CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($)	3 Months Ended			9 Months Ended
	Oct. 01, 2016	Oct. 03, 2015		Oct. 01, 2016	Oct. 03, 2015
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) [Abstract]
Net sales	$ 33,478,347	$ 36,239,500		$ 103,463,316	$ 110,154,039
Cost of products sold	(24,625,469)	(27,205,657)		(79,588,389)	(85,872,857)
Gross margin	8,852,878	9,033,843		23,874,927	24,281,182
Selling and administrative expenses	(5,588,764)	(5,584,222)		(16,544,081)	(18,604,056)
Operating profit	3,264,114	3,449,621		7,330,846	5,677,126
Interest expense	(28,817)	(45,203)		(97,486)	(145,773)
Other income	28,169	6,573		54,687	33,540
Income before income taxes	3,263,466	3,410,991		7,288,047	5,564,893
Income taxes	863,402	883,269		2,152,073	1,578,626
Net income	$ 2,400,064	$ 2,527,722		$ 5,135,974	$ 3,986,267
Earnings per Share:
Basic (in dollars per share)	$ 0.38	$ 0.41		$ 0.82	$ 0.64
Diluted (in dollars per share)	0.38	0.41		0.82	0.64
Cash dividends per share: (in dollars per share)	$ 0.11	$ 0.12	[1]	$ 0.33	$ 0.34	[1]

[1] Includes $ 0.01 per share redemption for the termination of the 2008 Shareholder Rights Agreement.