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Commitments and Contingencies - Summary of Partnership's Maximum Exposure Under Guaranty Agreements (Details)	6 Months Ended
	Jun. 30, 2023 USD ($)
The 50/50 MF Property--TIF Loan [Member]
Long-term Purchase Commitment [Line Items]
Partnership's Maximum Exposure as of September 30, 2022	$ 1,515,941
End of Guaranty Period	2025
The 50/50 MF Property--Mortgage [Member]
Long-term Purchase Commitment [Line Items]
Partnership's Maximum Exposure as of September 30, 2022	$ 22,140,405
End of Guaranty Period	2027
Ohio Properties [Member]
Long-term Purchase Commitment [Line Items]
Partnership's Maximum Exposure as of September 30, 2022	$ 2,310,609
End of Guaranty Period	2026
Greens of Pine Glen [Member]
Long-term Purchase Commitment [Line Items]
Partnership's Maximum Exposure as of September 30, 2022	$ 1,662,397
End of Guaranty Period	2027

X

- Definition

Year Of Guarantee Agreement Term Ending .

+ References

No definition available.

+ Details

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Namespace Prefix:	ghi_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI https://asc.fasb.org/extlink&oid=124440162&loc=d3e12069-110248

+ Details

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X

- 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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- Details

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