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3. CONTRACTS IN PROGRESS (Tables)
12 Months Ended
Aug. 31, 2018
Contractors [Abstract]  
Cost, estimated earnings and billings on uncompleted contracts
    2018     2017  
Revenues earned to date on uncompleted contracts   $ 11,794,764     $ 7,162,360  
Billings to date on uncompleted contracts     (10,193,771 )     (5,898,236 )
    $ 1,600,993     $ 1,264,124  
Schedule of contracts in progress
    2018     2017  
Revenues in excess of billings   $ 1,985,597     $ 1,481,082  
Billings in excess of revenues     (384,604 )     (216,958 )
    $ 1,600,993     $ 1,264,124