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Income Taxes (Tables)
6 Months Ended
Mar. 31, 2021
Income Tax Disclosure [Abstract]  
Schedule of Unrecognized Tax Benefits
A reconciliation of the beginning and ending amount of unrecognized tax benefits is (in thousands):
Unrecognized tax benefits as of September 30, 2020$2,600 
Decreases related to:
Expiration of statute of limitations(54)
Unrecognized tax benefits as of March 31, 2021$2,546