Basis of Presentation (Details) (USD $)	1 Months Ended	6 Months Ended
	May 31, 2011	Jun. 30, 2012 item	Dec. 31, 2011	May 06, 2011	Nov. 17, 2009
Basis of Presentation
Number of principal segments		2
Number of wholly-owned subsidiaries		2
Conversion ratio of reverse stock split of common stock	0.10
Common stock, par value (in dollars per share)		$ 0.01	$ 0.01		$ 0.01
Number of common stock shares outstanding before stock split				25,624,872
Number of common stock shares outstanding		4,159,777	3,094,461	2,562,488