CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Apr. 30, 2017	Jan. 31, 2016
Allowance for accounts receivable	$ 2,189	$ 3,346
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Class A Common Stock
Common Stock, par value	$ 0.0001	$ 0.0001
Common Stock, shares authorized	1,000,000,000	1,000,000,000
Common Stock, shares issued	77,966,000	67,831,000
Common Stock, shares outstanding	77,966,000	67,831,000
Class B Common Stock
Common Stock, par value	$ 0.0001	$ 0.0001
Common Stock, shares authorized	200,000,000	200,000,000
Common Stock, shares issued	54,807,000	62,780,000
Common Stock, shares outstanding	54,807,000	62,780,000