Segment, Geographical and Other Revenue Information - Revenues by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Total revenues	$ 14,967	$ 12,319	$ 29,637	$ 27,901
Americas [Member]
Segment Reporting Information [Line Items]
Total revenues	6,906	4,076	12,131	6,913
EMEA [Member]
Segment Reporting Information [Line Items]
Total revenues	3,314	4,741	9,285	12,466
APAC [Member]
Segment Reporting Information [Line Items]
Total revenues	$ 4,747	$ 3,502	$ 8,221	$ 8,522