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, 2018
Jul. 31, 2017
Apr. 30, 2018
Property, Plant and Equipment [Line Items]      
Intangible assets $ 3,549,427   $ 3,549,427
Impairment of intangible assets 0 $ 0  
Impairment of long-lived assets $ 0 0  
U.S. federal income tax rate 21.00%    
Research and development costs $ 267,794 427,670  
Uninsured cash balances 1,435,000   772,000
Accumulated deficit (97,179,506)   $ (95,964,143)
Net loss $ (1,215,363) $ (1,688,415)  
SG Austria [Member]      
Property, Plant and Equipment [Line Items]      
Percentage investment in SG Austria 14.50%    
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