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Stock Options and Stock-based Compensation	3 Months Ended
Stock Options and Stock-based Compensation	Jul. 31, 2022
Equity [Abstract]
Stock Options and Stock-based Compensation	Stock Options and Stock-based Compensation The Company recognizes compensation costs related to stock options and other stock awards granted by the Company as operating expenses over their vesting period. In June 2022, the Company granted 54,279 RSUs under the 2017 Omnibus Incentive Plan ("2017 Plan"). These RSUs include a service component that vests over a three-year period. The recognized expense is based upon the vesting period for service criteria. The Company recorded stock-based compensation expense during the three months ended July 31, 2022 of $131,000, with the remaining estimated stock-based compensation expense of $1,424,000 to be recorded over the remaining vesting periods. The Company recorded stock-based compensation expense during the three months ended July 31, 2021 of $194,000. Directors' fees paid with shares of common stock in lieu of cash in accordance with Director compensation guidelines were $41,000 for each of the three month periods ended July 31, 2022 and July 31, 2021 and were also included in the stock-based compensation on the Condensed Consolidated Statements of Cash Flows.