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Fair Value Measurements (Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2013
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Dec. 31, 2012
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|---|---|---|
| Liabilities | ||
| Derivative liabilities on account of warrants | $ 4,083 | $ 7,612 |
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Fair Value, Inputs, Level 1
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| Liabilities | ||
| Derivative liabilities on account of warrants | 0 | 0 |
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Fair Value, Inputs, Level 2
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| Liabilities | ||
| Derivative liabilities on account of warrants | 0 | 0 |
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Fair Value, Inputs, Level 3
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| Liabilities | ||
| Derivative liabilities on account of warrants | $ 4,083 | $ 7,612 |