Equity Plans and Stock-based Compensation - Narrative (Details) - USD ($) $ in Millions		1 Months Ended	9 Months Ended
	Feb. 25, 2021	Jun. 30, 2021	Oct. 31, 2021
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Common stock reserved (in shares)			111,132,060
Period for recognition (in years)			2 years 7 months 6 days
Unrecognized stock-based compensation cost			$ 125.2
Employee stock purchase plan
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Common stock reserved (in shares)			8,177,683
Eligible compensation per employee (as a percent)			15.00%
Offering period (in months)			24 months
Purchase period (in months)			6 months
Purchase price of common stock, percent of fair value			85.00%
Maximum number of shares to be purchased per employee (in shares)			10,000
Restricted stock units
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Common stock reserved (in shares)			3,906,058
Options to purchase common stock
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Common stock reserved (in shares)			24,855,043
2021 Equity Incentive Plan
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Possible increase in percent of outstanding shares (as a percent)	1.00%
Number of additional shares allowable under the plan (in shares)	5,400,000
Percent of outstanding shares (as a percent)	5.00%
2017 Stock Plan
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Common stock reserved (in shares)			21,412,248
2017 Stock Plan | Chief Executive Officer
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Number of stock options granted (in shares)		1,500,000
Unrecognized compensation expense			$ 31.7
2017 Stock Plan | Options to purchase common stock | Chief Executive Officer
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Period for recognition (in years)			2 years 3 months
2007 Stock Plan
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Common stock reserved (in shares)			3,442,795