CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $)	3 Months Ended		6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013
Consolidated Statements of Comprehensive Income
Net sales	$ 71,552,068	$ 68,909,290	$ 124,945,625	$ 125,280,459
Cost of sales	56,914,412	54,386,401	102,417,462	99,654,522
Gross profit	14,637,656	14,522,889	22,528,163	25,625,937
Selling, general and administrative expenses	8,301,473	8,126,775	15,821,463	15,931,705
Other income	(61,970)	(16,733)	(99,195)	(723,695)
Operating income	6,398,153	6,412,847	6,805,895	10,417,927
Interest expense	77,335	39,472	153,446	137,565
Income from continuing operations before income taxes	6,320,818	6,373,375	6,652,449	10,280,362
Income tax expense	2,065,386	2,399,580	2,173,000	3,696,085
Income from continuing operations	4,255,432	3,973,795	4,479,449	6,584,277
Discontinued operations
Gain on sale of discontinued operations, net of tax			87,036
Operating loss of discontinued operations, net of tax		(3,048,664)	(1,654,459)	(3,355,340)
Loss of discontinued operations, net of tax		(3,048,664)	(1,567,423)	(3,355,340)
Net income	4,255,432	925,131	2,912,026	3,228,937
Other comprehensive income (loss), net of tax	14,782	(26,815)	21,042	(31,269)
Comprehensive income	$ 4,270,214	$ 898,316	$ 2,933,068	$ 3,197,668
Basic income (loss) per share:
Income from continuing operations (in dollars per share)	$ 0.26	$ 0.25	$ 0.27	$ 0.41
Loss from discontinued operations (in dollars per share)		$ (0.19)	$ (0.09)	$ (0.21)
Net income (loss) (in dollars per share)	$ 0.26	$ 0.06	$ 0.18	$ 0.20
Diluted income (loss) per share:
Income from continuing operations (in dollars per share)	$ 0.25	$ 0.24	$ 0.26	$ 0.40
Loss from discontinued operations (in dollars per share)		$ (0.18)	$ (0.09)	$ (0.20)
Net income (loss) (in dollars per share)	$ 0.25	$ 0.06	$ 0.17	$ 0.20
Shares used in the computation of income (loss) per share:
Basic (in shares)	16,341,887	16,098,387	16,258,466	16,053,098
Diluted (in shares)	16,757,781	16,462,115	16,705,887	16,356,692