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Non-Controlling Interest (Tables)
3 Months Ended
Jul. 31, 2016
Noncontrolling Interest [Abstract]  
Non-controlling interest
    Bandolier     Fortis     Total  
Non–controlling interest at April 30, 2016   $ (731,060 )    $ 12,782,378     $ 12,051,318  
Non–controlling interest share of income (losses)     (57,702 )     105,377       47,675  
Non–controlling interest at July 31, 2016   $ (788,762 )   $ 12,887,755     $ 12,098,993