Quarterly report pursuant to Section 13 or 15(d)

3. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Narrative)

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3. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Narrative) - USD ($)
3 Months Ended 6 Months Ended
Oct. 31, 2016
Oct. 31, 2015
Oct. 31, 2016
Oct. 31, 2015
Apr. 30, 2016
Property, Plant and Equipment [Line Items]          
Intangible assets $ 3,549,427   $ 3,549,427   $ 3,549,427
Impairment of intangible assets     0    
Research and development costs 253,768 $ 439,711 428,772 $ 595,389  
Uninsured cash balances 1,302,000   1,302,000   $ 1,656,000
Cell-in-a-Box [Member]          
Property, Plant and Equipment [Line Items]          
Intangible assets 1,549,427   1,549,427    
Diabetes License [Member]          
Property, Plant and Equipment [Line Items]          
Intangible assets $ 2,000,000   $ 2,000,000    
SG Austria [Member]          
Property, Plant and Equipment [Line Items]          
Percentage investment in SG Austria 14.50%   14.50%