Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 31, 2015
Accounts receivable, net of allowance	$ 944	$ 210
Convertible preferred stock, par value per share	$ 0.0001	$ 0.0001
Convertible preferred stock, shares authorized	0	123,879,952
Convertible preferred stock, shares issued	0	122,280,679
Convertible preferred stock, shares outstanding	0	122,280,679
Convertible preferred stock, aggregate liquidation preference	$ 0	$ 551,858
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	20,000,000	0
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, shares authorized	2,250,000,000	230,812,000
Common stock, shares issued	190,509,000	36,465,000
Common stock, shares outstanding	190,509,000	36,465,000
Class A Common Stock
Common stock, par value per share	$ 0.0001	$ 0.0001
Common stock, shares authorized	2,000,000,000	1,000
Common stock, shares issued	28,769,572	0
Common stock, shares outstanding	28,769,572	0
Class B Common Stock
Common stock, par value per share	$ 0.0001	$ 0.0001
Common stock, shares authorized	250,000,000	230,811,000
Common stock, shares issued	161,739,883	36,465,000
Common stock, shares outstanding	161,739,883	36,465,000