Business Combination (Details) - USD ($)						12 Months Ended
	Jan. 10, 2019	Oct. 16, 2018	Apr. 01, 2018	Nov. 28, 2017	Aug. 29, 2017	Dec. 31, 2019	Dec. 31, 2017	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill						$ 7,447,000	$ 1,549	$ 7,225,000
Adya
Business Acquisition [Line Items]
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	$ 200,000
Business Combination, Contingent Consideration Arrangements, Period Before Due	18 months
Purchased Intangible Assets	$ 900,000
Goodwill	100,000
Total purchase price	$ 1,000,000
Layered Insight
Business Acquisition [Line Items]
Purchased Intangible Assets		$ 9,600,000
Goodwill		5,498,000
Total purchase price		13,434,000
Reserve fund						1,600,000
Business Combination, Additional Consideration		4,000,000.0
Business Combination, Earnout Milestone		$ 1,500,000
Estimated useful life of technology-based intangible assets		4 years
1Mobility
Business Acquisition [Line Items]
Purchased Intangible Assets			$ 3,700,000
Goodwill			300,000
Total purchase price			$ 4,000,000
Reserve fund						600,000
Estimated useful life of technology-based intangible assets			4 years
Nevis
Business Acquisition [Line Items]
Purchased Intangible Assets					$ 5,156,000
Goodwill					583,000
Total purchase price					$ 5,753,000
NetWatcher
Business Acquisition [Line Items]
Purchased Intangible Assets				$ 7,000,000
Goodwill				649,000
Total purchase price				$ 7,729,000
Reserve fund						$ 1,000,000.0
Estimated useful life of technology-based intangible assets							5 years