6. INVENTORIES (Details) - USD ($) $ in Thousands	Nov. 30, 2015	May. 31, 2015
Inventory, Net [Abstract]
Raw materials and sub-assemblies	$ 3,570	$ 4,018
Work-in-process	3,848	2,584
Finished goods	1	521
Inventory	$ 7,419	$ 7,123	[1]

[1] The condensed consolidated balance sheet at May 31, 2015 has been derived from the audited consolidated financial statements at that date.