Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Details Narrative)

v3.20.4
Stock-Based Compensation (Details Narrative) - USD ($)
3 Months Ended 6 Months Ended
Oct. 02, 2019
Jan. 31, 2021
Jan. 31, 2020
Oct. 31, 2019
Jan. 31, 2021
Jan. 31, 2020
Jul. 31, 2020
Purchase price of incentive stock options as a percentage of its fair value         85.00%    
Unrecognized stock-based compensation expenses   $ 2,200,000     $ 2,200,000    
Number of options cancelled           878,534  
Number of stock option awards outstanding   2,359,604     2,359,604    
Stock issued for restricted common stock 15,000            
Stock-based compensation costs $ 200,000            
Intrinsic value of options outstanding, value   $ 12,000,000     $ 12,000,000    
Intrinsic value of options exercisable   $ 8,100,000     $ 8,100,000    
Unrecognized stock-based compensation amortization period         2 years 18 days    
Weighted-average grant date fair value of stock options granted   $ 4.19 $ 1.44   $ 2.66 $ 1.35  
Number of shares issued for service, value   $ 127,500 $ 247,601   $ 212,501 $ 466,773  
Number of shares authorized for issuance   5,474,027     5,474,027    
Research and Development Expense [Member]              
Stock-based compensation costs   $ 300,000 700,000   $ 1,300,000 800,000  
General and Administrative Expense [Member]              
Stock-based compensation costs   1,000,000 600,000   1,000,000 900,000  
Accelerated Vesting of Time-vesting Options [Member]              
Stock-based compensation costs   0     $ 1,300,000    
Stock Option Awards [Member]              
Stock-based compensation costs     1,200,000     1,200,000  
Restricted Stock Units 1 (RSUs) [Member]              
Stock issued for restricted common stock         19,332    
Stock-based compensation costs   42,000 100,000   $ 69,000 $ 200,000  
Restricted stock units vested         13,082    
Stock Option Cancellation Agreements [Member]              
Number of options cancelled           699,140  
Consulting Agreement [Member]              
Stock issued for restricted common stock 3,000            
Minimum [Member]              
Fair value maturity         5 years 5 years  
Maximum [Member]              
Fair value maturity         6 years 6 months 6 years 6 months  
Employees [Member]              
Number of options issued         300,000    
Vesting period of stock options granted         1 year    
Exercise price         $ 3.56    
Term of stock options         10 years    
Employees and Consultants [Member]              
Number of options issued           179,394  
Number of options issued, value           $ 26,000  
Senior Level Option Holders [Member]              
Additional paid-in-capital     26,000     26,000  
Employees, Directors and Consultants [Member]              
Stock-based compensation costs   400,000 1,300,000   $ 2,300,000 1,700,000  
Consultants [Member]              
Stock-based compensation costs   $ 100,000 $ 200,000   $ 200,000 $ 500,000  
Number of shares issued for service   37,500 58,812   62,500 94,499  
Number of shares issued for service, value   $ 100,000 $ 200,000   $ 200,000 $ 500,000  
2011 Plan [Member]              
Stock option exercisable period         10 years    
Number of options issued         1,237,251    
Number of stock option awards outstanding   2,359,604 15,000   2,359,604 15,000 1,442,856
Unrecognized compensation cancelled outstanding stock option awards           $ 1,200,000  
Exercise price         $ 3.79    
2011 Plan [Member] | Employees, Directors and Consultants [Member]              
Employee stock purchase program description         The 2011 Plan authorizes a total of 3,350,000 shares of common stock for issuance. Under the 2011 Plan, incentive stock options are to be granted at a price that is no less than 100% of the fair value of the Company's common stock at the date of grant. Stock options vest over a period specified in the individual option agreements entered into with grantees and are exercisable for a maximum period of 10 years after the date of grant.    
Number of shares authorized for issuance to awards granted   3,350,000     3,350,000    
2011 Plan [Member] | Employees, Directors and Consultants [Member] | Minimum [Member]              
Purchase price of incentive stock options as a percentage of its fair value         100.00%    
Provisional percentage of outstanding stock owned by stockholders         110.00%    
2011 Plan [Member] | Employees [Member]              
Number of vesting shares         791,019    
Unrecognized stock-based compensation expenses   $ 1,200,000     $ 1,200,000    
Number of options issued         787,251 5,050  
Vesting period of stock options granted         3 years 3 years  
Term of stock options         10 years 10 years  
2011 Plan [Member] | Employees [Member] | Minimum [Member]              
Exercise price         $ 3.43 $ 1.89  
2011 Plan [Member] | Employees [Member] | Maximum [Member]              
Exercise price         $ 6.28 $ 2.21  
2011 Plan [Member] | Directors [Member]              
Number of vesting shares         91,666    
Unrecognized stock-based compensation expenses   $ 100,000     $ 100,000    
Number of options issued         125,000    
Vesting period of stock options granted         1 year    
Exercise price         $ 3.43    
Term of stock options         10 years    
2011 Plan [Member] | Consultants [Member]              
Number of options issued         25,000    
Vesting period of stock options granted         1 year    
Exercise price         $ 3.82    
Term of stock options         10 years    
ESPP [Member]              
Stock-based compensation costs       $ 2,700 $ 4,100    
Number of shares authorized for issuance   50,000     50,000    
Number of shares purchased         1,538    
Remaining shares to be issued   31,871     31,871    
Discount from market price, offering date         15.00%    
Fair market value of unvested shares, percentage         15.00%    
Fair value maturity         6 months 6 months  
Fair value risk free interest rate         0.10% 2.04%  
Fair value volatility rate         122.84% 90.64%  
Fair value forfeitures percentage         0.00% 0.00%  
Fair value dividend         $ 0 $ 0  
ESPP [Member] | Six Month Call On Unvested Share [Member]              
Fair market value of unvested shares, percentage         85.00%