Summary of Quarterly Results (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 26, 2015	Oct. 03, 2015	Jul. 11, 2015	Mar. 21, 2015	Dec. 27, 2014	Oct. 04, 2014	Jul. 12, 2014	Mar. 22, 2014	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013
Quarterly Financial Information Disclosure [Line Items]
Net Sales	$ 43,744	$ 34,584	$ 43,795	$ 33,419	$ 40,643	$ 31,599	$ 38,012	$ 27,721	$ 155,542	$ 137,975	$ 132,991
Operating income	2,501	1,873	4,157	4,287	4,033	4,216	3,932	3,323	12,818	15,504	16,184
Net income from continuing operations	2,859	2,028	3,222	3,497	4,477	3,837	2,767	2,264	11,606	13,345	12,595
Net income (loss) from discontinued operations	0	0	0	0	(447)	9,784	(10,851)	(14)	0	(1,528)	(2,790)
Net income (Loss)	$ 2,859	$ 2,028	$ 3,222	$ 3,497	$ 4,030	$ 13,621	$ (8,084)	$ 2,250	$ 11,606	$ 11,817	$ 9,805
Basic Earnings Per Share Data:
Income from continuing operations	$ 0.20	$ 0.14	$ 0.23	$ 0.25	$ 0.32	$ 0.28	$ 0.20	$ 0.16	$ 0.82	$ 0.96	$ 0.93
Income (loss) from discontinued operations	0.00	0.00	0.00	0.00	(0.03)	0.70	(0.78)	0.00	0	(0.11)	(0.20)
Net Income (in dollars per share)	0.20	0.14	0.23	0.25	0.29	0.98	(0.58)	0.16	0.82	0.85	0.73
Diluted Earnings Per Share Data:
Income from continuing operations	0.20	0.14	0.23	0.25	0.32	0.27	0.20	0.16	0.82	0.95	0.92
Income (loss) from discontinued operations	0.00	0.00	0.00	0.00	(0.03)	0.69	(0.77)	0.00	0	(0.11)	(0.20)
Net Income (loss)	$ 0.20	$ 0.14	$ 0.23	$ 0.25	$ 0.29	$ 0.96	$ (0.57)	$ 0.16	$ 0.82	$ 0.84	$ 0.72