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Inventories (Tables)
 12 Months Ended
Sep. 30, 2022
Inventory Disclosure [Abstract]  
Net Inventories
Net inventories consist of the following:
 
     
                            
      
                            
  
 
  
September 30,
 
 
  
2022
 
  
2021
 
Raw materials
    $  31,975,000      $  25,858,000  
Work in process
      13,903,000        6,280,000  
Finished goods
      9,937,000        9,730,000  
Used equipment
      —          20,000  
    
 
 
     
 
 
  
Inventories, net
    $ 55,815,000      $  41,888,000