Consolidated Statements of Income (USD $)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Consolidated Statements of Income [Abstract]
Net sales	$ 142,458,279	$ 157,509,185	$ 142,856,049
Cost of products sold	(112,310,759)	(124,156,707)	(115,504,443)
Gross margin	30,147,520	33,352,478	27,351,606
Selling and administrative expenses	(19,761,199)	(19,801,055)	(18,639,426)
Operating profit	10,386,321	13,551,423	8,712,180
Interest expense	(322,731)	(369,357)	(231,481)
Other income	50,305	42,452	26,230
Income before income taxes	10,113,895	13,224,518	8,506,929
Income taxes	3,211,974	4,598,718	3,001,999
Net income	$ 6,901,921	$ 8,625,800	$ 5,504,930
Earnings per Share:
Basic (in dollars per share)	$ 1.11	$ 1.39	$ 0.89
Diluted (in dollars per share)	$ 1.11	$ 1.38	$ 0.89