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Investment in American Shale Oil, LLC (Details 2) - AMSO, LLC [Member] - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Summarized statements of operations AMSO, LLC |  |  |
REVENUES |  |  |
OPERATING EXPENSES: |  |  |
General and administrative | $ 403 | $ 456 | $ 566
Research and development | 4,782 | 7,755 | 8,601
TOTAL OPERATING EXPENSES | 5,185 | 8,211 | 9,167
Loss from operations | $ (5,185) | $ (8,211) | (9,167)
Other income |  |  | 41
NET LOSS | $ (5,185) | $ (8,211) | $ (9,126)

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