Equity Incentive Plans - Schedule of 2019 Plan Activity (Details) - 2019 Equity Incentive Plan	6 Months Ended
	Jul. 31, 2020 shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding [Roll Forward]
Equity Incentive Plan Shares, beginning balance (in shares)	23,050,732
Shares authorized (in shares)	6,617,320
Options and RSUs granted (in shares)	(3,491,910)
Cancelled shares (in shares)	944,366
Equity Incentive Plan Shares, ending balance (in shares)	27,120,508