Note 7 - Related Party Transactions (Tables)

6 Months Ended

Oct. 31, 2019

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)	2019		2018		2019		2018
Non-voting revenues interest in EAM	$	2,768	$	2,095	$	5,356	$	4,063
Non-voting profits interest in EAM		290		289		573		592
	$	3,058	$	2,384	$	5,929	$	4,655