CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) [Abstract]
Net sales	$ 58,044,743	$ 36,883,312	$ 94,088,038	$ 69,984,969
Cost of products sold	(44,040,068)	(28,281,709)	(71,795,204)	(54,962,920)
Gross margin	14,004,675	8,601,603	22,292,834	15,022,049
Selling and administrative expenses	(11,518,213)	(5,495,735)	(17,570,171)	(10,955,317)
Operating profit	2,486,462	3,105,868	4,722,663	4,066,732
Interest expense	(311,654)	(32,384)	(332,678)	(68,669)
Other income	36,112	5,144	55,765	26,518
Income before income taxes	2,210,920	3,078,628	4,445,750	4,024,581
Income taxes	744,518	990,791	1,462,207	1,288,671
Net income	$ 1,466,402	$ 2,087,837	$ 2,983,543	$ 2,735,910
Earnings per Share:
Basic (in dollars per share)	$ 0.23	$ 0.33	$ 0.48	$ 0.44
Diluted (in dollars per share)	0.23	0.33	0.47	0.44
Cash dividends per share: (in dollars per share)	$ 0.11	$ 0.11	$ 0.22	$ 0.22