CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($)	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) [Abstract]
Net sales	$ 65,325,616	$ 60,883,148
Cost of products sold	(50,663,943)	(47,074,105)
Gross margin	14,661,673	13,809,043
Product development expense	(775,444)	(2,239,776)
Selling and administrative expense	(10,024,958)	(8,398,265)
Restructuring costs	0	(836,694)
Operating profit	3,861,271	2,334,308
Interest expense	(827,664)	(292,540)
Other income	744,793	13,925
Income before income taxes	3,778,400	2,055,693
Income taxes	882,583	484,733
Net income	$ 2,895,817	$ 1,570,960
Earnings per Share:
Basic (in dollars per share)	$ 0.46	$ 0.25
Diluted (in dollars per share)	0.46	0.25
Cash dividends per share: (in dollars per share)	$ 0.11	$ 0.11