Revenue Recognition - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Disaggregation Of Revenue [Line Items]
Period of benefit for amortization costs	4 years
Deferred sales commissions current	$ 14,500,000	$ 9,900,000			$ 2,429,000
Deferred sales commissions noncurrent	15,900,000	14,200,000
Amortization expense for the deferred costs	12,600,000	8,000,000.0	$ 5,500,000
Impairment loss related to costs capitalized	0
Subscription Services, License and other
Disaggregation Of Revenue [Line Items]
Revenue recognized	123,300,000	86,200,000	$ 62,500,000
Professional Services
Disaggregation Of Revenue [Line Items]
Revenue recognized	6,600,000	$ 6,000,000.0
Revenue remaining performance obligation	16,500,000
Subscription Services And License
Disaggregation Of Revenue [Line Items]
Revenue remaining performance obligation	$ 358,400,000
Accounting Standards Update 2014-09
Disaggregation Of Revenue [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	true
Change in Accounting Principle, Accounting Standards Update, Adoption Date	Jan. 01, 2018
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]	true
Change in Accounting Principle, Accounting Standards Update, Transition Option Elected [Extensible List]	us-gaap:AccountingStandardsUpdate201409RetrospectiveMember
Deferred sales commissions current				$ 4,561,000
Deferred sales commissions noncurrent				$ 6,965,000