Business Segments (Tables)

12 Months Ended

Dec. 31, 2019

Segment Reporting [Abstract]

Business Segments

	Year Ended December 31,
	2019		2018		2017
Revenues: (1)
Oil and gas exploration, production	$	4,946,000	$	6,106,000	$	4,889,000
and operations
Gas gathering, compression and		125,000		136,000		126,000
equipment rental
Real estate rental		248,000		232,000		274,000
	$	5,319,000	$	6,474,000	$	5,289,000

	Year Ended December 31,
	2019		2018		2017
Depreciation, depletion, and
amortization expense:
Oil and gas exploration, production	$	408,000	$	461,000	$	1,043,000
and operations
Impairment of oil and gas assets						695,000
Gas gathering, compression and		1,000		13,000		13,000
equipment rental
Real estate rental		47,000		48,000		48,000
	$	456,000	$	522,000	$	1,799,000

	Year Ended December 31,
	2019			2018			2017
Income (loss) from operations:
Oil and gas exploration, production	$	1,836,000		$	2,975,000		$	2,359,000
and operations
Gas gathering, compression and		92,000			86,000			73,000
equipment rental
Real estate rental		22,000			(11,000	)		43,000
		1,950,000			3,050,000			2,475,000
Corporate and other (2)		(2,596,000	)		(2,786,000	)		(2,478,000	)
Consolidated net income (loss)	$	(646,000	)	$	264,000		$	(3,000	)

	Year Ended December 31,
	2019		2018		2017
Identifiable assets net of DDA:
Oil and gas exploration, production
and operations	$	2,108,000	$	3,449,000	$	4,574,000
Gas gathering, compression and
equipment rental		8,000		10,000		5,000
Real estate rental		1,276,000		1,323,000		1,371,000
		3,392,000		4,782,000		5,950,000
Corporate and other (3)		20,506,000		19,616,000		18,182,000
Consolidated total assets	$	23,898,000	$	24,398,000	$	24,132,000