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Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Deficiency) (Stock Options Narrative) (Details)

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Stockholders' Equity (Deficiency) (Stock Options Narrative) (Details)
 6 Months Ended
Sep. 23, 2015
USD ($)
Item
$ / shares
shares
Aug. 05, 2015
USD ($)
$ / shares
shares
Jun. 08, 2015
USD ($)
$ / shares
shares
Oct. 31, 2015
USD ($)
shares
Oct. 31, 2014
USD ($)
Nov. 30, 2015
shares
Nov. 20, 2015
shares
Apr. 29, 2015
$ / shares
Sep. 30, 2014
shares
Jul. 31, 2014
shares
Mar. 13, 2012
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Price per share | $ / shares               $ 0.155      
Options granted, exercise price | $ / shares     $ 0.168                
Subsequent Event [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Equity Incentive Plan, shares authorized             20,300,000        
2012 Equity Incentive Plan [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Equity Incentive Plan, shares authorized                 16,300,000 14,300,000 9,300,000
Equity Incentive Plan, shares remaining       3,442,687              
2012 Equity Incentive Plan [Member] | Subsequent Event [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Equity Incentive Plan, shares authorized           20,300,000          
Employee [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Stock options issued during period 465,000                    
Number of employee to whom stock option granted | Item 39                    
Fair value of grant | $ $ 48,600                    
Vesting period 3 years                    
Options granted, exercise price | $ / shares $ 0.131                    
Unrecognized compensation cost | $       $ 480,000              
Weighted average recognition period       3 years 2 months 12 days              
Share based compensation expense | $       $ 128,987 $ 211,638            
Non-employee [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Unrecognized compensation cost | $                    
Share based compensation expense | $                    
Chief Academic Officer [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Stock options issued during period     1,000,000                
Fair value of grant | $     $ 60,000                
Chief Operating Officer [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Stock options issued during period     700,000                
Fair value of grant | $     $ 42,000                
Chief Financial Officer [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Stock options issued during period     300,000                
Fair value of grant | $     $ 18,000                
Senior Vice President [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Stock options issued during period   500,000                  
Price per share | $ / shares   $ 0.18                  
Fair value of grant | $   $ 30,000                  
Vesting period   3 years