Note 3 - Related Party Transactions (Tables)

12 Months Ended

Apr. 30, 2018

Notes Tables

Schedule of Non Voting Revenues Interest and Non Voting Profits Interests [Table Text Block]

	Fiscal Years Ended April 30,
($ in thousands)	2018		2017		2016
Non-voting revenues interest in EAM	$	8,040	$	7,195	$	7,211
Non-voting profits interest in EAM		746		519		440
	$	8,786	$	7,714	$	7,651