Commitments and Contingencies - Additional Information (Details) - USD ($)	1 Months Ended			12 Months Ended
	Apr. 30, 2020	Dec. 31, 2019	Dec. 31, 2018	Apr. 30, 2020
Commitments And Contingencies [Line Items]
Total purchase commitment, amount	$ 4,200,000
Letters of credit outstanding amount	$ 2,300,000			$ 2,300,000
Provision for indemnification claims				$ 0
Hosting Infrastructure Commitments
Commitments And Contingencies [Line Items]
Total purchase commitment, amount		$ 100,000,000.0	$ 60,000,000.0
Commitment period	3 years	4 years	3 years