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Schedule of Accounts Receivable, Contract Assets and Contract Liabilities (Details) - USD ($) $ in Thousands	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2022
Account Receivable Contract Assets And Contract Liabilities
Accounts receivable	$ 796	$ 745	$ 482
Contract assets	18	152	386
Contract liabilities	$ 302	$ 1,378	$ 129

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Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as current.

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