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3. Summary of Significant Accounting Policies - Liabilities accounted for at fair value on a recurring basis (Details) (USD $)
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Sep. 30, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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|---|---|---|---|
| Liabillities accounted at fair value | $ 267,566 | $ 436,553 | |
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Quoted prices in active markets (Level 1)
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| Liabillities accounted at fair value | |||
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Significant other observable inputs (Level 2)
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| Liabillities accounted at fair value | |||
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Significant unobservable inputs (Level 3)
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| Liabillities accounted at fair value | 267,566 | ||
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Series D Common Stock Purchase Warrants
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| Liabillities accounted at fair value | 267,566 | 231,200 | |
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Series D Common Stock Purchase Warrants | Quoted prices in active markets (Level 1)
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|||
| Liabillities accounted at fair value | |||
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Series D Common Stock Purchase Warrants | Significant other observable inputs (Level 2)
|
|||
| Liabillities accounted at fair value | |||
|
Series D Common Stock Purchase Warrants | Significant unobservable inputs (Level 3)
|
|||
| Liabillities accounted at fair value | $ 267,566 |