CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 02, 2016	Jul. 04, 2015	Jul. 02, 2016	Jul. 04, 2015
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) [Abstract]
Net sales	$ 36,883,312	$ 37,037,697	$ 69,984,969	$ 73,914,539
Cost of products sold	(28,281,709)	(29,125,536)	(54,962,920)	(58,667,200)
Gross margin	8,601,603	7,912,161	15,022,049	15,247,339
Selling and administrative expenses	(5,495,735)	(7,056,139)	(10,955,317)	(13,019,834)
Operating profit	3,105,868	856,022	4,066,732	2,227,505
Interest expense	(32,384)	(47,745)	(68,669)	(100,570)
Other income	5,144	19,960	26,518	26,967
Income before income taxes	3,078,628	828,237	4,024,581	2,153,902
Income taxes	990,791	243,643	1,288,671	695,357
Net income	$ 2,087,837	$ 584,594	$ 2,735,910	$ 1,458,545
Earnings per Share:
Basic (in dollars per share)	$ 0.33	$ 0.09	$ 0.44	$ 0.23
Diluted (in dollars per share)	0.33	0.09	0.44	0.23
Cash dividends per share: (in dollars per share)	$ 0.11	$ 0.11	$ 0.22	$ 0.22