Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Details Narrative)

v3.8.0.1
Stock-Based Compensation (Details Narrative) - USD ($)
3 Months Ended
Oct. 31, 2017
Oct. 31, 2016
Purchase price of incentive stock options as a percentage of its fair value 85.00%  
Stock-based compensation expense recognized $ 23,000 $ 16,000
Weighted-average grant date fair value $ .67 $ 1.16
Research And Development Expense [Member]    
Stock-based compensation expense recognized $ 200,000 $ 300,000
General And Administrative Expense [Member]    
Stock-based compensation expense recognized 400,000 700,000
Employees, Directors and Consultants [Member]    
Stock-based compensation expense recognized $ 600,000 $ 1,000,000
Plan 2011 [Member]    
Number of shares authorized for issuance to awards granted 5,000,000  
Maximum shares granted per fiscal year per individual 500,000  
Term of stock options 10 years  
Plan 2011 [Member] | Minimum [Member]    
Provisional percentage of outstanding stock owned by stockholders 10.00%  
Exercise price as a percentage of fair value of common stock 110.00%  
Purchase price of incentive stock options as a percentage of its fair value 100.00%  
Plan 2011 [Member] | Employee, Director and Consultants [Member]    
Employee stock purchase program description The 2011 Plan includes an automatic increase of the number of shares of common stock reserved thereunder on the first business day of each calendar year by the lesser of: (i) 3% of the shares of the Company’s common stock outstanding as of the last day of the immediately preceding calendar year; (ii) 500,000 shares; or (iii) such lesser number of shares as determined by the Company’s Board of Directors.  
Plan 2011 [Member] | Employees [Member]    
Options granted to purchase shares 163,500 346,500
Term of stock options 10 years 10 years
Vesting period 3 years 3 years
Exercise price per share, low end of the range $ 0.92 $ 1.71
Exercise price per share, high end of the range $ 0.96 $ 1.94
Plan 2011 [Member] | Director [Member]    
Options granted to purchase shares 200,000  
Term of stock options 10 years  
Vesting period 1 year  
Exercise price per share, low end of the range $ 0.979  
Exercise price per share, high end of the range $ 1.08  
Plan 2011 [Member] | Consultants [Member]    
Options granted to purchase shares 50,000 310,000
Term of stock options 10 years 10 years
Exercise price per share, low end of the range   $ 1.74
Exercise price per share, high end of the range $ 1.00 $ 2.00
2015 ESPP [Member]    
Purchase price of incentive stock options as a percentage of its fair value 85.00%  
Stock issued during period, shares, employee stock purchase plans 500,000  
Discount from market price, offering date 15.00%  
Fair market value of unvested shares, percentage 15.00%  
2015 ESPP [Member] | Three Offering Period [Member]    
Aggregate of shares purchased and distributed to employees 58,066  
2015 ESPP [Member] | Fourth Offering Period [Member]    
Number of shares authorized for issuance to awards granted 423,072  
Discount from market price, offering date 15.00%  
Purchase price per share $ .88  
Risk-free interest rate 0.40%  
Forfeiture percentage 0.00%  
Volatility rate 96.91%  
Expected term of volatility 6 months  
Dividend rate 0.00%  
2015 ESPP [Member] | Fourth Offering Period [Member] | January 31, 2018 [Member]    
Aggregate of shares purchased and distributed to employees 18,862  
ESPP [Member]    
Stock-based compensation expense recognized $ 7,000 $ 24,000