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Stock Award Plans - Nonvested Stock Options (Details) - $ / shares | 12 Months Ended
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Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2020
Options Outstanding |  |  |
Outstanding at beginning of period (in shares) | 1,031,134 | 1,210,689 | 293,167
Granted (in shares) | 352,043 | 0 | 1,043,349
Vested (in shares) | (223,387) | 0 | 0
Forfeited (in shares) | (178,380) | (179,555) | (125,827)
Outstanding at end of period (in shares) | 981,410 | 1,031,134 | 1,210,689
Weighted Average Grant Date Fair Value |  |  |
Outstanding at beginning of period (in dollars per share) | $ 4.39 | $ 4.38 | $ 5.33
Granted (in dollars per share) | 7.18 | 0 | 4.17
Vested (in dollars per share) | 5.32 | 0 | 0
Forfeited (in dollars per share) | 5.02 | 4.31 | 4.83
Outstanding at end of period (in dollars per share) | $ 5.07 | $ 4.39 | $ 4.38

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- Definition Gross number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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