Note 7 - Related Party Transactions (Tables)

3 Months Ended

Jul. 31, 2017

Notes Tables

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

	Three Months Ended July 31,
($ in thousands)	2017		2016
Non-voting revenues interest in EAM	$	1,978	$	1,787
Non-voting profits interest in EAM		158		129
	$	2,136	$	1,916