Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Apr. 30, 2014	Jan. 31, 2014
Allowance for doubtful accounts	$ 317	$ 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	38,301,754	15,044,750
Common stock, shares outstanding	38,301,754	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	89,271,904	109,746,795
Common stock, shares outstanding	89,271,904	109,746,795