Discontinued Operations - Discontinued Oil and Gas Operations, Assets and Liabilities, Revenue and Net Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Current Assets:
Accounts receivable, net		$ 6
Total Current Assets		6
Total Assets of Discontinued Operations		6
Current Liabilities:
Trade payables	3	29
Revenues and royalties payable	18	18
Accrued contingencies	3,165
Accrued liabilities and other	51	113
Total Current Liabilities	3,237	160
Total Liabilities of Discontinued Operations	3,237	160
Loss from discontinued operations before taxes	$ (3,357)	$ (471)