Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Details) - Schedule of stock option plans

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Stockholders' Equity (Details) - Schedule of stock option plans (USD $)
12 Months Ended
Jul. 31, 2014
Jul. 31, 2013
Jul. 31, 2012
Schedule of stock option plans [Abstract]      
Outstanding at beginning of year (in Shares) 726,645 736,490 785,124
Outstanding at beginning of year $ 10.39 $ 14.50 $ 14.53
New Grants (in Shares) 665,117 336,817  
New Grants $ 2.77 $ 2.88  
Expired (in Shares) (236,852) (346,662) (48,634)
Expired $ 15.80 $ 11.82 $ 15.05
Outstanding at end of year (in Shares) 1,155,910 726,645 736,490
Outstanding at end of year $ 5.03 $ 10.39 $ 14.50
Exercisable at end of year (in Shares) 399,262 389,828 736,490
Exercisable at end of year $ 7.66 $ 16.88 $ 14.50
Weighted average fair value of options granted during year $ 0.90 $ 1.22