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Equity Incentive Plans (Narrative) (Details) - USD ($) |  |  |  |  | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2023 | Jan. 31, 2023 | Sep. 30, 2022 | Jan. 12, 2022 | Mar. 31, 2024 | Mar. 31, 2023 | Apr. 27, 2023 | Apr. 26, 2018 | Apr. 28, 2011
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Expected future expenses relating to non-vested restricted shares |  |  |  |  | $ 642,000 |  |  |  |
Expected future compensation expense, weighted average period for recognition |  |  |  |  | 2 years 18 days |  |  |  |
Stock option expense |  |  |  |  | $ 39,000 | $ 33,000 |  |  |
Restricted stock expense |  |  |  |  | $ 156,000 | $ 73,000 |  |  |
Options [Member] |  |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Shares underlying unexercised options |  |  |  |  | 143,080 |  |  |  |
Expected future compensation expense, unexercised options |  |  |  |  | $ 237,000 |  |  |  |
Expected future compensation expense, weighted average period for recognition |  |  |  |  | 2 years 9 months 18 days |  |  |  |
Options exercisable - number of option shares |  |  |  |  | 752,895 |  |  |  |
2018 Equity Incentive Plan [Member] |  |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Shares authorized for issuance |  |  |  |  |  |  |  | 1,000,000 |
2023 Equity Incentive Plan [Member] |  |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Shares authorized for issuance |  |  |  |  |  |  | 1,000,000 |  |
2011 Stock Plan [Member] |  |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Shares authorized for issuance |  |  |  |  |  |  |  |  | 900,000
Directors [Member] | Restricted Stock [Member] |  |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Restricted stock issued |  | 27,000 |  | 33,000 |  |  |  |  |
Vesting period |  | 4 years |  | 4 years |  |  |  |  |
Executive Officers [Member] | Restricted Stock [Member] |  |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Restricted stock issued |  |  | 36,000 |  |  |  |  |  |
Director And Officer [Member] | Restricted Stock [Member] |  |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Restricted stock issued | 25,252 |  |  |  |  |  |  |  |

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