Oil And Gas Properties (Schedule Of Oil And Gas Properties) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Oil And Gas Properties [Abstract]
Oil and gas properties	$ 5,545,000		$ 5,545,000		$ 5,315,000
Unevaluated properties					106,000
Accumulated depreciation, depletion, and amortization	(806,000)		(806,000)		(196,000)
Oil and gas properties, net	4,739,000		4,739,000		$ 5,225,000
Depletion expense			608,000	$ 806,000
Impairment		$ 632,000		$ 2,718,000
Gain on asset retirement obligations			$ 2,000