Segment Information (Details) - USD ($)	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Segment Reporting Information [Abstract]
Revenues, sales to unaffiliated customers	$ 65,325,616	$ 60,883,148
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
Operating Segments [Member] | Industrial Hardware [Member]
Segment Reporting Information [Abstract]
Revenues, sales to unaffiliated customers	47,236,605	38,403,343
Operating Profit	3,458,893	1,268,140
Operating Segments [Member] | Security Products [Member]
Segment Reporting Information [Abstract]
Revenues, sales to unaffiliated customers	12,384,484	14,683,004
Operating Profit	817,401	972,887
Operating Segments [Member] | Metal Products [Member]
Segment Reporting Information [Abstract]
Revenues, sales to unaffiliated customers	5,704,527	7,796,801
Operating Profit	$ (415,023)	$ 93,281