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Share-Based Compensation - Summary of Share Option Activity (Detail) - $ / shares
9 Months Ended 12 Months Ended
Nov. 02, 2016
Oct. 31, 2016
Aug. 10, 2016
Jun. 01, 2016
Dec. 31, 2016
Mar. 31, 2016
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]            
Number of Share Options Outstanding, Beginning Balance         1,589,938  
Number of Share Options Outstanding, Granted 3,600 61,082 11,250 214,700 290,632  
Number of Share Options Outstanding, Exercised         (2,560)  
Number of Share Options Outstanding, Forfeited         (51,420)  
Number of Share Options Outstanding, Ending Balance         1,826,590 1,589,938
Number of Share Options Outstanding, Exercisable         1,082,045  
Weighted-Average Exercise Price, Beginning Balance         $ 7.86  
Weighted-Average Exercise Price, Granted         10.32  
Weighted-Average Exercise Price, Exercised         1.44  
Weighted-Average Exercise Price, Forfeited         12.57  
Weighted-Average Exercise Price, Ending Balance         8.13 $ 7.86
Weighted-Average Exercise Price, Exercisable         $ 6.03  
Weighted-Average Remaining Contractual Life, Outstanding         91 months 96 months
Weighted-Average Remaining Contractual Life, Granted         120 months  
Weighted-Average Remaining Contractual Life, Exercisable         83 months