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           Accrued U.S. Department of Energy Fee (Details Textual) (USD $) 
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        6 Months Ended | 
|---|---|
| 
           Jun. 30, 2014 
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| Accounts Payable And Accrued Expenses [Line Items] | |
| Noncontrolling Interest, Ownership Percentage by Parent | 51.00% | 
| Assets, Fair Value Adjustment | $ 5,000 | 
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- Details 
          
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- Definition 
          Amount of addition (reduction) to the amount at which an asset could be incurred (settled) in a current transaction between willing parties. No definition available. 
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- Definition 
          The parent entity's interest in net assets of the subsidiary, expressed as a percentage. No definition available. 
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