Quarterly report pursuant to Section 13 or 15(d)

3. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Narrative)

v3.6.0.2
3. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Narrative) - USD ($)
3 Months Ended 9 Months Ended
Jan. 31, 2017
Jan. 31, 2016
Jan. 31, 2017
Jan. 31, 2016
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 579,717 $ 573,978 1,008,489 $ 1,169,367  
Uninsured cash balances 2,214,000   2,214,000   $ 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%