Quarterly report pursuant to Section 13 or 15(d)

3. SIGNIFICANT ACCOUNTING POLICIES (Details Narrative)

v3.8.0.1
3. SIGNIFICANT ACCOUNTING POLICIES (Details Narrative) - USD ($)
3 Months Ended 9 Months Ended
Jan. 31, 2018
Jan. 31, 2017
Jan. 31, 2018
Jan. 31, 2017
Apr. 30, 2017
Property, Plant and Equipment [Line Items]          
Intangible assets $ 3,549,427   $ 3,549,427   $ 3,549,427
Impairment of intangible assets     0    
Impairment of long-lived assets     0    
Research and development upfront payment         2,000,000
Research and development costs 802,564 $ 579,717 1,745,692 $ 1,008,489  
Uninsured cash balances $ 1,258,000 $ 2,214,000 $ 1,258,000 $ 2,214,000 $ 3,214,000
SG Austria [Member]          
Property, Plant and Equipment [Line Items]          
Percentage investment in SG Austria 14.50%   14.50%    
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