Quarterly report pursuant to Section 13 or 15(d)

2. SIGNIFICANT ACCOUNTING POLICIES (Details Narrative)

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2. SIGNIFICANT ACCOUNTING POLICIES (Details Narrative) - USD ($)
3 Months Ended
Jul. 31, 2019
Jul. 31, 2018
Apr. 30, 2019
Property, Plant and Equipment [Line Items]      
Intangible assets $ 3,549,427   $ 3,549,427
Research and development costs 72,330 $ 267,794  
Uninsured cash balances 49,000   127,000
Accumulated deficit (101,165,446)   $ (100,031,371)
Net loss (1,134,075) $ (1,215,363)  
Proceeds from sale of stock, gross 600,000    
Cell-in-a-Box [Member]      
Property, Plant and Equipment [Line Items]      
Intangible assets 1,549,427    
Diabetes License [Member]      
Property, Plant and Equipment [Line Items]      
Intangible assets $ 2,000,000    
SG Austria [Member]      
Property, Plant and Equipment [Line Items]      
Percentage investment in SG Austria 14.50%