CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($)	3 Months Ended
	Apr. 03, 2021	Mar. 28, 2020
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED)
Net sales	$ 73,097,875	$ 65,325,616
Cost of products sold	(55,839,321)	(50,663,943)
Gross margin	17,258,554	14,661,673
Product development expense	(838,825)	(775,444)
Selling and administrative expenses	(10,485,520)	(10,024,958)
Operating profit	5,934,209	3,861,271
Interest expense	(702,859)	(827,664)
Other income	2,426,741	744,793
Income before income taxes	7,658,091	3,778,400
Income taxes	(1,817,264)	(882,583)
Net income	$ 5,840,827	$ 2,895,817
Earnings per share:
Basic	$ 0.93	$ 0.46
Diluted	0.93	0.46
Cash dividends per share:	$ 0.11	$ 0.11