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Note E - Accrued Liabilities (Tables)
12 Months Ended
Apr. 30, 2013
Other Liabilities Disclosure [Abstract]  
Schedule of Accrued Liabilities [Table Text Block]
(In thousands)
 
April 30, 2013
   
April 30, 2012
 
             
Employee compensation
  $ 5,227     $ 5,063  
Cash overdrafts (see Note B)
    1,537       128  
Deferred service contract revenue (see Note B)
    3,464       3,036  
Deferred sales tax (see Note B)
    2,436       1,785  
Interest
    237       185  
Other
    3,224       3,152  
                 
    $ 16,125     $ 13,349