Note 7 - Related Party Transactions (Tables)

6 Months Ended

Oct. 31, 2021

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)	2021		2020		2021		2020
Non-voting revenues interest in EAM	$	4,263	$	3,729	$	8,412	$	7,009
Non-voting profits interest in EAM		629		485		1,285		849
	$	4,892	$	4,214	$	9,697	$	7,858