Quarterly report pursuant to Section 13 or 15(d)

CONSOLIDATED BALANCE SHEETS (Parenthetical)

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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Jun. 30, 2020
Sep. 30, 2019
Statement of Financial Position [Abstract]    
Allowance for doubtful accounts receivable, current $ 13,031 $ 5,382
Common stock, shares authorized 100,000,000 100,000,000
Common stock, shares outstanding 61,313,000 63,979,000
Common stock, shares issued 61,313,000 63,979,000