Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jan. 31, 2015	Jan. 31, 2014
Allowance for doubtful accounts	$ 413	$ 305
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	64,729,479	15,044,750
Common stock, shares outstanding	64,729,479	15,044,750
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	66,338,146	109,746,795
Common stock, shares outstanding	66,338,146	109,746,795