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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
12 Months Ended
Apr. 30, 2016
Schedule of Fair Value of Financial Instruments [Table Text Block]
          April 30, 2016                 April 30, 2015        
    Level 1     Level 2     Level 3     Total     Level 1     Level 2     Level 3     Total  
                                                 
Marketable securities $ 255,824   $   —   $   —   $ 255,824   $ 359,857   $   —   $   —   $ 359,857  
Total assets at fair value $ 255,824   $   —   $   —   $ 255,824   $ 359,857   $   —   $   —   $ 359,857