Balance Sheet Components - Schedule of Property and Equipment (Details) - USD ($)	Mar. 31, 2025	Sep. 30, 2024
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 27,405,000	$ 27,318,000
Less accumulated depreciation and amortization	(10,864,000)	(10,580,000)
Property and equipment, net	16,541,000	16,738,000
Land [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	11,609,000	11,609,000
Building and resort improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	13,405,000	13,382,000
Furniture, fixtures and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,033,000	1,033,000
Transportation equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,082,000	1,062,000
Operating lease right-of-use asset [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	85,000	85,000
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 191,000	$ 147,000