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Accounts Receivable	9 Months Ended
Accounts Receivable	Jun. 30, 2018
Receivables [Abstract]
Accounts Receivable	3.Accounts Receivable Accounts receivable of $343,565 and $330,173, is net of an allowance for doubtful accounts of $7,278 and $8,350 and includes amounts of retention on incomplete projects to be completed within one year of $37,432 and $39,678 at June 30, 2018 and September 30, 2017, respectively.