Discontinued Operations - Discontinued Oil and Gas Operations, Assets and Liabilities, Revenue and Net Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Current Assets:
Accounts receivable, net	$ 3		$ 3		$ 6
Total Current Assets	3		3		6
Total Assets of Discontinued Operations	3		3		6
Current Liabilities:
Trade payables	5		5		29
Revenues and royalties payable	18		18		18
Accrued liabilities and other	50		50		113
Total Current Liabilities	73		73		160
Total Liabilities of Discontinued Operations	73		73		160
Income (loss) from discontinued operations before taxes	$ 81	$ (161)	$ 14	$ (271)