Income Taxes income Taxes (Change in Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2024	Apr. 30, 2023
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 2,892	$ 2,070
Additions based on tax positions of prior years	0	1,568
Reductions for tax positions of prior years settlements	0	(746)
Balance at end of year	$ 2,892	$ 2,892