Consolidated Statements of Income (USD $)	12 Months Ended
	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012
Consolidated Statements of Income [Abstract]
Net sales	$ 140,825,360	$ 142,458,279	$ 157,509,185
Cost of products sold	(108,338,956)	(112,310,759)	(124,156,707)
Gross margin	32,486,404	30,147,520	33,352,478
Selling and administrative expenses	(20,767,756)	(19,761,199)	(19,801,055)
Operating profit	11,718,648	10,386,321	13,551,423
Interest expense	(254,576)	(322,731)	(369,357)
Other income	64,691	50,305	42,452
Income before income taxes	11,528,763	10,113,895	13,224,518
Income taxes	3,867,287	3,211,974	4,598,718
Net income	$ 7,661,476	$ 6,901,921	$ 8,625,800
Earnings per Share:
Basic (in dollars per share)	$ 1.23	$ 1.11	$ 1.39
Diluted (in dollars per share)	$ 1.23	$ 1.11	$ 1.38