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COMPOSITION OF CERTAIN FINANCIAL STATEMENT ITEMS (Tables)
 3 Months Ended
Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of investments
          
   September 30, 2023   June 30,
2023		 
Current:          
Marketable equity securities – short-term   $1,010   $1,134 
Long-term:          
Warrant    3,670    6,160 
Marketable equity securities – long-term    1,422    1,361 
Total Investments   $6,102   $8,655 
Schedule of assumptions used
        
   September 30,
2023		  

June 30,

2023

 
Stock Price (common)   $2.60   $3.98 
Strike Price (common)   $.68   $.69 
Time until expiration (years)    2.22    2.48 
Volatility    60.0%   60.0%
Risk-free interest rate    5.03%   4.68%
Schedule of inventory
        
   September 30,
2023		   June 30,
2023		 
Raw materials/purchased components   $7,964   $8,824 
Work in process    4,516    3,686 
Sub-assemblies/finished components    2,146    2,387 
Finished goods    1,638    1,270 
         Total inventory   $16,264   $16,167 
Schedule of intangibles
        
   September 30,
2023		   June 30,
2023		 
Patent-related costs   $208   $208 
       Less accumulated amortization    (133)   (127)
   $75   $81