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Income Taxes (Tables)
6 Months Ended
Mar. 31, 2021
Income Tax Disclosure [Abstract]  
Schedule of Calculation of the Effective Income Tax Rate
The calculation of the effective tax rate is as follows (in thousands):
 Three months ended March 31,Six months ended March 31,
 2021202020212020
Income (loss) before income taxes$(1,171)$9,555 $(1,430)$12,888 
Income tax provision (benefit)(946)2,134 (841)2,692 
Net income (loss)$(225)$7,421 $(589)$10,196 
Effective tax rate81 %22 %59 %21 %