,381	$ (115,656)	$ (1,960)