Consolidated Balance Sheet Detail - Other Accrued Expenses (Detail) - USD ($) $ in Thousands	Jan. 31, 2018	Jan. 31, 2017
Balance Sheet Related Disclosures [Abstract]
Accrued compensation and commissions	$ 1,414	$ 1,799
Accrued bonuses	2,715	1,871
Accrued restructuring	225	1,023
Employee benefits	601	885
Sales tax and VAT payable	4,001	731
Income taxes payable	2,869	188
Accrued other	3,554	3,431
Total other accrued expenses	$ 15,379	$ 9,928