Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2011	Dec. 31, 2010
Common stock, par value	$ 0.00001	$ 0.00001
Common stock, authorized	200,000,000	100,000,000
Common stock, issued	53,760,471	51,647,171
Common stock, outstanding	53,760,471	51,647,171