XML 83 R9.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Inventories | 12 Months Ended
--- | ---
Dec. 31, 2021
Inventories |
Inventories | 3. Inventories At December 31, 2021 and 2020, inventories consisted of the following:
|  | 2021 |  |  | 2020 |
Concentrate inventory |  |  |  |  |  |
In process |  | $ | 41,082 |  |  | $ | 90,743 |
Finished goods |  |  | 97,074 |  |  |  | 230,318 |
Total concentrate inventory |  |  | 138,156 |  |  |  | 321,061 |
Supplies inventory |  |  |  |  |  |  |  |
Mine parts and supplies |  |  | 54,998 |  |  |  | 52,600 |
Mill parts and supplies |  |  | 20,568 |  |  |  | 28,876 |
Total supplies inventory |  |  | 75,566 |  |  |  | 81,476 |
Total |  | $ | 213,722 |  |  | $ | 402,537 |

X
- References No definition available. + Details
Name: | njmc_InventoriesAbstract
Namespace Prefix: | njmc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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 https://asc.fasb.org/topic&trid=2126998 + Details
Name: | us-gaap_InventoryDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration