Balance Sheet Components - Schedule of Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 31, 2015
Payables And Accruals [Abstract]
Sales and use tax payable	$ 299	$ 591
Accrued professional fees	3,044	1,502
Accrued travel and entertainment expenses	2,182	1,138
Income tax payable	1,791	779
Other accrued liabilities	6,760	2,096
Total accrued expenses and other liabilities	$ 14,076	$ 6,106