SEGMENT INFORMATION (Details) - USD ($)	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Revenues:
Revenue, Net	$ 1,823,000	$ 4,280,000
Interest income	33,000	10,000
Total revenues	1,856,000	4,290,000
Depletion, depreciation, and amortization:
Depletion, depreciation, and amortization	280,000	324,000
Operating profit (loss) (before general and administrative expenses):
Operating profit (loss)	64,000	1,946,000
Equity in income (loss) of affiliates:
Equity in (loss) income of affiliates	(153,000)	2,326,000
General and administrative expenses	(1,481,000)	(2,027,000)
Interest income	33,000	10,000
Earnings (loss) before income taxes	(1,537,000)	2,255,000
Oil and natural gas
Revenues:
Revenue, Net	953,000	1,141,000
Depletion, depreciation, and amortization:
Depletion, depreciation, and amortization	199,000	235,000
Operating profit (loss) (before general and administrative expenses):
Operating profit (loss)	96,000	60,000
Land investment
Revenues:
Revenue, Net	0	1,678,000
Operating profit (loss) (before general and administrative expenses):
Operating profit (loss)	0	1,678,000
Contract drilling
Revenues:
Revenue, Net	842,000	1,406,000
Depletion, depreciation, and amortization:
Depletion, depreciation, and amortization	61,000	66,000
Operating profit (loss) (before general and administrative expenses):
Operating profit (loss)	(40,000)	176,000
Other
Revenues:
Revenue, Net	28,000	55,000
Depletion, depreciation, and amortization:
Depletion, depreciation, and amortization	20,000	23,000
Operating profit (loss) (before general and administrative expenses):
Operating profit (loss)	8,000	$ 32,000
Intersegment Eliminations
Revenues:
Revenue, Net	$ 0