10. SEGMENT AND GEOGRAPHIC INFORMATION (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2018 USD ($) segment	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)
Net revenues and long-lived assets by geographic area
Revenue, Net	$ 11,191	$ 11,118	$ 9,647	$ 10,687	$ 10,392	$ 11,484	$ 13,358	$ 12,946	$ 42,643	$ 48,180	$ 52,736
Property and equipment, net	8,172				7,689				$ 8,172	7,689
Number of reporting units | segment									1
United States
Net revenues and long-lived assets by geographic area
Revenue, Net									$ 20,690	19,708	20,951
Property and equipment, net	6,576				5,648				6,576	5,648
China
Net revenues and long-lived assets by geographic area
Revenue, Net									5,520	9,364	12,123
Singapore
Net revenues and long-lived assets by geographic area
Revenue, Net									6,878	9,475	7,345
Netherlands
Net revenues and long-lived assets by geographic area
Revenue, Net									4,375	4,728	7,124
Taiwan
Net revenues and long-lived assets by geographic area
Property and equipment, net	1,443				1,952				1,443	1,952
Israel
Net revenues and long-lived assets by geographic area
Property and equipment, net	$ 153				$ 89				153	89
Rest of the world
Net revenues and long-lived assets by geographic area
Revenue, Net									$ 5,180	$ 4,905	$ 5,193