Property and Equipment, Net - Components of Property and Equipment, Net (Detail) - USD ($) $ in Thousands	Apr. 30, 2016	Jan. 31, 2016
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 53,226	$ 51,816
Less accumulated depreciation	(5,567)	(4,347)
Total property and equipment, net	47,659	47,469
Land [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	3,040	3,040
Building [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	20,984	20,984
Land improvements and building improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	14,141	14,106
Equipment and computers [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	6,430	5,910
Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	6,735	6,453
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,768	$ 1,323
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 128