Number of major customers.

No definition available.

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- Definition

The amount of proceeds from tax exempt bonds to be used to fund the public improvements.

+ References

No definition available.

+ Details

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Namespace Prefix:	rmri_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The sale price of water rights.

+ References

No definition available.

+ Details

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Balance Type:	debit
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- Definition

Area of land held.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

+ Details

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- Definition

Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

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Balance Type:	credit
Period Type:	duration

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8672-108599

+ Details

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- Definition

The cash inflow from the issuance of long-term tax exempt debt that is not secured by collateral.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Details

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- Details

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Period Type:

- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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SEGMENT REPORTING - Description (Details)	1 Months Ended		3 Months Ended		6 Months Ended
SEGMENT REPORTING - Description (Details)	Sep. 30, 2021 USD ($)	Apr. 30, 2021 USD ($)	Sep. 30, 2022 segment	Sep. 30, 2021 USD ($) segment	Sep. 30, 2022 USD ($) customer segment	Sep. 30, 2021 USD ($) segment	Dec. 31, 2018 a
Segment Reporting Information [Line Items]
Number of reportable segments \| segment			2	2	2	2
Number of major customers \| customer					2
Proceeds from issuance of unsecured tax exempt bonds		$ 65,200,000
Proceeds from tax exempt bonds to be used to fund the public improvements		$ 51,200,000
Sale price	$ 5,900,000
Gain on sale of assets				$ 4,798,291	$ (5,909)	$ 4,798,291
Accounts receivable \| Customer \| Construction A
Segment Reporting Information [Line Items]
Concentration risk, percentage					66.00%
Accounts receivable \| Customer \| Construction Company B [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage					18.00%
Revenue \| Customer \| Customer A [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage					75.00%
Revenue \| Customer \| Customer B [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage					10.00%
Land Improvements
Segment Reporting Information [Line Items]
Area of Land \| a							620