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COMPOSITION OF CERTAIN FINANCIAL STATEMENT ITEMS (Inventory) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Raw materials/purchased components $ 3,649 $ 3,132
Work in process 2,394 1,511
Sub-assemblies/finished components 1,586 1,524
Finished goods 179 72
Total inventory $ 7,808 $ 6,239