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Inventories (Tables)
6 Months Ended
Mar. 31, 2020
Inventory Disclosure [Abstract]  
Net Inventories
Net inventories at March 31, 2020 and September 30, 2019 consist of the following:
 
   March 31, 2020   September 30, 2019 
Raw materials
  $15,155,000   $14,158,000 
Work in process
   3,092,000    1,397,000 
Finished goods
   8,776,000    9,811,000 
Used equipment
   40,000    —   
  
 
 
   
 
 
 
  $27,063,000   $25,366,000