Equity - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended	12 Months Ended
	Jul. 31, 2021	Apr. 30, 2021	Jul. 31, 2021	Jan. 31, 2021
Shares Available for Grant
Shares available for grant, beginning (in shares)	45,574,269	32,871,367	32,871,367
Shares authorized (in shares)		14,395,880
Options canceled (in shares)	659,620	608,303
Shares available for grant, ending (in shares)	45,768,644	45,574,269	45,768,644	32,871,367
Number of Options Outstanding
Shares outstanding, beginning (in shares)	56,884,494	64,574,656	64,574,656
Options exercised (in shares)	(3,974,786)	(7,081,859)
Options canceled (in shares)	(659,620)	(608,303)
Shares outstanding, ending (in shares)	52,250,088	56,884,494	52,250,088	64,574,656
Weighted- Average Exercise  Price
Shares outstanding, beginning balance (in dollars per share)	$ 7.21	$ 7.04	$ 7.04
Options exercised (in dollars per share)	6.15	5.82
Options canceled (in dollars per share)	8.51	4.70
Shares outstanding, ending balance (in dollars per share)	$ 7.28	$ 7.21	$ 7.28	$ 7.04
Weighted-average remaining contractual life	7 years 3 months 18 days	7 years 6 months		7 years 8 months 12 days
Aggregate Intrinsic Value (in thousands)
Aggregate intrinsic value	$ 13,503,560	$ 12,763,483	$ 13,503,560	$ 17,138,896
Vested and exercisable (in shares)	24,701,078		24,701,078
Vested and exercisable, weighted average share price (in dollars per share)	$ 5.94		$ 5.94
Vested and exercisable, weighted average remaining contractual life			6 years 9 months 18 days
Vested and exercisable, aggregate intrinsic value	$ 6,416,925		$ 6,416,925
RSUs
Shares Available for Grant
RSU's granted (in shares)	(584,752)	(2,413,881)
RSU's forfeited (in shares)	119,507	112,600