Stockholders' Equity - Additional Information (Details) - $ / shares	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020
Class Of Stock [Line Items]
Common Stock, shares authorized	1,000,000,000	1,000,000,000
Common Stock, par value	$ 0.0001	$ 0.0001
Common Stock, shares issued	159,851,000	150,611,000
Common Stock, shares outstanding	159,851,000	150,611,000
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Treasury Stock, shares	3,052,953	3,052,953
Class A Common Stock
Class Of Stock [Line Items]
Common stock, voting rights	1 vote per share
Common Stock, shares authorized	1,000,000,000	1,000,000,000
Common Stock, par value	$ 0.0001	$ 0.0001
Common Stock, shares issued	159,850,663	150,611,405
Common Stock, shares outstanding	159,850,663	150,611,405