CONSOLIDATED BALANCE SHEETS Parenthetical (USD $)	Dec. 31, 2011	Dec. 31, 2010
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	240,000,000	240,000,000
Common stock, shares issued	6,658,903	327,499
Common stock, shares outstanding	6,658,903	327,499
Preferred stock
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Convertible preferred stock
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,500,000	5,500,000
Preferred stock, liquidation preference	$ 9.00	$ 9.00
Preferred stock, shares issued	0	1,966,376
Preferred stock, shares outstanding	0	1,966,376