Commitments And Contingencies (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2016 USD ($) item $ / bbl	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)
Loss Contingencies [Line Items]
Production costs and taxes	$ 839,000	$ 1,202,000
Decrease in compensation	$ 124,000		$ 142,000
Incidence Of Non-Compliance [Member]
Loss Contingencies [Line Items]
Wells issued incidence of non-compliance | item	1
Maximum potential loss	$ 386,000
Minimum [Member]
Loss Contingencies [Line Items]
Compensation reduction until WTI posting | $ / bbl	70
Compensation reimbursement at WTI posting | $ / bbl	85