Acquisitions - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended			12 Months Ended
	Oct. 31, 2018	Sep. 30, 2018	Jan. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Payment related to contingent consideration				$ 487	$ 0	$ 0
Goodwill acquired in acquisition					14,606
Intangible assets acquired				50,906	$ 50,002
AdvantageTec
Business Acquisition [Line Items]
Aggregate purchase price	$ 11,200
Cash payment in acquisition	6,000
Equity consideration in acquisition	4,300
Potential earn-out consideration payments based on achieving targets	900			400
Goodwill acquired in acquisition	9,100
Intangible assets acquired	$ 2,200
Conversable Inc
Business Acquisition [Line Items]
Aggregate purchase price		$ 5,700
Cash payment in acquisition		1,300
Equity consideration in acquisition		2,900
Potential earn-out consideration payments based on achieving targets		1,500
Goodwill acquired in acquisition		5,500
Intangible assets acquired		500
Assets acquired liabilities assumed, net liability		$ (300)
BotCentral
Business Acquisition [Line Items]
Equity consideration in acquisition			$ 1,000
Business acquisition transaction costs			200
Intangible assets acquired			$ 200
Contingent earn-out
Business Acquisition [Line Items]
Payment related to contingent consideration				500
Contingent earn-out | AdvantageTec
Business Acquisition [Line Items]
Fair value adjustments				168
Contingent earn-out | Conversable Inc
Business Acquisition [Line Items]
Fair value adjustments				$ (496)