Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details)

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Stockholders' Equity (Details) (USD $)
 3 Months Ended
Oct. 31, 2014
Oct. 31, 2013
Jul. 31, 2014
Stockholders' Equity (Details) [Line Items]      
Common Stock, Par or Stated Value Per Share (in Dollars per share) $ 0.01   $ 0.01
Maximum Offering Price Under Sales Agreement (in Shares) 20,000,000    
Percentage of Commission Payable on Equity Offering 3.00%    
Average Sale Price of Stock (in Dollars per share) $ 5.38 $ 2.48  
Proceeds from Issuance of Common Stock $ 2,322,000 $ 1,684,000  
Stock Offering and Commissions Expenses 82,000 52,000  
Excess Tax Benefit from Share-based Compensation, Financing Activities 0 0  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options 300,000    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 7 months    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized 100,000    
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Outstanding Weighted Average Remaining Contractual Terms 18 months    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares) 1,682,000    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value $ 35,000 $ 22,000  
Common Stock [Member]
      
Stockholders' Equity (Details) [Line Items]      
Stock Issued During Period, Shares, New Issues (in Shares) 505,829 701,455