Note 7 - Related Party Transactions (Tables)

9 Months Ended

Jan. 31, 2020

Notes Tables

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

	Three Months Ended January 31,				Nine Months Ended January 31,
($ in thousands)	2020		2019		2020		2019
Non-voting revenues interest in EAM	$	3,033	$	1,997	$	8,389	$	6,060
Non-voting profits interest in EAM		422		213		995		805
	$	3,455	$	2,210	$	9,384	$	6,865