Subsequent Events (Details) (USD $)	6 Months Ended		12 Months Ended
	Jun. 30, 2012	Jun. 30, 2010	Dec. 31, 2011
Subsequent Events (Textual) [Abstract]
Common stock new issued	9,330,199
Common stock for gross proceeds	$ 92,800,000	$ 32,268,457	$ 37,385,365
Aggregate gross offering proceeds from the sale of shares in the Private Offering	$ 95,200,000