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Inventories (Tables)
9 Months Ended
Jun. 30, 2021
Inventory Disclosure [Abstract]  
Net Inventories
Net inventories at June 30, 2021 and September 30, 2020 consist of the following:
 
     June 30, 2021      September 30, 2020  
Raw materials
   $ 27,057,000      $  14,607,000  
Work in process
     7,179,000        3,633,000  
Finished goods
     6,556,000        8,810,000  
Used equipment
     40,000        40,000  
    
 
 
    
 
 
 
     $ 40,832,000      $ 27,090,000