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Inventories (Tables)
3 Months Ended
Dec. 31, 2020
Inventory Disclosure [Abstract]  
Net Inventories
Net inventories at December 31, 2020 and September 30, 2020 consist of the following:
 
     December 31, 2020      September 30, 2020  
Raw materials
   $ 25,430,000      $  14,607,000  
Work in process
     1,874,000        3,633,000  
Finished goods
     8,129,000        8,810,000  
Used equipment
     40,000        40,000  
    
 
 
    
 
 
 
     $ 35,473,000      $ 27,090,000