Note 2 - Schedule of Assets and Liabilities (Details) - EAM Trust [Member] - USD ($) $ in Thousands		Apr. 30, 2016	Apr. 30, 2015
EAM's total assets		$ 60,955	$ 60,292
EAM's total liabilities (1)	[1]	(3,627)	(3,021)
EAM's total equity		$ 57,328	$ 57,271

[1] At July 31, 2016 and April 30, 2016, EAM's total liabilities included a payable to VLI for its accrued non-voting revenues, interest and the 90% distributable share of its non-voting profits interest of $1,903,000 and $1,750,000, respectively.