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Share-Based Compensation (Details Narrative) - USD ($) | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 31, 2023 | Jan. 31, 2024 | Jan. 31, 2023 | Jan. 31, 2024 | Jan. 31, 2023 | Apr. 30, 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 |  | $ 207,000 |  | $ 207,000 |  |  |  |  |  |
Share-based compensation of weighted-average period |  |  |  | 1 year 7 months 6 days |  |  |  |  |  |
Shares outstanding |  | 843,989 |  | 843,989 |  | 1,529,185 |  |  |  |
Share-Based Payment Arrangement, Option [Member] |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Options unvested |  | 284,000 |  | 284,000 |  |  |  |  |  |
Weighted average remaining contractual term |  |  |  | 8 years 8 months 12 days |  |  |  |  |  |
Share-based payment arrangement, expense |  | $ (49,000) | $ 62,000 | $ 50,000 | $ 230,000 |  |  |  |  |
Performance Shares [Member] |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Share-based payment arrangement, expense |  | 0 | 31,000 | 43,000 | 132,000 |  |  |  |  |
Shares outstanding |  |  |  |  |  | 66,667 |  |  |  |
Restricted Stock [Member] |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Share-based payment arrangement, expense |  | 179,000 | $ 185,000 | $ 710,000 | $ 549,000 |  |  |  |  |
Share-based compensation of weighted-average period |  |  |  | 1 year 3 months 18 days |  |  |  |  |  |
Number of restricted shares, granted |  |  |  | 183,000 | 1,609,000 |  |  |  |  |
Unrecognized compensation cost |  | $ 392,000 |  | $ 392,000 |  |  |  |  |  |
Shares withheld for tax withholdings, shares |  |  |  | 47,103 |  |  |  |  |  |
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 |  | 4,382,036 |  | 4,382,036 |  |  |  |  | 1,332,036
Share-based compensation arrangement shares aggregate increase | 3,050,000 |  |  |  |  |  |  |  |  |
Capital shares reserved for future issuance |  | 1,167,000 |  | 1,167,000 |  |  |  |  |  |
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 |  | 111,000 |  |  |  |  |  |

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