10. SEGMENT REPORTING (Details - Segment Revenue ) - USD ($)	12 Months Ended
	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2014
Contract manufacturing revenue	$ 44,357,000	$ 26,744,000	$ 22,294,000
U.S, [Member]
Contract manufacturing revenue	44,357,000	26,715,000	22,225,000
Non-U.S, [Member]
Contract manufacturing revenue	$ 0	$ 29,000	$ 69,000