Stockholder's Equity (Details) (USD $)	1 Months Ended	3 Months Ended	6 Months Ended					1 Months Ended		6 Months Ended
	May 31, 2011	Jun. 30, 2012 Funds Directors	Jun. 30, 2012 Funds Directors	Jun. 30, 2011	Dec. 31, 2011	Jun. 30, 2012 Maximum [Member]	Jun. 30, 2012 Minimum [Member]	Nov. 30, 2011 Public offering [Member]	Feb. 28, 2009 Private Placement [Member]	Jun. 30, 2012 Private Placement [Member]
Subsidiary, Sale of Stock [Line Items]
Increase the authorized number of shares of common stock from		200,000,000	200,000,000		100,000,000	200,000,000	100,000,000
Common stock issued		21,800,000	21,800,000					21,800,000	12,039,794
Share Price								$ 3.75	$ 7.13
Net of offering costs			$ 96,000	$ 1,401,000				$ 77,302,000		$ 86,243,000
Number of aggregate shares underlying warrants										6,019,897
Stockholders Equity (Textual) [Abstract]
Amount of Securities Issuable Under Shelf Registration	$ 150,000,000
Warrants price		0.125	0.125
Warrants exercise Price		7.84	7.84
Period for warrant term			5 years
Number of affiliated funds participating in private placement		6	6
Number of Directors participating in private placement		3	3
Liquidated damages			1.00%
Liquidated damages cap			8.00%