Revenue Recognition - Impacts of Adopting New Revenue Standard on Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands	Jan. 31, 2019	Feb. 01, 2018	Jan. 31, 2018
Assets:
Deferred tax assets, non-current	$ 10,587		$ 3,642
Liabilities:
Accounts payable	12,801		19,815
Accrued and other current liabilities	24,700		32,178
Income taxes payable	993		936
Deferred revenue, current	529		307
Other long-term liabilities	8,341		11,226
Equity:
Retained earnings	230,861		$ 261,265
Topic 606 [Member]
Liabilities:
Deferred revenue, current		$ 264
Equity:
Retained earnings		261,308
Topic 606 [Member] | Impact of Adoption [Member]
Assets:
Deferred tax assets, non-current	34
Liabilities:
Accounts payable	(150)
Accrued and other current liabilities	(32)
Income taxes payable	1
Deferred revenue, current	4,957	(43)
Other long-term liabilities	3
Equity:
Retained earnings	(4,745)	$ 43
Topic 606 [Member] | Amounts under ASC 605 [Member]
Assets:
Deferred tax assets, non-current	10,621
Liabilities:
Accounts payable	12,651
Accrued and other current liabilities	24,668
Income taxes payable	994
Deferred revenue, current	5,486
Other long-term liabilities	8,344
Equity:
Retained earnings	$ 226,116