Annual report pursuant to Section 13 and 15(d)

GOING CONCERN AND MANAGEMENT'S PLANS - Narrative (Details)

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GOING CONCERN AND MANAGEMENT'S PLANS - Narrative (Details) (USD $)
12 Months Ended
Apr. 30, 2013
Apr. 30, 2012
Going Concern And Management's Plans [Abstract]    
Accumulated deficit $ (41,446,107) $ (39,848,005)
Net loss (1,598,102) (1,899,312)
Working capital $ (1,950,234)  
Ownership percentage in SG Austria and subsidiary of SG Austria 14.50%