CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2011	Dec. 31, 2010
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, issued
Preferred stock, outstanding
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares issued	30,036,481	29,385,326
Common stock, shares outstanding	30,036,481	29,385,326
Treasury stock, shares	264,047