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Share-Based Compensation - 2019 Stock-Based Incentive Compensation Plan (Details) - USD ($) |  | 12 Months Ended
--- | --- | ---
Aug. 27, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2019
Share-based compensation. |  |  |  |
Common stock, shares authorized |  | 75,000,000 | 75,000,000 |
Share-based compensation expense |  | $ 341,000 | $ 177,000 | $ 173,000
Options |  |  |  |
Outstanding at the beginning of the period (in shares) |  | 104,500 | 550,834 |
Outstanding at the end of the period (in shares) |  | 100,000 | 104,500 | 550,834
2019 Plan |  |  |  |
Share-based compensation. |  |  |  |
Common stock, shares authorized |  | 139,691 |  |
Number of shares of common stock reserved for awards |  | 750,000 |  |
Number of shares of common stock available for awards under the plan |  | 689,147 |  |
2019 Plan | Employee |  |  |  |
Share-based compensation. |  |  |  |
Number of shares of common stock reserved for awards |  | 300,000 |  |
2019 Plan | Employee and Non Employee Stock Option |  |  |  |
Share-based compensation. |  |  |  |
Share-based compensation expense |  | $ 181,000 | $ 17,000 | $ 0
Options |  |  |  |
Outstanding at the beginning of the period (in shares) |  | 100,000 |  |
Granted (in shares) |  | 100,000 |  | 100,000
Outstanding at the end of the period (in shares) |  | 100,000 | 100,000 |
Vested and expected to vest (in shares) |  | 100,000 |  |
Options exercisable at the end of the period (in shares) |  | 50,000 |  |
Weighted Average Exercise Price |  |  |  |
Outstanding at the beginning of the period (in dollars per share) |  | $ 7.10 |  |
Granted (in dollars per share) |  |  |  | $ 7.10
Outstanding at the end of the period (in dollars per share) |  | 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 |  |
2019 Plan | Employee and Non Employee Stock Option | Chief Financial Officer |  |  |  |
Options |  |  |  |
Granted (in shares) | 100,000 |  |  |

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- Definition Number of shares authorized for issuance under share-based payment arrangement. + 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 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=120381028&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 http://asc.fasb.org/extlink&oid=120381028&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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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