Organization, Consolidation and Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2021 USD ($) Customer Segment	Dec. 31, 2020 USD ($) Customer	Dec. 31, 2019 USD ($) Customer
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	true
Change in Accounting Principle, Accounting Standards Update, Adoption Date	Jan. 01, 2021
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]	true
Accounting Standard Update Extensible List	(ASU) 2019-12
Percentage of revenue accounted for by top 5 customers	12.00%	12.00%	11.00%
Number of customers accounting for more than 10% of revenue | Customer	0	0	0
Number of customers accounting for more than 10% of accounts receivable | Customer	0	0
Cash	$ 249,900,000
Cash equivalents	13,800,000
Long-term investments	0
Money market funds	10,000,000.0
Investments	0
Revenue recognized in the reporting period from performance obligations satisfied in prior periods	0
Revenue expected to be recognized from remaining performance obligations	$ 699,200,000
Remaining performance obligation, explanation	We expect to recognize revenue on approximately 40% of these remaining performance obligations over the next 24 months with the balance recognized thereafter.
Percentage of expected revenue recognition	40.00%
Allowance for doubtful accounts recorded to operations	$ 2,500,000	$ 3,500,000	$ 3,900,000
Revenue, practical expedient, remaining performance obligation, description	We apply the practical expedient to expense sales commissions when the amortization period would have been one year or less.
Amortization of sales commissions	$ 5,200,000	3,100,000	1,900,000
Impairment losses	0	0	0
Depreciation and amortization expense	7,914,000	8,946,000	7,987,000
Impairment charges of long-lived assets	0	0	0
Impairment charges of intangible assets	0	0	0
Goodwill, net	$ 62,239,000	62,252,000
Customer's license amortization period	5 years
Number of reportable segments | Segment	3
Advertising expense	$ 2,300,000	1,600,000
Office Equipment
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Property and equipment estimated useful life	5 years
Furniture and Fixtures
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Property and equipment estimated useful life	7 years
Leasehold Improvements
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Leasehold improvements useful life	lesser of their useful lives or the term of the lease.
Balance as of December 31, 2020
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Deferred revenue recognized	$ 107,800,000
Sales Commission
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Deferred commissions	23,200,000	12,900,000
Sales Commission | Other Assets
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Deferred commissions	16,900,000	9,200,000
Sales Commission | Prepaid Expenses
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Deferred commissions	6,300,000	3,700,000
Americas
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Accounts receivable, net	100,400,000	86,800,000
Depreciation and amortization expense	7,020,000	7,932,000	6,961,000
Goodwill, net	54,766,000	54,766,000
EMEA
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Accounts receivable, net	19,500,000	17,300,000
Depreciation and amortization expense	738,000	823,000	766,000
Goodwill, net	5,510,000	5,523,000
APAC
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Accounts receivable, net	4,500,000	5,100,000
Depreciation and amortization expense	156,000	191,000	260,000
Goodwill, net	1,963,000	1,963,000
India
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Certificates of deposit	3,800,000
Other (Loss) Income, Net
Organization Consolidation And Summary Of Significant Accounting Policies [Line Items]
Foreign exchange gain (loss)	$ (200,000)	$ (400,000)	$ (1,000,000.0)