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Share-Based Compensation - 2019 Stock-Based Incentive Compensation Plan (Details) - USD ($) | 12 Months Ended
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Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2020
Share-Based Compensation |  |  |
Common stock, shares authorized | 75,000,000 | 75,000,000 |
Share-based compensation expense | $ 345,000 | $ 341,000 | $ 177,000
Options |  |  |
Outstanding at the beginning of the period (in shares) | 100,000 | 104,500 |
Outstanding at the end of the period (in shares) | 57,584 | 100,000 | 104,500
Stock Based Incentive Compensation Plan 2019 |  |  |
Share-Based Compensation |  |  |
Number of shares of common stock reserved for awards | 750,000 |  |
Common stock, shares authorized | 139,691 |  |
Number of shares of common stock available for awards under the plan | 653,836 |  |
Stock Based Incentive Compensation Plan 2019 | Employee |  |  |
Share-Based Compensation |  |  |
Number of shares of common stock reserved for awards | 300,000 |  |
Stock Based Incentive Compensation Plan 2019 | Employee and Non Employee Stock Option |  |  |
Share-Based Compensation |  |  |
Share-based compensation expense | $ 164,000 | $ 181,000 | $ 17,000
Options |  |  |
Outstanding at the beginning of the period (in shares) | 100,000 | 100,000 |
Granted (in shares) | 100,000 |  |
Exercised (in shares) | (42,416) |  |
Outstanding at the end of the period (in shares) | 57,584 | 100,000 | 100,000
Vested and expected to vest (in shares) | 57,584 |  |
Options exercisable at the end of the period (in shares) | 57,584 |  |
Weighted Average Exercise Price |  |  |
Outstanding at the beginning of the period (in dollars per share) | $ 7.10 | $ 7.10 |
Exercised (in dollars per share) | 8.26 |  |
Outstanding at the end of the period (in dollars per share) | 7.10 | $ 7.10 | $ 7.10
Vested and expected to vest (in dollars per share) | 7.10 |  |
Options exercisable at the end of the period (in dollars per share) | $ 7.10 |  |
Aggregate Intrinsic Value |  |  |
Exercised (in dollars) | $ 64,896 |  |
Outstanding at the end of the period (in dollars) | 88,104 |  |
Vested and expected to vest (in dollars) | 88,104 |  |
Options exercisable at the end of the period (in dollars) | $ 88,104 |  |

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + 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 (h)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The maximum number of common shares permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Number of shares authorized for issuance under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + 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)(iii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + 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)(iii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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