Quarterly report pursuant to Section 13 or 15(d)

Net income (loss) per share (Details)

v3.3.0.814
Net income (loss) per share (Details) - shares
 3 Months Ended
Oct. 31, 2015
Oct. 31, 2014
Weighted Average Stock Options [Member]    
Net income (loss) per share (Details) [Line Items]    
Antidilutive Securities Included In Computation Of Earnings Per Share Amount 125,000  
Unvested Restricted Stock [Member]    
Net income (loss) per share (Details) [Line Items]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount   482,000
In the Money Stock Options [Member]    
Net income (loss) per share (Details) [Line Items]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount   482,000
Outstanding Options [Member]    
Net income (loss) per share (Details) [Line Items]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 374,000 142,000