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Out of Period Adjustment (Tables)
12 Months Ended
Apr. 30, 2012
Prior Period Adjustment [Abstract]  
Schedule of Error Corrections and Prior Period Adjustments [Table Text Block]
Fiscal Year Ended April 30,
2011
2010
2009
2008
 
 
 
 
 
Net earnings (loss)
 
 
 
 
As reported
$
1,233,000

$
(27,000
)
$
303,000

$
165,000

Adjustments
23,000

23,000

14,000

39,000

Restated
$
1,256,000

$
(4,000
)
$
317,000

$
204,000

 
 
 
 
 
 
 
 
 
 
Basic earnings (loss) per share
 
 
 
 
As reported
$
0.21

$
(0.01
)
$
0.06

$
0.03

Adjustments

0.01


0.01

Restated
$
0.21

$

$
0.06

$
0.04