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Related Party Transactions - Additional Information (Detail) - USD ($)
3 Months Ended 4 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 09, 2015
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Related Party Transactions [Abstract]            
Related party rent expense $ 35,000 $ 35,000   $ 104,000 $ 104,000  
Related party payable $ 2,893,000     $ 2,893,000   $ 11,000
Co-Chairman and Chief Executive Officer [Member]            
Related Party Transactions [Abstract]            
Related party payable     $ 2,862,000      
Maturity date     Oct. 09, 2015      
Annual interest rate       0.50%    
Related Party Transaction, Description       As of September 30, 2015, the principal amount under the Note accrues interest at a rate of One Half of One Percent (0.50%) per annum. The Note was due and payable October 9, 2015. See Note 12, Subsequent Events.    
Co-Chairman and Chief Executive Officer [Member] | Unsecured Non-convertible Promissory Note [Member]            
Related Party Transactions [Abstract]            
Non-convertible promissory note, principal amount     $ 2,862,000