Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jul. 31, 2019	Jan. 31, 2019
Allowance for doubtful accounts	$ 222	$ 468
Class A common stock
Class A common stock, $0.00001 par value; 800,000,000 shares authorized, 131,368,003 and 125,980,019 issued and outstanding at July 31, 2019 and January 31, 2019, respectively	$ 1	$ 1
Common stock, par value (in usd per share)	$ 0.00001	$ 0.00001
Common stock, shares authorized (in shares)	800,000,000	800,000,000
Common stock, shares issued (in shares)	131,368,003	125,980,019
Common stock, shares outstanding (in shares)	131,368,003	125,980,019
Class B common stock
Class A common stock, $0.00001 par value; 800,000,000 shares authorized, 131,368,003 and 125,980,019 issued and outstanding at July 31, 2019 and January 31, 2019, respectively	$ 0	$ 0
Common stock, par value (in usd per share)	$ 0.00001	$ 0.00001
Common stock, shares authorized (in shares)	190,000,000	190,000,000
Common stock, shares issued (in shares)	16,480,631	20,210,060
Common stock, shares outstanding (in shares)	16,480,631	20,210,060