Revenue Recognition - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation Of Revenue [Line Items]
Receivables related to service	$ 2,000,000.0
Sales commissions current	9,900,000	$ 6,500,000	$ 2,429,000
Deferred sales commissions noncurrent	14,200,000	10,300,000
Amortization expense for the deferred costs	8,000,000.0	5,500,000	$ 5,900,000
Impairment loss related to costs capitalized	0
Subscription Services
Disaggregation Of Revenue [Line Items]
Revenue recognized	86,200,000	$ 62,500,000
Revenue remaining performance obligation	290,800,000
Professional Services
Disaggregation Of Revenue [Line Items]
Revenue recognized	6,000,000.0
Revenue remaining performance obligation	$ 6,900,000