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INVESTMENT ASSETS: (Tables)
 12 Months Ended
Apr. 30, 2015
Investment Assets [Abstract]  
Schedule Of Investment Assets [Table Text Block]
Investment assets consist of:
 
 
 
April 30,
 
 
 
2015
 
2014
 
 
 
(in thousands)
 
 
 
 
 
 
 
 
 
Land held for long-term investment
 
$
9,733
 
$
10,234
 
 
 
 
 
 
 
 
 
Warehouse facility
 
 
6,572
 
 
6,572
 
Less accumulated depreciation
 
 
(941)
 
 
(796)
 
 
 
 
5,631
 
 
5,776
 
 
 
$
15,364
 
$
16,010