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Schedule of Accounts Receivable, Contract Assets and Contract Liabilities (Details) - USD ($) $ in Thousands | Jan. 31, 2024 | Apr. 30, 2023 | Apr. 30, 2022
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Accounts Receivable Contract Assets And Contract Liabilities |  |  |
Accounts receivable | $ 625 | $ 745 | $ 482
Contract assets | 281 | 152 | 386
Contract liabilities | $ 868 | $ 1,378 | $ 129

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