XML 57 R46.htm IDEA: XBRL DOCUMENT v3.20.2
4. Sales of Products: Schedule of sales by significant product type (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Details        
Concentrate sales   $ 1,468,758 $ 2,668,188 $ 2,602,655
Dore sales   78,896 57,143 89,673
Total $ 1,324,498 $ 1,547,654 $ 2,725,331 $ 2,692,328