9. SEGMENT AND GEOGRAPHIC INFORMATION (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) segment	Sep. 30, 2016 USD ($)
Net revenues and long-lived assets by geographic area
Revenue, Net	$ 9,647	$ 13,358	$ 20,334	$ 26,304
Number of reportable business segments | segment			1
United States
Net revenues and long-lived assets by geographic area
Revenue, Net	4,710	5,430	$ 9,415	10,256
China
Net revenues and long-lived assets by geographic area
Revenue, Net	1,598	2,864	2,948	6,096
Singapore
Net revenues and long-lived assets by geographic area
Revenue, Net	1,498	2,261	3,700	5,556
Netherlands
Net revenues and long-lived assets by geographic area
Revenue, Net	782	1,585	1,984	1,963
Rest of the world
Net revenues and long-lived assets by geographic area
Revenue, Net	$ 1,059	$ 1,218	$ 2,287	$ 2,433