Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Condensed Consolidated Balance Sheets [Abstract]
Preferred Stock, par value	$ 0.001	$ 0.001
Preferred Stock, shares authorized	5,000,000	5,000,000
Preferred Stock, shares outstanding	0	0
Common Stock, par value	$ 0.001	$ 0.001
Common Stock, shares authorized	75,000,000	75,000,000
Common Stock, shares issued	29,756,324	29,577,146
Common Stock, shares outstanding	29,740,833	29,561,655
Treasury stock, shares	15,491	15,491