INCOME TAXES - TAX EFFECTS OF TEMPORARY DIFFERENCES (Details) - USD ($)	Sep. 30, 2024	Sep. 30, 2023
Deferred income tax assets:
Foreign tax credit carryover under U.S. tax law	$ 916,000	$ 928,000
U.S. federal net operating loss carryover	10,382,000	9,406,000
U.S. state unitary net operating loss carryovers	1,334,000	1,177,000
Canadian net operating loss carryovers	1,331,000	1,025,000
Tax basis of investment in land in excess of book basis under U.S. tax law	11,000	25,000
Property and equipment accumulated book depreciation and depletion in excess of tax under U.S. tax law	548,000	275,000
Asset retirement obligation accrued for books but not for tax under U.S. tax law	907,000	1,084,000
Asset retirement obligation accrued for books but not for tax under Canadian tax law	2,141,000	2,461,000
Other liabilities accrued for books but not for tax under U.S. tax law	669,000	612,000
Foreign currency loss under U.S. tax law	68,000	68,000
Foreign currency loss under Canadian tax law	79,000	81,000
Other	168,000	116,000
Total gross deferred income tax assets	18,554,000	17,258,000
Less Valuation allowance	(13,896,000)	(12,439,000)
Net deferred income tax assets	4,658,000	4,819,000
Deferred income tax liabilities:
Property and equipment accumulated tax depreciation and depletion in excess of book under Canadian tax law	(117,000)	(926,000)
Book basis of investment in land development partnerships in excess of tax basis under U.S. tax law	(282,000)	(133,000)
Book basis of investment in land development partnerships in excess of tax basis under U.S. state non-unitary tax law	(86,000)	(40,000)
U.S. oil and gas property and equipment accumulated tax depreciation and depletion in excess of book under U.S. tax law	(698,000)	(906,000)
U.S. oil and gas property and equipment accumulated tax depreciation and depletion in excess of book under U.S. state tax law	(16,000)	(19,000)
U.S. tax law impact of foreign branch deferred tax asset under Canadian tax law	(2,215,000)	(1,655,000)
Asset for retirement benefits	(1,029,000)	(939,000)
Other	(315,000)	(259,000)
Total deferred income tax liabilities	(4,758,000)	(4,877,000)
Net deferred income tax liability	(100,000)	(58,000)
Net deferred income tax liability included in Consolidated Balance Sheets:
Deferred income tax assets	0	0
Deferred income tax liabilities	(100,000)	(58,000)
Net deferred income tax liability	$ (100,000)	$ (58,000)