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COMPOSITION OF CERTAIN FINANCIAL STATEMENT ITEMS (Tables)
6 Months Ended
Dec. 31, 2021
Composition Of Certain Financial Statement Items  
Schedule of inventory
          
   December 31, 
2021
   June 30, 
2021
 
Raw materials/purchased components   $4,331   $3,967 
Work in process    2,774    2,218 
Sub-assemblies/finished components    1,836    1,738 
Finished goods    344    514 
Total inventory   $9,285   $8,437 
Schedule of investments
          
   December 31,
2021
   June 30, 
2021
 
Marketable equity securities - short-term   $1,241   $1,295 
Marketable equity securities - long-term    1,940    1,704 
Total marketable equity securities   $3,181   $2,999 
Schedule of Capital Leased Assets
          
   December 31,
2021
   June 30, 
2021
 
Land   $3,684   $3,684 
Building    2,815    2,815 
Total    6,499    6,499 
Less: accumulated depreciation    (109)   (62)
 Land and building  $6,390   $6,437 
Schedule of intangibles
          
   December 31,
2021
   June 30,
2021
 
Patent-related costs   $238   $260 
Less accumulated amortization    (81)   (74)
   $157   $186