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Earnings Per Share - Additional Information (Details) - shares | Sep. 30, 2021 | Sep. 30, 2020
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Stock Option |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Stock options, outstanding | 417,000 | 554,500
Options exercisable | 116,000 | 419,500
Restricted Stock |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Restricted stock, outstanding | 101,250 | 209,000

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