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6. STOCK OPTIONS AND WARRANTS (Tables)

9 Months Ended

Jan. 31, 2017

Employee stock option activity

		Options				Weighted Average Exercise Price				Weighted Average Grant Date Fair Value per Share
Outstanding, April 30, 2016			68,050,000			$	0.13			$	0.09
Issued			13,100,000				0.07				0.04
Exercised			–
Total Outstanding, January 31, 2017			81,150,000				0.12				0.09
Total Exercisable, January 31, 2017			68,500,000				0.13				–
Total Vested and expected to vest as of January 31, 2017			68,650,000			$	0.13			$	–

Outstanding stock options by exercise price

		Exercise Price
Exercise Price		$	0.19			$	0.11			$	0.18			$	0.063			$	0.069
Number of Options Outstanding			25,000,000				27,200,000				250,000				15,600,000				13,100,000
Weighted Average Remaining Contractual Life (years) of Outstanding Options			2.66				2.92				3.22				3.92				4.25
Weighted Average Exercise Price		$	0.19			$	0.11			$	0.18			$	0.063			$	0.069
Number of Options Exercisable			25,000,000				27,200,000				250,000				15,600,000				450,000
Weighted Average Exercise Price of Exercisable Options		$	0.19			$	0.11			$	0.18			$	0.063			$	0.069

Warrant activity

		Warrants				Weighted Average Exercise Price
Outstanding, April 30, 2016			84,969,908			$	0.16
Issued			769,231				0.07
Expired			(18,755,200	)			0.25
Total Outstanding, January 31,2017			66,983,939				0.13
Total Exercisable, January 31, 2017			66,983,939			$	0.13

Schedule of warrants outstanding by exercise prices

Range of Exercise Prices		Number of Warrant Shares Exercisable at 01/31/2017				Weighted Average Remaining Contractual Life				Weighted Average Exercise Price
$0.075, $0.11, $0.12, $0.18 and $0.25			66,983,939				2.06			$	0.13
Five Year Term    -    $0.075			1,056,000				0.69
Five Year Term    -    $0.12			35,347,508				2.41
Five Year Term    -    $0.18			19,811,200				0.91
Five Year Term    -    $0.065			769,231				4.89
Five Year Term    -    $0.11			10,000,000				3.14
			66,983,939

Employee Options [Member]

Assumptions

		Nine Months Ended January 31,
		2017				2016
Risk-free interest rate			–				1.36%
Expected volatility			–				111%
Expected lives (years)			–				5.0
Expected dividend yield			–				0.00%

Non-Employee Options [Member]

Assumptions

		Nine Months Ended January 31,
		2017				2016
Risk-free interest rate			1.90%				–
Expected volatility			110%				–
Expected lives (years)			5.0				–
Expected dividend yield			0.00%				–

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