Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Summary Of Significant Accounting Policies [Line Items]
Deferred commissions, amortization period	4 years
Amortization of deferred commissions	$ 6,900	$ 4,200	$ 2,700
Impairment loss related to deferred commissions	0	0	0
Bad debt expense	1,248	1,352	432
Accounts receivable write-off	900	1,000	400
Cash and cash equivalents held in one financial institution	305,525	224,390
Impairment of long-lived assets		0	0
Impairment of operating lease right-of-use asset	500
Impairment of goodwill	0	0	0
Private company investment	3,600	3,600
Observable price changes for private company investment	0	0	0
Liability for sabbatical leave, accrued balance	6,500	5,500
Advertising and promotion costs	$ 68,500	44,600	30,300
Sale of private company investment, period of contingent consideration to be received	3 years
Earn-out payment received		1,000	$ 1,000
Accrued Compensation
Summary Of Significant Accounting Policies [Line Items]
Liability for sabbatical leave, accrued balance	$ 3,100	2,300
Other Non-Current Liabilities
Summary Of Significant Accounting Policies [Line Items]
Liability for sabbatical leave, accrued balance	$ 3,400	$ 3,200
ASC 842 | Minimum
Summary Of Significant Accounting Policies [Line Items]
Operating lease terms	1 year
ASC 842 | Maximum
Summary Of Significant Accounting Policies [Line Items]
Operating lease terms	12 years
Capitalized Internal-Use Software
Summary Of Significant Accounting Policies [Line Items]
Intangible assets estimated useful life	3 years
Customer Concentration Risk | Sales Revenue, Net
Summary Of Significant Accounting Policies [Line Items]
Concentration of credit risk, customer	No single customer accounted for more than 10% of revenue	No single customer accounted for more than 10% of revenue	No single customer accounted for more than 10% of revenue
Customer Concentration Risk | Accounts Receivable
Summary Of Significant Accounting Policies [Line Items]
Concentration of credit risk, customer	No customers accounted for more than 10% of accounts receivable, net	No customers accounted for more than 10% of accounts receivable, net
Cash and Cash Equivalents Held in One Financial Institution
Summary Of Significant Accounting Policies [Line Items]
Cash and cash equivalents held in one financial institution	$ 271,900
Equity Incentive Plans | Time-Based Awards | New Hires
Summary Of Significant Accounting Policies [Line Items]
Stock-based compensation, requisite service period	4 years
Equity Incentive Plans | Time-Based Awards | Existing Employees
Summary Of Significant Accounting Policies [Line Items]
Stock-based compensation, requisite service period	3 years