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Mortgage Revenue Bonds - Schedule of MRBs Acquisitions (Parenthetical) (Details) - USD ($)	Sep. 30, 2025	Sep. 30, 2024
Schedule Of Available For Sale Securities [Line Items]
Floor rate		3.95%
Mortgage Revenue Bonds [Member] | Series M [Member] | Agape Helotes [Member] | Helotes, TX [Member]
Schedule Of Available For Sale Securities [Line Items]
Principal acquired at discount	$ 514,000
Principal acquired discount percentage	8.50%
Mortgage Revenue Bonds [Member] | Series M [Member] | Residency at the Mayer [Member] | Hollywood, CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Floor rate		3.85%
Partnership re-allocated funding of taxable MRB		$ 11,500,000

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