Property and Equipment, Net - Components of Property and Equipment, Net (Detail) - USD ($) $ in Thousands	Jul. 31, 2021	Jan. 31, 2021
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 81,992	$ 83,266
Less accumulated depreciation	(29,187)	(29,616)
Total property and equipment, net	52,805	53,650
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	3,040	3,040
Building
Property, Plant and Equipment [Line Items]
Property and equipment, gross	20,984	20,984
Land improvements and building improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	22,392	22,392
Equipment and computers
Property, Plant and Equipment [Line Items]
Property and equipment, gross	5,317	8,847
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	13,753	13,452
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	14,099	13,945
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 2,407	$ 606