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Share-Based Compensation - Summary of Share Option Activity (Detail) - $ / shares
9 Months Ended 12 Months Ended
Nov. 04, 2015
Oct. 31, 2015
Sep. 02, 2015
Aug. 05, 2015
May. 20, 2015
Dec. 31, 2015
Mar. 31, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]              
Number of Share Options Outstanding, Beginning Balance           1,208,118  
Number of Share Options Outstanding, Granted 11,400 39,727 25,000 8,000 312,300 396,427  
Number of Share Options Outstanding, Exercised           (8,612)  
Number of Share Options Outstanding, Forfeited           (6,695)  
Number of Share Options Outstanding, Ending Balance           1,589,238 1,208,118
Number of Share Options Outstanding, Exercisable           634,466  
Weighted-Average Exercise Price, Beginning Balance           $ 5.58  
Weighted-Average Exercise Price, Granted           14.86  
Weighted-Average Exercise Price, Exercised           4.66  
Weighted-Average Exercise Price, Forfeited           12.08  
Weighted-Average Exercise Price, Ending Balance           7.87 $ 5.58
Weighted-Average Exercise Price, Exercisable           $ 4.13  
Weighted-Average Remaining Contractual Life, Outstanding           99 months 103 months
Weighted-Average Remaining Contractual Life, Granted           120 months  
Weighted-Average Remaining Contractual Life, Exercisable           91 months