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Costs and Estimated Earnings in Excess of Billings (Tables)
9 Months Ended
Jun. 30, 2020
Text Block [Abstract]  
Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts
Costs and estimated earnings in excess of billings on uncompleted contracts as of June 30, 2020 and September 30, 2019 consist of the following:
 
June 30,
 
2020
   
September 30,
 
2019
 
Costs incurred on uncompleted contracts
  $
13,792,000
    $
18,707,000
 
Estimated earnings
   
5,555,000
     
9,063,000
 
                 
   
19,347,000
     
27,770,000
 
Billings to date
   
9,283,000
     
13,932,000
 
                 
Costs and estimated earnings in excess of billings
  $
10,064,000
    $
13,838,000