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Inventories (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Apr. 30, 2025 | Apr. 30, 2024
Inventory Disclosure [Abstract] |  |
Finished goods | $ 27,581 | $ 24,295
Work-in-process | 632 | 1,445
Paper and other materials | 124 | 181
Total inventories before estimated sales returns and LIFO reserve | 28,337 | 25,921
Inventory value of estimated sales returns | 4,042 | 7,833
LIFO reserve | (9,504) | (7,535)
Inventories, net | 22,875 | 26,219
Adjustment for lower of cost or net realizable value | $ 11,100 | $ 11,900

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