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Income Taxes
 9 Months Ended
Jun. 30, 2021
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
The calculation of the effective tax rate is as follows (in thousands):
 Three months ended June 30,Nine months ended June 30,
 2021202020212020
Income (loss) before income taxes$(1,338)$2,922 $(2,767)$15,810 
Income tax provision (benefit)703 (559)(138)2,133 
Net income (loss)$(2,041)$3,481 $(2,629)$13,677 
Effective tax rate(53)%(19)%5 %13 %
 
For the three months ended June 30, 2021, the income tax provision resulted in a negative effective tax rate for the period due to our inability to recognize a tax benefit related to losses in the United Kingdom and the change in the estimated relative amounts of income/loss recognized in the various tax jurisdictions. These items also reduced the tax benefit for the nine months ended June 30, 2021. The estimated Research and Development Tax Credit (R&D Tax Credit) as well as the utilization of net operating loss carryforwards in Canada that were fully reserved with a valuation allowance provided a tax benefit for the three and nine months ended June 30, 2021.

The effective tax rate for the quarter ended June 30, 2020 was favorably impacted by the tax benefits related to the R&D Tax Credit as well as the projected utilization of net operating loss carryforwards in Canada that were fully reserved with a valuation allowance. In addition, as a result of the expiration of certain U.S. federal statutes of limitations and the effective settlement of an Internal Revenue Service (IRS) audit, $1.7 million of reserves for unrecognized tax benefits related to these matters was released. These benefits were partially offset by losses recognized by various foreign jurisdictions that were reserved with a valuation allowance. For the nine months ended June 30, 2020, the effective tax rate was also negatively impacted by the $0.5 million valuation allowance recorded against our UK deferred tax assets as a discrete item during the second quarter of Fiscal 2020.