Oil and Gas Disclosures (Unaudited) - Capitalized Costs Relating to Oil and Gas Producing Activities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Capitalized costs:
Proved properties	$ 4,071	$ 4,124
Unproved properties	391	326
Total capitalized costs	4,462	4,450
Less accumulated depreciation and amortization	(1,064)	(691)
Less impairment provision	(1,688)
Net capitalized costs	$ 1,710	$ 3,759