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Schedule of Accrued Expenses (Details) - USD ($) $ in Thousands | Jul. 31, 2022 | Apr. 30, 2022
--- | --- | ---
Payables and Accruals [Abstract] |  |
Project costs | $ 100 | $ 59
Contract loss reserve | 435 | 328
Employee incentive payments | 355 | 266
Accrued salary and benefits | 31 | 60
Legal and accounting fees | 24 | 30
Other | 145 | 134
Accrued expenses total | $ 1,090 | $ 877

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