CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)	3 Months Ended		9 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2023	Jan. 31, 2022
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 16,574,000	$ 910,000	$ 22,107,000	$ 5,873,000
Other comprehensive income, net of tax:
Pension settlement expense	2,336,000		2,336,000
Income tax effect	(724,000)		(724,000)
Pension settlement expense, net of tax	1,612,000		1,612,000
Decrease in pension liability	94,000	98,000	301,000	293,000
Income tax effect	(29,000)	(31,000)	(93,000)	(93,000)
Decrease in pension liability, net of tax	65,000	67,000	208,000	200,000
Other comprehensive income	1,677,000	67,000	1,820,000	200,000
Total comprehensive income	$ 18,251,000	$ 977,000	$ 23,927,000	$ 6,073,000