Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Oct. 31, 2016	Jan. 31, 2016
Allowance for doubtful accounts	$ 651	$ 542
Class A common stock [Member]
Common stock, par value	$ 0.00001	$ 0.00001
Common stock, shares authorized	800,000,000	800,000,000
Common stock, shares issued	102,446,478	87,359,026
Common stock, shares outstanding	102,446,478	87,359,026
Class B common stock [Member]
Common stock, par value	$ 0.00001	$ 0.00001
Common stock, shares authorized	190,000,000	190,000,000
Common stock, shares issued	34,325,912	46,186,159
Common stock, shares outstanding	34,325,912	46,186,159