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Long-Term Debt and Subsequent Event (Details Textual) (USD $)
 3 Months Ended 1 Months Ended 1 Months Ended
Apr. 30, 2013
Revolving Credit Facility [Member]
Oct. 31, 2012
T D Bank Original Loan Agreement [Member]
Apr. 30, 2012
T D Bank [Member]
Jun. 30, 2011
T D Bank [Member]
Jan. 31, 2010
T D Bank [Member]
Oct. 31, 2012
T D Bank Amended Loan Agreement [Member]
Apr. 30, 2013
Subsequent Event [Member]
Line of Credit Facility, Maximum Amount Outstanding During Period $ 9,600,000            
Line of Credit Facility, Interest Rate During Period 3.70%            
Line of Credit Facility, Interest Rate at Period End 2.96%            
Line of Credit Facility, Periodic Payment 131,470            
Line of Credit Facility, Maximum Borrowing Capacity   30,000,000       17,500,000  
Line of Credit Facility, Interest Rate Description   LIBOR plus 2.50%       LIBOR plus 3.50%  
Line of Credit Facility, Amount Outstanding 9,600,000       23,500,000    
Line of Credit Facility, Increase, Additional Borrowings     3,000,000 6,500,000      
Debt Instrument Minimum Borrowing Capacity Amount             $ 3,500,000