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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS
 12 Months Ended
Sep. 30, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS
The following table sets forth activities in our allowance for doubtful accounts:
Allowance For Doubtful AccountsBalance At
Beginning of
Year		Amount of Charge
(Benefit) To
Expenses		Deductions
and
Adjustments		Balance At
End
of Year
Year ended:
September 30, 2020$2,377 $(1,122)$(672)$583 
September 30, 20191,900 432 45 2,377 
September 30, 20181,747 185 (32)1,900 
We have provided a valuation allowance on certain deferred tax assets. The following table sets forth activities in our valuation allowance:
Valuation AllowanceBalance At
Beginning
of Year		Amounts
Charged To
Expenses		Deductions
and
Adjustments		Balance At
End
of Year
Year ended:
September 30, 2020$2,565 $658 $(275)$2,948 
September 30, 2019133 2,432 — 2,565 
September 30, 20182,271 — (2,138)133