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Share-Based Compensation (Details Narrative) - USD ($) | 3 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jul. 31, 2023 | Jul. 31, 2022 | Apr. 30, 2023 | Jan. 31, 2023 | Feb. 09, 2022 | Feb. 08, 2022 | Jan. 18, 2018 | Dec. 31, 2015
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Unrecognized compensation cost related to non-vested stock | $ 600,000 |  |  |  |  |  |  |
Share-based compensation of weighted-average period | 1 year 10 months 24 days |  |  |  |  |  |  |
Shares outstanding | 1,448,984 |  | 1,529,185 |  |  |  |  |
Share-Based Payment Arrangement, Option [Member] |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Options unvested | 965,000 |  |  |  |  |  |  |
Weighted average remaining contractual term | 9 years 1 month 6 days |  |  |  |  |  |  |
Share-based payment arrangement, expense | $ 79,000 | $ 96,000 |  |  |  |  |  |
Performance Shares [Member] |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Share-based payment arrangement, expense | 43,000 | 53,000 |  |  |  |  |  |
Shares outstanding |  |  | 66,667 |  |  |  |  |
Restricted Stock [Member] |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Share-based payment arrangement, expense | $ 280,000 | $ 184,000 |  |  |  |  |  |
Share-based compensation of weighted-average period | 1 year 3 months 18 days |  |  |  |  |  |  |
Number of restricted shares, granted | 52,500 | 51,500 |  |  |  |  |  |
Unrecognized compensation cost | $ 844,000 |  |  |  |  |  |  |
2015 Omnibus Incentive Plan [Member] |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Share-based compensation arrangement shares authorized |  |  |  | 4,382,036 |  |  |  | 1,332,036
Share-based compensation arrangement shares aggregate increase |  |  |  | $ 3,050,000 |  |  |  |
Capital shares reserved for future issuance | 365,000 |  |  |  |  |  |  |
2018 Inducement Plan [Member] |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Share-based compensation arrangement shares authorized |  |  |  |  | 275,000 | 250,000 |  |
Capital shares reserved for future issuance |  |  |  |  |  |  | 25,000 |
Available for grant | 111,000 |  |  |  |  |  |  |

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