Stock-Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Jun. 26, 2019	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Award vesting period		4 years
Grants in period, weighted average grant date fair value (in USD per share)				$ 6.74
Exercised		$ 176,830	$ 142,900	$ 7,600
Total stock-based compensation expense		28,477	$ 25,208	$ 5,745
Executive Officer
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation arrangement by share-based payment award, options, options modified (in shares)	334,840
Stock Option
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Unrecognized compensation costs		$ 1,000
Unrecognized compensation costs period for recognition		1 year 21 days
Restricted Stock Units (RSUs)
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Award vesting period		4 years
Unrecognized compensation costs		$ 108,000
Unrecognized compensation costs period for recognition		3 years 5 months 26 days
Granted (in USD per share)		$ 60.99	$ 22.30	$ 21.75
Equity Instruments other than options, aggregate intrinsic value, vested		$ 12,200	$ 5,500	$ 0
Award vesting rights, percentage		25.00%
Total stock-based compensation expense			$ 12,200
Employee Stock
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Unrecognized compensation costs		$ 800
Minimum
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Purchase price of common stock, percent		100.00%
2014 Equity Incentive Plan
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Number of shares authorized (in shares)		15,025,666
2014 Equity Incentive Plan | Stock Option
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Award vesting period		4 years
Expiration period		10 years
2019 Equity Incentive Plan
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Award vesting period		4 years
2019 Equity Incentive Plan | Share-based Payment Arrangement
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Number of additional shares authorized (in shares)		15,250,000
Percent increase in aggregate shares		5.00%
Employee Stock Purchase Plan
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based payment arrangement, accelerated cost				$ 1,200
Employee Stock Purchase Plan | Employee Stock
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Number of shares authorized (in shares)		1,800,000
Purchase price of common stock, percent		85.00%
Percent increase in aggregate shares		1.00%
Number of shares available for grant		2,736,437