Basis of Presentation - Summary of Unrecognized Compensation Cost Related to Non-vested Awards Granted (Detail) $ in Thousands	Aug. 01, 2015 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 1,769
2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	644
2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	844
2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	277
2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 4