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Note 3 - Property and Equipment, Net (Tables)
6 Months Ended
Dec. 31, 2022
Notes Tables  
Property, Plant and Equipment [Table Text Block]
  

December 31,

  

June 30,

 
  

2022

  

2022

 
         

Land and building

 $1,250  $1,250 

Leasehold improvements

  1,371   1,371 

Machinery and equipment

  6,768   6,727 

Transportation equipment

  6   6 
   9,395   9,354 

Less: Accumulated depreciation and amortization

  (7,606)  (7,444)

Total

 $1,789  $1,910