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Income Taxes (Details) - USD ($)
3 Months Ended 6 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2022
Mar. 31, 2021
Income Taxes        
Income tax expense $ 390,110 $ 20,165 $ 697,600 $ 29,662
Effective tax rate (as a percent) 21.40% 3.20% 21.40% 3.40%
Change in valuation allowance   $ (140,000)   $ (180,000)