Commitments and Contingencies (Additional Information) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Line of Credit Facility [Line Items]
Purchase obligation	$ 3,238,000
Increase in obligation of third year if a 10% increase in revenue	400,000
Rent expense	3,800,000	$ 2,100,000	$ 1,900,000
Operating rent expense, net of restructuring charges	1,500,000
Professional fees	$ 1,500,000	$ 400,000	$ 0
Capital leases, term of contract (in years)	4 years
Omtool, Ltd and Rightanswers, Inc. | Facility Closing
Line of Credit Facility [Line Items]
Restructuring charges	$ 2,300,000
Software Development Services | Investor
Line of Credit Facility [Line Items]
Purchase obligation	$ 3,200,000
Renewal term	1 year
Pro Forma
Line of Credit Facility [Line Items]
Purchase commitment	$ 3,600,000