Note 7 - Related Party Transactions (Tables)

3 Months Ended

Jul. 31, 2016

Notes Tables

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

	Three Months Ended July 31,
($ in thousands)	2016		2015
Non-voting revenues interest in EAM	$	1,787	$	1,902
Non-voting profits interest in EAM		129		140
	$	1,916	$	2,042