Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2012	Dec. 31, 2011
Preferred stock, shares authorized		48,989,914
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	200,000,000	68,000,000
Common stock, shares issued	36,204,792	36,204,792
Common stock, shares outstanding	4,385,439	4,385,439
Convertible preferred stock
Preferred stock, shares authorized	0	48,989,914
Preferred stock, shares issuable in Series A to E	0	48,989,914
Preferred stock, shares issued	0	48,664,392
Preferred stock, shares outstanding	0	48,664,392
Preferred stock, liquidation preference	$ 0	$ 165,096
Preferred stock, par value	$ 0.001	$ 0.001
Other preferred stock
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Preferred stock, par value	$ 0.001	$ 0.001