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Commitments and Contingencies (Details)
0 Months Ended 3 Months Ended
Feb. 25, 2011
agreement
Mar. 31, 2013
majorfinancialinstitution
Commitments and Contingencies Disclosure [Abstract]    
Separate representation agreements 2  
Potential number of warrants issued under representation agreements during 2013 and 2014 100,000  
Number of financial institutions maintaining cash   1