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6 - Segment Information: Schedule of Segment Reporting Information (Details) - USD ($)
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Net Sales $ 32,873,002 $ 37,174,249
Depreciation and Amortization 1,382,235 1,308,448
Accounts receivable, net 4,609,314 5,529,307
Inventories, net 4,951,177 6,100,391
Property, plant and equipment, net 13,674,053 13,258,146
Fastener    
Net Sales 28,989,667 33,712,458
Depreciation and Amortization 1,217,174 1,161,082
Segment operating profit 1,762,835 3,731,998
Selling and Administrative Expenses 0 0
Other Income 0 0
Capital expenditures 1,522,541 1,635,115
Accounts receivable, net 4,313,185 5,196,437
Inventories, net 3,985,883 5,075,290
Property, plant and equipment, net 11,047,439 10,726,191
Other assets 0 0
Assembly Equipment    
Net Sales 3,883,335 3,461,791
Depreciation and Amortization 126,430 112,942
Segment operating profit 1,083,548 1,108,248
Selling and Administrative Expenses 0 0
Other Income 0 0
Capital expenditures 233,697 49,884
Accounts receivable, net 296,129 332,870
Inventories, net 965,294 1,025,101
Property, plant and equipment, net 1,686,764 1,579,497
Other assets 0 0
Unallocated Corporate    
Net Sales 0 0
Depreciation and Amortization 38,631 34,424
Segment operating profit 0 0
Selling and Administrative Expenses (2,354,799) (2,437,598)
Other Income 191,730 153,537
Capital expenditures 46,676 338,191
Accounts receivable, net 0 0
Inventories, net 0 0
Property, plant and equipment, net 939,850 952,458
Other assets $ 8,488,832 $ 8,358,781