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Inventories (Tables)
9 Months Ended
Jun. 30, 2019
Inventory Disclosure [Abstract]  
Net Inventories
Net inventories at June 30, 2019 and September 30, 2018 consist of the following:
 
  June 30, 2019  September 30, 2018 
Raw materials
 $12,352,000  $11,254,000 
Work in process
  322,000   1,020,000 
Finished goods
  7,305,000   5,924,000 
Used equipment
  16,000   16,000 
  
 
 
  
 
 
 
  $19,995,000  $18,214,000