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Share-Based Compensation (Details Narrative) - USD ($) | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Oct. 31, 2022 | Oct. 31, 2021 | Oct. 31, 2022 | Oct. 31, 2021 | Feb. 09, 2022 | Feb. 08, 2022 | Jan. 18, 2018 | Dec. 31, 2015
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of restricted shares, granted |  |  | 52,500 | 33,333 |  |  |  |
Share-Based Payment Arrangement, Option [Member] |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based payment award, options, outstanding, intrinsic value | $ 0 |  | $ 0 |  |  |  |  |
Options, number of shares unvested | 696,000 |  | 696,000 |  |  |  |  |
Weighted average remaining contractual term |  |  | 9 years 2 months 12 days |  |  |  |  |
Share-based payment arrangement, expense | $ 72,000 | $ 5,000 | $ 168,000 | $ 115,000 |  |  |  |
Non-vested Stock [Member] |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Unrecognized compensation cost | $ 600,000 |  | $ 600,000 |  |  |  |  |
Share-based compensation of weighted-average period |  |  | 2 years 1 month 6 days |  |  |  |  |
Performance Shares [Member] |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Options, number of shares unvested | 202,000 |  | 202,000 |  |  |  |  |
Weighted average remaining contractual term |  |  | 8 years 3 months 18 days |  |  |  |  |
Share-based payment arrangement, expense | $ 48,000 | (34,000) | $ 101,000 | 61,000 |  |  |  |
Unrecognized compensation cost | 100,000 |  | $ 100,000 |  |  |  |  |
Share-based compensation of weighted-average period |  |  | 4 months 24 days |  |  |  |  |
Options, outstanding, intrinsic value | 0 |  | $ 0 |  |  |  |  |
Restricted Stock [Member] |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Share-based payment arrangement, expense | 180,000 | $ 143,000 | $ 364,000 | $ 29,000 |  |  |  |
Share-based compensation of weighted-average period |  |  | 1 year 8 months 12 days |  |  |  |  |
Unrecognized compensation cost | $ 636,000 |  | $ 636,000 |  |  |  |  |
2015 Omnibus Incentive Plan [Member] |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Share-based compensation arrangement shares authorized |  |  |  |  |  |  |  | 1,332,036
2015 Omnibus Incentive Plan [Member] | Chief Executive Officer [Member] |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Capital shares reserved for future issuance | 830,000 |  | 830,000 |  |  |  |  |
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 | 211,000 |  | 211,000 |  |  |  | 25,000 |

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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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