Segment, Geographical and Other Revenue Information - Revenues by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Schedule of revenues by geographical area
Revenue	$ 13,538	$ 10,347	$ 27,580	$ 18,317
Americas [Member]
Schedule of revenues by geographical area
Revenue	6,058	4,401	9,655	6,189
EMEA [Member]
Schedule of revenues by geographical area
Revenue	3,808	1,959	8,800	5,166
APAC [Member]
Schedule of revenues by geographical area
Revenue	3,672	3,987	9,125	6,962
Core Segment [Member]
Schedule of revenues by geographical area
Revenue	11,165	10,347	21,894	18,317
Core Segment [Member] | Americas [Member]
Schedule of revenues by geographical area
Revenue	6,058	4,401	9,655	6,189
Core Segment [Member] | EMEA [Member]
Schedule of revenues by geographical area
Revenue	1,435	1,959	3,114	5,166
Core Segment [Member] | APAC [Member]
Schedule of revenues by geographical area
Revenue	$ 3,672	$ 3,987	$ 9,125	$ 6,962