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COMPOSITION OF CERTAIN FINANCIAL STATEMENT ITEMS (Inventory) (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Jun. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Raw materials /purchased components $ 2,099 $ 1,878
Work in process 1,431 974
Sub-assemblies /finished components 1,157 1,193
Finished goods 118 348
Total inventory $ 4,805 $ 4,393