CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Apr. 30, 2020	Jan. 31, 2020
Accounts receivable, allowances	$ 11,990	$ 7,634
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	200,000,000	200,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Class A Common Stock
Common stock, shares authorized (in shares)	2,000,000,000	2,000,000,000
Common stock, shares issued (in shares)	167,647,512	123,391,114
Common stock, shares outstanding (in shares)	167,647,512	123,391,114
Class B Common Stock
Common stock, shares authorized (in shares)	300,000,000	300,000,000
Common stock, shares issued (in shares)	114,344,499	155,336,747
Common stock, shares outstanding (in shares)	114,344,499	155,336,747