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Related Party Notes Payable (Detail) - Proceeds from Related Party Transaction (USD $)
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Dec. 31, 2011
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Dec. 31, 2009
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| Financial Instrument: | ||
| Related party convertible notes payable | $ 2,272,500 | |
| Derivative liability | 1,227,500 | (1,227,500) |
| [RelatedPartyTransactionDueFromToRelatedParty] | $ 3,500,000 |
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