6 - Segment Information: Disaggregation of Revenue (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenue	$ 27,590,653	$ 32,873,002
United States
Revenue	23,547,772	28,226,172
Foreign
Revenue	4,042,881	4,646,830
Automotive
Revenue	15,749,148	18,712,504
Nonautomotive
Revenue	11,841,505	14,160,498
Fastener
Revenue	24,607,863	28,989,667
Fastener | United States
Revenue	20,743,296	24,626,317
Fastener | Foreign
Revenue	3,864,567	4,363,350
Fastener | Automotive
Revenue	15,612,249	18,518,987
Fastener | Nonautomotive
Revenue	8,995,614	10,470,680
Assembly Equipment
Revenue	2,982,790	3,883,335
Assembly Equipment | United States
Revenue	2,804,476	3,599,855
Assembly Equipment | Foreign
Revenue	178,314	283,480
Assembly Equipment | Automotive
Revenue	136,899	193,517
Assembly Equipment | Nonautomotive
Revenue	$ 2,845,891	$ 3,689,818