Consolidated Statements of Income - USD ($)	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Consolidated Statements of Income [Abstract]
Net sales	$ 137,608,258	$ 144,567,951	$ 140,825,360
Cost of products sold	(103,315,387)	(112,186,725)	(108,338,956)
Gross margin	34,292,871	32,381,226	32,486,404
Selling and administrative expenses	(23,156,999)	(24,353,498)	(20,767,756)
Operating profit	11,135,872	8,027,728	11,718,648
Interest expense	(121,500)	(185,475)	(254,576)
Other income	209,043	178,722	64,691
Income before income taxes	11,223,415	8,020,975	11,528,763
Income taxes	3,438,092	2,293,932	3,867,287
Net income	$ 7,785,323	$ 5,727,043	$ 7,661,476
Earnings per Share:
Basic (in dollars per share)	$ 1.25	$ 0.92	$ 1.23
Diluted (in dollars per share)	$ 1.25	$ 0.92	$ 1.23