Product Warranties (Details) - Schedule of Product Warranty Liability - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2023	Apr. 30, 2022
Schedule Of Product Warranty Liability Abstract
Balance at beginning of year	$ 519	$ 439
Warranty costs incurred	(499)	(587)
Product warranty accrual	509	667
Balance at end of year	$ 529	$ 519