Income Taxes - Components of Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Current:
State	$ 389	$ 210	$ 56
Foreign	1,806	2,198	1,073
Total	2,195	2,408	1,129
Deferred:
Foreign	(308)	(839)	208
Provision for income taxes	$ 1,887	$ 1,569	$ 1,337