Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Series A Non-Voting Convertible Preferred Stock	Dec. 31, 2011 Series A Non-Voting Convertible Preferred Stock
Preferred Stock, par value	$ 0.001	$ 0.001
Preferred Stock, shares authorized	5,000,000	5,000,000
Preferred Stock, shares outstanding			2,709,300	0
Common Stock, par value	$ 0.001	$ 0.001
Common Stock, shares authorized	75,000,000	75,000,000
Common Stock, shares issued	37,497,703	29,577,146
Common Stock, shares outstanding	37,482,212	29,561,655
Treasury stock, shares	15,491	15,491