Balance Sheet Components - Schedule of Property and Equipment (Details) - USD ($)	Jun. 30, 2025	Sep. 30, 2024
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 27,386,000	$ 27,318,000
Less accumulated depreciation and amortization	(10,931,000)	(10,580,000)
Property and equipment, net	16,455,000	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	13,437,000	13,382,000
Furniture, fixtures and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,043,000	1,033,000
Transportation equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,002,000	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	$ 210,000	$ 147,000