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COMPOSITION OF CERTAIN FINANCIAL STATEMENT ITEMS (Inventory) (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Jun. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Raw materials/purchased components $ 4,555 $ 4,241
Work in process 1,901 2,339
Sub-assemblies/finished components 1,661 1,438
Finished goods 251 220
Total inventory $ 8,368 $ 8,238