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Related Party Transactions - Additional Information (Detail) - USD ($)
$ in Millions
1 Months Ended
Feb. 29, 2016
Feb. 28, 2015
Apr. 30, 2016
Mr.Lloyd Frink      
Related Party Transaction [Line Items]      
Reimbursement of costs incurred $ 0.2    
Mr.Richard Barton      
Related Party Transaction [Line Items]      
Reimbursement of costs incurred $ 0.2    
Payment of filing fees   $ 0.3  
Accrual gross-up payment     $ 0.1