CONSOLIDATED BALANCE SHEETS (PARENTHETICAL) (USD $)	Dec. 31, 2011	Dec. 31, 2010
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	600,000,000	600,000,000
Common stock, shares issued	166,125,215	161,463,280
Common stock, shares outstanding	166,125,215	161,463,280