7. EQUITY COMPENSATION PLANS (Details - Option activity)	6 Months Ended
	Oct. 31, 2015 $ / shares shares
Number of Options
Number of Options Outstanding, Beginning | shares	20,708,672
Number of Options Granted | shares	3,731,035
Number of Options Exercised | shares	(165,266)
Number of Options Cancelled or Expired | shares	(650,840)
Number of Options Outstanding, Ending | shares	23,623,601
Weighted Average Exercise Price
Weighted Average Exercise Price Outstanding, Beginning | $ / shares	$ 1.54
Weighted Average Exercise Price Granted | $ / shares	1.30
Weighted Average Exercise Price Exercised | $ / shares	0.80
Weighted Average Exercise Price Canceled | $ / shares	1.76
Weighted Average Exercise Price Outstanding, Ending | $ / shares	$ 1.50