9. SEGMENT REPORTING (Details - Percentage breakdown) (Sales Revenue, Segment [Member])	3 Months Ended		9 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2015	Jan. 31, 2014
Customer revenue as a percentage of revenue	100.00%	100.00%	100.00%	100.00%
Halozyme Therapeutics [Member]
Customer revenue as a percentage of revenue	81.00%	87.00%	84.00%	88.00%
Advanced Bioscience Labs [Member]
Customer revenue as a percentage of revenue	4.00%	13.00%	10.00%	9.00%
Other Customers [Member]
Customer revenue as a percentage of revenue	15.00%	0.00%	6.00%	3.00%