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Summary of Significant Accounting Policies (Detail) - Carrying Values and Estimated Fair Values of Outstanding Notes (USD $)
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Jun. 30, 2012
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Dec. 31, 2011
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Related Party BSC Convertible Notes Payable [Member]
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| Notes Payable - Carrying Value | $ 4,338,601 | $ 3,500,000 |
| Notes Payable - Estimated Fair Value | 3,469,704 | 3,500,000 |
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The 2010 Unsecured Convertible Notes Payable [Member]
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| Notes Payable - Carrying Value | 3,953,595 | |
| Notes Payable - Estimated Fair Value | 4,071,000 | |
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The 2010 Junior Secured Notes Payable [Member]
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| Notes Payable - Carrying Value | 194,314 | |
| Notes Payable - Estimated Fair Value | 1,746,222 | |
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Related Party 2011 Unsecured Convertible Notes Payable [Member]
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| Notes Payable - Carrying Value | 877,294 | |
| Notes Payable - Estimated Fair Value | 1,310,000 | |
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The 2011 Junior Secured Note Payable [Member]
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| Notes Payable - Carrying Value | 2,000,000 | |
| Notes Payable - Estimated Fair Value | 2,000,000 | |
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The 2011 Junior Secured Convertible Note Payable [Member]
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| Notes Payable - Carrying Value | 1,308,390 | |
| Notes Payable - Estimated Fair Value | $ 1,625,000 |
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- Details
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