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BENEFIT PLANS - Additional information (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Nov. 30, 2021 | Oct. 31, 2023 | Oct. 31, 2022 | Oct. 31, 2023 | Oct. 31, 2022
BENEFIT PLANS |  |  |  |  |
Decrease in pension liability, net of tax |  | $ 0 | $ 77,000 | $ 0 | $ 143,000
Stock-based compensation |  |  |  | 173,000 | 87,000
Board of Directors Chairman |  |  |  |  |
BENEFIT PLANS |  |  |  |  |
Director compensation non-cash expense |  | 23,000 | 23,000 | 45,000 | 45,000
Accrued compensation expense related to the deferred stock units |  |  |  | 75,000 | 75,000
Equity plan | President and Chief executive officer |  |  |  |  |
BENEFIT PLANS |  |  |  |  |
Stock option issued during the year | 50,000 |  |  |  |
Exercise price | $ 14.24 |  |  |  |
2016 Equity Plan | Board of Directors Chairman |  |  |  |  |
BENEFIT PLANS |  |  |  |  |
Non cash compensation expense |  | 13,000 | 12,000 | 25,000 | 25,000
Restricted stock | Equity plan |  |  |  |  |
BENEFIT PLANS |  |  |  |  |
Stock-based compensation |  | 42,000 | $ 51,000 | 103,000 | $ 87,000
Unrecognized compensation expense related to restricted shares |  | $ 242,000 |  | $ 242,000 |
Weighted-average remaining vesting period |  |  |  | 3 years |

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- Definition Amount of expense recognized from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments), awarded to key employees or individuals. Excludes amount related to plans that cover generally all employees (for example, but not limited to, qualified pension plans). + References No definition available. + Details
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