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COMPOSITION OF CERTAIN FINANCIAL STATEMENT ITEMS (Inventory) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Jun. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Raw materials/purchased components $ 4,019 $ 4,241
Work in process 2,328 2,339
Sub-assemblies/finished components 2,226 1,438
Finished goods 579 220
Total inventory $ 9,152 $ 8,238