Quarterly report pursuant to Section 13 or 15(d)

Property and Equipment - Additional Information (Detail)

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Property and Equipment - Additional Information (Detail) - USD ($)
6 Months Ended
Jun. 30, 2015
Dec. 31, 2014
Property, Plant and Equipment [Abstract]    
Fully depreciated no longer in use computer software and hardware and furniture, fixtures and equipment write-off $ 2,000,000  
Capital lease obligations   $ 0