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3. Inventories | 12 Months Ended
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Dec. 31, 2019
Notes |
3. Inventories | 3. Inventories At December 31, 2019, inventories consisted of $197,862 in concentrate inventory and $27,284 in supplies inventory. At December 31, 2018, inventories consisted of $137,530 in concentrate inventory and $45,539 in supplies inventory. At December 31, 2018, the Company recognized an expense of $19,874 due to writing down concentrate inventory to net realizable value.

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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