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Inventories (Tables)
9 Months Ended
Jun. 30, 2022
Inventory Disclosure [Abstract]  
Net Inventories
Net inventories at June 30, 2022 and September 30, 2021 consist of the following:
 
     June 30, 2022      September 30, 2021  
Raw materials
   $ 30,796,000      $ 25,858,000  
Work in process
     7,881,000        6,280,000  
Finished goods
     9,567,000        9,730,000  
Used equipment
     —          20,000  
    
 
 
    
 
 
 
     $ 48,244,000      $ 41,888,000