Oil And Gas Properties (Schedule Of Oil And Gas Properties) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Oil And Gas Properties [Abstract]
Oil and gas properties	$ 5,373,000		$ 5,315,000
Unevaluated properties	48,000		106,000
Accumulated depreciation, depletion, and amortization	(401,000)		(196,000)
Oil and gas properties	5,020,000		$ 5,225,000
Depletion expense	204,000	$ 302,000
Impairment	0	$ 641,000
Gain on asset retirement obligations	$ 1,000