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Revolving Credit Facility (Details Textual) (USD $)
 1 Months Ended 9 Months Ended 1 Months Ended 1 Months Ended
Jan. 31, 2011
Oct. 31, 2012
Oct. 31, 2012
Revolving Credit Facility [Member]
Apr. 30, 2012
T D Bank [Member]
Jan. 31, 2010
T D Bank [Member]
Oct. 31, 2012
T D Bank Original Loan Agreement [Member]
Oct. 31, 2012
T D Bank Amended Loan Agreement [Member]
Line of Credit Facility, Amount Outstanding     $ 9,600,000   $ 23,500,000   $ 15,400,000
Line of Credit Facility, Increase, Additional Borrowings 6,500,000 9,500,000   3,000,000      
Line Of Credit Facility Expiration Date1           Jun. 30, 2014 Jun. 30, 2013
Line of Credit Facility, Initiation Date             Oct. 17, 2012
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%.