Income Taxes - Components of Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Current:
State	$ 210	$ 56	$ 37
Foreign	2,198	1,073	162
Total	2,408	1,129	199
Deferred:
Foreign	(839)	208	92
Total provision for income taxes	$ 1,569	$ 1,337	$ 291