| Stockholders' Equity (Deficiency) (Tables)
 | 6 Months Ended | 
| Oct. 31, 2014 | 
| Stockholders' Equity (Deficiency) [Abstract] |  | 
| Schedule of Warrants Activity | 
A summary of the Company's warrant activity during the six months ended October 31, 2014 is presented below:   
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|  |  |  |  |  |  |  |  | Weighted |  |  |  |  |  
|  |  |  |  |  | Weighted |  |  | Average |  |  |  |  |  
|  |  |  |  |  | Average |  |  | Remaining |  |  | Aggregate |  |  
|  |  | Number of |  |  | Exercise |  |  | Contractual |  |  | Intrinsic |  |  
| Warrants |  | Shares |  |  | Price |  |  | Term |  |  | Value |  |  
| Balance Outstanding, April 30, 2014 |  |  | 23,144,005 |  |  | $ | 0.31 |  |  | 4.6 |  | $ |  |  |  
| Granted |  |  | 20,863,958 |  |  |  | 0.19 |  |  | 5.0 |  | $ | 1,499,514 |  |  
| Exercised |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
| Forfeited |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
| Expired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
| Balance Outstanding, October 31, 2014 |  |  | 44,007,963 |  |  | $ | 0.25 |  |  |  | 4.3 |  | $ |  | 1,499,514 |  |  
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
| Exercisable, October 31, 2014 |  |  | 44,007,963 |  |  | $ | 0.25 |  |  |  | 4.3 |  | $ |  | 1,499,514 |  |    | 
| Stock Incentive Plan and Stock Option Grants to Employees and Directors [Member] |  | 
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  | 
| Schedule of Stock Option Activity | 
A summary of the Company's stock option activity for employees and directors during the six months ended October 31, 2014 is presented below:   
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|  |  |  |  |  |  |  |  | Weighted |  |  |  |  |  
|  |  |  |  |  | Weighted |  |  | Average |  |  |  |  |  
|  |  |  |  |  | Average |  |  | Remaining |  |  | Aggregate |  |  
|  |  | Number of |  |  | Exercise |  |  | Contractual |  |  | Intrinsic |  |  
| Options |  | Shares |  |  | Price |  |  | Term |  |  | Value |  |  
| Balance Outstanding, April 30, 2014 |  |  | 10,476,412 |  |  | $ | 0.23 |  |  | 3.5 |  |  | $ |  |  |  
| Granted |  |  | 2,800,000 |  |  | $ | 0.16 |  |  | 4.9 |  |  | $ | 257,000 |  |  
| Exercised |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
| Forfeited |  |  | (20,000 | ) |  | $ | 0.19 |  |  | 4.1 |  |  | $ | 1,200 |  |  
| Expired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
| Balance Outstanding, October 31, 2014 |  |  | 13,256,412 |  |  | $ | 0.21 |  |  |  | 3.6 |  |  | $ | 738,406 |  |  
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
| Exercisable, October 31, 2014 |  |  | 5,710,470 |  |  | $ | 0.26 |  |  |  | 3.1 |  |  | $ | 191,650 |  |    | 
| Stock Option Grants to Non-Employees [Member] |  | 
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  | 
| Schedule of Stock Option Activity | 
A summary of the Company's stock option activity for non-employees during the six months ended October 31, 2014 is presented below:    
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|  |  |  |  |  | Weighted |  |  | Average |  |  |  |  |  
|  |  |  |  |  | Average |  |  | Remaining |  |  | Aggregate |  |  
|  |  | Number of |  |  | Exercise |  |  | Contractual |  |  | Intrinsic |  |  
| Options |  | Shares |  |  | Price |  |  | Term |  |  | Value |  |  
| Balance Outstanding, April 30, 2014 |  |  | 270,000 |  |  | $ | 0.28 |  |  | 2.8 |  |  | $ |  |  |  
| Granted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
| Exercised |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
| Forfeited |  |  | (50,000 | ) |  | $ | 0.19 |  |  | 3.7 |  |  | $ |  |  |  
| Expired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
| Balance Outstanding, October 31, 2014 |  |  | 220,000 |  |  | $ | 0.30 |  |  |  | 2.6 |  |  | $ | 4,500 |  |  
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
| Exercisable, October 31, 2014 |  |  | 73,333 |  |  | $ | 0.30 |  |  |  | 2.6 |  |  | $ | 1,500 |  |    |