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OTHER ASSETS - Additional Information (Details) | 12 Months Ended
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Apr. 30, 2023 USD ($) ft² | Apr. 30, 2022 USD ($)
Office building |  |
OTHER ASSETS |  |
Area of Land | ft² | 7,000 |
Property and equipment | Right of use assets |  |
OTHER ASSETS |  |
Amortization of leased cost | $ 25,000 | $ 70,000
Right of use assets |  |
OTHER ASSETS |  |
Depreciation expense associated with property and equipment | $ 46,000 | $ 24,000

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