Note 7 - Related Party Transactions (Tables)

6 Months Ended

Oct. 31, 2020

Notes Tables

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

	Three Months Ended October 31,				Six Months Ended October 31,
($ in thousands)	2020		2019		2020		2019
Non-voting revenues interest in EAM	$	3,729	$	2,768	$	7,009	$	5,356
Non-voting profits interest in EAM		485		290		849		573
	$	4,214	$	3,058	$	7,858	$	5,929