Significant Customer and Geographic Information - Revenues by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Schedule of revenues by geographical area
Total revenues	$ 9,984	$ 14,870	$ 28,301	$ 38,868
United States [Member]
Schedule of revenues by geographical area
Total revenues	3,597	10,356	9,695	15,458
Singapore [Member]
Schedule of revenues by geographical area
Total revenues	875	792	4,369	2,912
India [Member]
Schedule of revenues by geographical area
Total revenues	1,273	714	3,548	2,760
Other Asian Countries [Member]
Schedule of revenues by geographical area
Total revenues	816	245	2,008	740
United Kingdom [Member]
Schedule of revenues by geographical area
Total revenues	2	145	46	10,726
Switzerland [Member]
Schedule of revenues by geographical area
Total revenues	826	937	3,154	1,555
Slovenia [Member]
Schedule of revenues by geographical area
Total revenues	0	79	1,632	823
Ireland [member]
Schedule of revenues by geographical area
Total revenues	2,240	1,505	2,526	1,505
Other European Countries [Member]
Schedule of revenues by geographical area
Total revenues	347	80	1,224	621
Others [Member]
Schedule of revenues by geographical area
Total revenues	$ 8	$ 17	$ 99	$ 1,768