CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($)	12 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME
Net (loss) income	$ (5,903,000)	$ 1,527,000
Other comprehensive income, net of tax:
Pension settlement, net of tax ($880 in 2020)	2,049,000	0
(Increase) decrease in pension liability, net of tax ($629 in 2020 and $396 in 2019)	(1,485,000)	903,000
Other comprehensive income	564,000	903,000
Total comprehensive (loss) income	$ (5,339,000)	$ 2,430,000