| 
           SIGNIFICANT ACCOUNTING POLICIES (NARRATIVE) (DETAILS) 
         | 
        6 Months Ended | 
|---|---|
| 
           Oct. 31, 2012 
         | 
      |
| 
           Computer equipment/software 
         | 
        |
| Estimated Useful Life | 3 years | 
| 
           Furniture and fixtures 
         | 
        |
| Estimated Useful Life | 7 years | 
| 
           Machinery and equipment 
         | 
        |
| Estimated Useful Life | 7 years | 
| 
           Building improvements 
         | 
        |
| Estimated Useful Life | 15 years | 
| 
           Building 
         | 
        |
| Estimated Useful Life | 40 years |