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