| SIGNIFICANT ACCOUNTING POLICIES (NARRATIVE) (DETAILS) | 3 Months Ended | 
|---|---|
| Jul. 31, 2013 | |
| Property, Plant and Equipment [Line Items] | |
| Composition of each Private Placement investment unit | 59,433,600 | 
| Other Machinery and Equipment [Member] | |
| Property, Plant and Equipment [Line Items] | |
| Estimated useful life | 7 years | 
| Furniture and Fixtures [Member] | |
| Property, Plant and Equipment [Line Items] | |
| Estimated useful life | 7 years | 
| Computer Equipment [Member] | |
| Property, Plant and Equipment [Line Items] | |
| Estimated useful life | 3 years | 
| Building [Member] | |
| Property, Plant and Equipment [Line Items] | |
| Estimated useful life | 40 years | 
| Building Improvements [Member] | |
| Property, Plant and Equipment [Line Items] | |
| Estimated useful life | 15 years |