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PRODUCT WARRANTIES - Schedule of Product Warranty Liability (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Jan. 31, 2026
Apr. 30, 2025
Schedule Of Product Warranty Liability Abstract    
Balance at beginning of year $ 567 $ 542
Warranty costs incurred (234) (253)
Product warranty accrual 211 278
Balance at end of year $ 544 $ 567