Note 7 - Related Party Transactions (Tables)

9 Months Ended

Jan. 31, 2017

Notes Tables

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

	Three Months Ended January 31,				Nine months ended January 31,
($ in thousands)	2017		2016		2017		2016
Non-voting revenues interest in EAM	$	1,803	$	1,825	$	5,389	$	5,546
Non-voting profits interest in EAM		131		94		393		355
	$	1,934	$	1,919	$	5,782	$	5,901