Annual report pursuant to section 13 and 15(d)

Commitments and Contingencies (Details Textual)

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Commitments and Contingencies (Details Textual) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Commitments and Contingencies (Additional Textual) [Abstract]    
Price per warrant $ 0.70  
Common stock exercise price 5.00  
Acquisition date Oct. 25, 2007  
Expiration date Apr. 11, 2011  
Price per warrant for redemption $ 0.01  
Lease expenses $ 0.6 $ 0.5
Private Placement Warrants [Member]
   
Commitments and Contingencies (Textual) [Abstract]    
Privately held warrants 1,142,858  
Private Placement [Member]
   
Commitments and Contingencies (Textual) [Abstract]    
Commitment to purchase warrants by directors $ 1.0