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Cash Flow Information
9 Months Ended
Apr. 30, 2013
Supplemental Cash Flow Elements [Abstract]  
Cash Flow, Supplemental Disclosures [Text Block]
10.         Cash Flow Information:
 
For purposes of reporting cash flows, the Company considers cash equivalents to consist of short-term highly liquid investments with maturities of three (3) months or less, which are readily convertible into cash.
           Supplemental disclosure: Nine Months Ended
  April 30
      2013       2012
Interest paid, net of capitalized interest of $15,217 (2013)      
       and $1,269 (2012) $      325,080 $      429,680
 
Income taxes paid $ 594,382 $ 117,395