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Stock Options and Share-based Compensation
 6 Months Ended
Oct. 31, 2020
Equity [Abstract]  
Stock Options and Share-based Compensation Stock Options and Share-based Compensation
Compensation costs related to stock options and other stock awards granted by the Company are charged against operating expenses during their vesting period, under ASC 718, "Compensation-Stock Compensation."
In May 2020, the Company granted 12,045 RSUs under the 2017 Omnibus Incentive Plan ("2017 Plan"). These RSUs include a
service component that vests over a one-year period. The Company granted 83,816 RSUs under the 2017 Omnibus Incentive Plan in June 2020. These RSUs include both a service and a performance component, vesting over a three-year period. The recognized expense is based upon the vesting period for service criteria and estimated attainment of the performance criteria at the end of the three-year period, based on the ratio of cumulative days of service to total days over the three-year period. The Company recorded share-based compensation expense during the three and six months ended October 31, 2020 of $141,000 and $200,000, respectively, with the remaining estimated share-based compensation expense of $990,000 to be recorded over the remaining vesting periods. The Company recorded share-based compensation expense during the three and six months ended October 31, 2019 of $41,000 and $82,000, respectively.