Annual report pursuant to Section 13 and 15(d)

5. STOCK OPTIONS AND WARRANTS (Details Narrative)

5. STOCK OPTIONS AND WARRANTS (Details Narrative) - USD ($)	12 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2014	Apr. 30, 2013
Stock based compensation - options	$ 945,078	$ 597,400
Class A Warrants [Member]
Warrants issued, shares					19,811,200
Warrants exercise price				$ 0.25	$ 0.075
Warrants converted, shares				18,755,200
Warrants expired, shares	1,056,000
Class B Warrants [Member]
Warrants issued, shares					19,811,200
Warrants exercise price					$ 0.12
Warrants exercised				(2,318,000)
Warrants expired, shares	17,493,200
Class C Warrants [Member]
Warrants issued, shares					19,811,200
Warrants exercise price					$ 0.18
Warrants expired, shares	18,755,200
Class D Warrants [Member]
Warrants expired, shares			18,755,200
Employee Options [Member]
Options granted in period	11,950,000	9,250,000
Stock based compensation - options	$ 741,476	$ 557,322
Unrecognized compensation expense	$ 232,023
Non-Employee Options [Member]
Options granted in period	4,200,000	14,300,000
Stock based compensation - options	$ 203,602	$ 40,078
Options [Member]
Options granted in period	16,150,000	23,550,000
Aggregate intrinsic value	$ 0
Aggregate intrinsic value per share	$ 0.054
Options [Member] \| Non-Employee Options [Member] \| Guaranteed Options [Member]
Options granted in period	4,200,000	1,800,000
Options [Member] \| Non-Employee Options [Member] \| Non-Guaranteed Options [Member]
Options granted in period	0	12,500,000
Unvested Stock Options [Member]
Options granted in period	16,150,000	23,550,000
Unrecognized compensation expense weighted-average period	8 months
Warrants [Member] \| January 1, 2017 [Member]
Warrants issued		769,231
Aggregate fair value of warrants issued		$ 40,000
Warrants [Member] \| April 4, 2017 [Member]
Warrants issued		869,565
Aggregate fair value of warrants issued		$ 40,000
Warrants [Member] \| May 24, 2017 [Member]
Warrants issued	833,333
Aggregate fair value of warrants issued	$ 20,000
Warrants [Member] \| July 26, 2017 [Member]
Warrants issued	2,000,000
Aggregate fair value of warrants issued	$ 39,000
Warrants [Member] \| February 27, 2018 [Member]
Warrants issued	1,666,667
Aggregate fair value of warrants issued	$ 37,000