Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details)

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Stockholders' Equity (Details) (USD $)
 1 Months Ended 6 Months Ended 6 Months Ended 1 Months Ended 6 Months Ended 1 Months Ended 6 Months Ended 1 Months Ended 6 Months Ended
Oct. 03, 2013
Mar. 28, 2013
Jan. 31, 2014
Jan. 31, 2013
Jul. 31, 2013
Jan. 31, 2014
Common Stock [Member]
Nov. 26, 2013
Senior Officers [Member]
Jan. 31, 2014
Senior Officers [Member]
Jan. 17, 2014
Senior Officers and Board of Directors [Member]
Jan. 31, 2014
Senior Officers and Board of Directors [Member]
Jan. 17, 2014
Executive Officers [Member]
Jan. 31, 2014
Executive Officers [Member]
Stockholders' Equity (Details) [Line Items]                        
Common Stock, Par or Stated Value Per Share (in Dollars per share)   $ 0.01 $ 0.01   $ 0.01              
Maximum Offering Price Under Sales Agreement (in Shares)   20,000,000                    
Percentage of Commission Payable on Equity Offering   3.00%                    
Stock Issued During Period, Shares, New Issues (in Shares)           1,686,413            
Average Sale Price of Stock (in Dollars per share)     $ 2.59                  
Proceeds from Issuance of Common Stock (in Dollars)     $ 4,244,000                  
Excess Tax Benefit from Share-based Compensation, Financing Activities (in Dollars)     0 0                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares) 10,000   645,117       271,591   267,797   95,729  
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share) $ 2.53   $ 2.82       $ 3.00   $ 2.70   $ 2.70  
Share Based Compensation Arrangement by Share Based Payment Award Options Term 5 years           4 years   5 years   5 years  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 4 years           1 year   2 years   3 years  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share) $ 1.23           $ 0.66   $ 1.05   $ 1.10  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 4 years 9 months           2 years 6 months   3 years 3 months   3 years 6 months  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate 57.60%           54.79%   54.78%   55.45%  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 1.30%           0.42%   0.90%   1.00%  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Payments (in Dollars) 0           0   0   0  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares (in Shares)     0         0   0   0
Number of Officers             2   2      
Share Based Compensation Arrangement by Share Based Payment Award Options Awarded to Set off Compensation Liability in Lieu of Cash (in Dollars)             200,000          
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options (in Dollars)     600,000                  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition     20 months                  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars)     $ 100,000                  
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Outstanding Weighted Average Remaining Contractual Terms     1 year                  
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares)     1,681,000