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Fair Value Measurements - Additional Information (Detail) (USD $)
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6 Months Ended | |
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Jun. 30, 2012
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Dec. 31, 2011
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Increase in fair value of warrant liability | $ 56,131 | |
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Fair Value, Measurements, Recurring
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Risk free rate | 2.00% | |
| Dividend yield | 0.00% | |
| Expected life | 10 years | |
| Volatility rate | 65.00% | |
| Fair value of warrant liability | $ 136,488 | $ 80,357 |