Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2011	Dec. 31, 2010
Consolidated Balance Sheets (Parenthetical) [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, Shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, Shares outstanding (in shares)	0	0
Common stock, par value ( in dollars per share)	$ 0.001	$ 0.001
Common stock, Shares authorized ( in shares)	100,000,000	100,000,000
Common stock, Shares issued ( in shares)	52,315,204	45,284,527
Common stock, shares Outstanding (in shares)	52,315,204	45,284,527