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Intangible Assets and Goodwill (Tables)
3 Months Ended
Jan. 31, 2013
Intangible Assets And Goodwill Tables  
The components of finite-lived intangible assets acquired
   Weighted      
   Average  January 31,  April 30,
   Life  2013  2012
Trade names   5 Years   $733,000   $733,000 
Customer relationships   2 Years    758,000    758,000 
Non-compete agreement   4 Years    68,000    68,000 
Total gross carrying amount        1,559,000    1,559,000 
                
Less accumulated amortization expense        1,385,134    1,262,434 
Net intangible assets       $173,866   $296,566 

Estimated future amortization expense related to intangible assets
Year ending April 30:   
 2013   $162,566 
 2014    134,000 
     $296,566