Property and Equipment - Additional Information (Detail) - USD ($)	12 Months Ended
	Feb. 02, 2019	Feb. 03, 2018	Jan. 28, 2017
Property Plant And Equipment [Abstract]
Capitalized software, subject to amortization on cost basis, included in property and equipment	$ 33,200,000	$ 22,100,000
Capitalized software, accumulated amortization	14,300,000	9,000,000
Total depreciation expense	24,400,000	21,100,000	$ 20,400,000
Impairment charges	0	2,200,000	0
Interest cost capitalized in connection with construction in progress	$ 400,000	$ 600,000	$ 500,000