XML 49 R33.htm IDEA: XBRL DOCUMENT v3.22.1

The Company and Significant Accounting Policies (Details)	Mar. 31, 2022	Dec. 31, 2021
Consolidated Balance Sheets
Investment Owned, Percent of Net Assets	65.00%	65.00%
Investment owned percentage of net assets 2	50.00%	50.00%
Investment owned percentage of net assets 3	37.00%	37.00%

X

- References

No definition available.

+ Details

Name:	njmc_InvestmentOwnedPercentageOfNetAssets2
Namespace Prefix:	njmc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	njmc_InvestmentOwnedPercentageOfNetAssets3
Namespace Prefix:	njmc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Percent of net assets at close of period. For schedules of investments that are categorized, each category has a percent of net assets for the aggregated value of the Investments in the category.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-12B(Column D))
-URI http://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section 50
-Paragraph 6
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=99383244&loc=d3e12121-115841

+ Details

Name:	us-gaap_InvestmentOwnedPercentOfNetAssets
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_TextBlockAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration