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Revenue Recognition and Related Costs (Tables)
 9 Months Ended
Jun. 30, 2019
Revenue from Contract with Customer [Abstract]  
Disaggregation of Company's Net Revenue by Major Source
The following table disaggregates the Company’s net revenue by major source for the quarter and nine months ended June 30, 2019:
 
  Quarter  Nine Months 
Equipment sales recognized over time
 $7,844,000  $36,203,000 
Equipment sales recognized at a point in time
  6,747,000   17,190,000 
Parts and component sales
  2,870,000   10,387,000 
Freight revenue
  1,312,000   2,744,000 
Other
  75,000   321,000 
  
 
 
  
 
 
 
Net revenue
 $18,848,000  $66,845,000