XML 103 R29.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Asset Retirement Obligations (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2021
Asset Retirement Obligations |
Schedule of Asset Retirement Obligations |
|  | 2021 |  |  | 2020 |
Balance at January 1 |  | $ | 173,001 |  |  | $ | 163,369 |
Accretion expense |  |  | 9,953 |  |  |  | 9,632 |
Change in asset retirement obligation estimate |  |  | (10,606 | ) |  |  | - |
Balance at December 31 |  | $ | 172,348 |  |  | $ | 173,001 |

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

X
- Definition Tabular disclosure of the carrying amount of a liability for asset retirement obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
Name: | us-gaap_ScheduleOfAssetRetirementObligationsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration