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Annual report pursuant to Section 13 and 15(d)

Subsequent Events (Details)

v3.5.0.2
Subsequent Events (Details) - USD ($)
1 Months Ended
Nov. 20, 2015
Jun. 08, 2015
Jul. 31, 2016
Jun. 24, 2016
Jun. 23, 2016
May 19, 2016
Apr. 30, 2016
Apr. 30, 2015
Sep. 30, 2014
Apr. 30, 2014
Subsequent Event [Line Items]                    
Weighted average exercise price of options granted   $ 0.168                
Common stock, shares authorized             250,000,000 250,000,000 120,000,000 250,000,000
Common stock, shares issued             135,158,145 128,253,605    
Director [Member]                    
Subsequent Event [Line Items]                    
Stock options issued during period 250,000                  
Weighted average exercise price of options granted $ 0.165                  
Vesting period 3 years                  
Fair value of grant $ 37,500                  
Chief Operating Officer [Member]                    
Subsequent Event [Line Items]                    
Stock options issued during period   700,000                
Fair value of grant   $ 42,000                
Chief Academic Officer [Member]                    
Subsequent Event [Line Items]                    
Stock options issued during period   1,000,000                
Fair value of grant   $ 60,000                
Chief Financial Officer [Member]                    
Subsequent Event [Line Items]                    
Stock options issued during period   300,000                
Fair value of grant   $ 18,000                
Subsequent Event [Member]                    
Subsequent Event [Line Items]                    
Options Term         5 years          
Weighted average exercise price of options granted         $ 0.166          
Vesting period         3 years          
Subsequent Event [Member] | Restricted Stock [Member]                    
Subsequent Event [Line Items]                    
Amortization       $ 75,000            
Grant date fair value       $ 0.15            
Subsequent Event [Member] | Former Institutional Investor [Member]                    
Subsequent Event [Line Items]                    
Weighted average exercise price of options granted       $ 0.155            
Fair value of grant       $ 400,000            
Number of warrants surrender       13,451,613            
Payment for exchange of warrants surrender       $ 400,000            
Grant date fair value       $ 0.16            
Subsequent Event [Member] | Investor One [Member] | Restricted Stock [Member]                    
Subsequent Event [Line Items]                    
Stock options issued during period       2,500,000            
Agreement Term       6 months            
Subsequent Event [Member] | Investor Two [Member] | Restricted Stock [Member]                    
Subsequent Event [Line Items]                    
Stock options issued during period       500,000            
Agreement Term       12 months            
Subsequent Event [Member] | 2012 Equity Incentive Plan [Member]                    
Subsequent Event [Line Items]                    
Increased number of authorized shares         5,000,000          
Common stock, shares authorized         25,300,000          
Subsequent Event [Member] | Non-employee Directors [Member]                    
Subsequent Event [Line Items]                    
Stock options issued during period           150,000        
Options Term           5 years        
Weighted average exercise price of options granted           $ 0.16        
Vesting period           3 years        
Subsequent Event [Member] | Chairman of Compensation Committee [Member]                    
Subsequent Event [Line Items]                    
Stock options issued during period           50,000        
Options Term           5 years        
Weighted average exercise price of options granted           $ 0.16        
Vesting period           3 years        
Subsequent Event [Member] | Chairman of Audit Committee [Member]                    
Subsequent Event [Line Items]                    
Stock options issued during period           50,000        
Options Term           5 years        
Weighted average exercise price of options granted           $ 0.16        
Vesting period           3 years        
Subsequent Event [Member] | Director [Member]                    
Subsequent Event [Line Items]                    
Stock units granted           150,000        
Fair value of grant           $ 7,500        
Subsequent Event [Member] | Two Directors [Member]                    
Subsequent Event [Line Items]                    
Stock units granted           200,000        
Fair value of grant           $ 10,000        
Subsequent Event [Member] | Chief Operating Officer [Member]                    
Subsequent Event [Line Items]                    
Stock options issued during period         2,000,000          
Fair value of grant         $ 100,000          
Increased salary amount     $ 240,000              
Subsequent Event [Member] | Chief Academic Officer [Member]                    
Subsequent Event [Line Items]                    
Stock options issued during period         700,000          
Fair value of grant         $ 35,000          
Subsequent Event [Member] | Chief Financial Officer [Member]                    
Subsequent Event [Line Items]                    
Stock options issued during period         300,000          
Fair value of grant         $ 15,000          
Increased salary amount     $ 220,000