Note 11 - Capital Stock (Tables)

6 Months Ended

Jan. 31, 2019

Schedule of Warrants, Valuation Assumptions [Table Text Block]

Expected Risk Free Interest Rate	2.90	%
Expected Annual Volatility	63.30	%
Expected Contractual Life in Years	2.50
Expected Annual Dividend Yield	0.00	%

Schedule of Net Proceeds Allocation [Table Text Block]

Fair Value of Shares	$	19,424,095
Fair Value of Share Purchase Warrants		3,094,693
Total Fair Value Before Allocation to Net Proceeds	$	22,518,788

Gross Proceeds	$	20,180,878
Share Issuance Costs - Cash		(1,211,667	)
Net Cash Proceeds Received	$	18,969,211

Relative Fair Value Allocation to:
Shares	$	16,362,327
Share Purchase Warrants		2,606,884
	$	18,969,211

Schedule Of Share Transactions [Table Text Block]

Period / Description	Common		Value per Share				Issuance
Period / Description	Shares Issued		Low		High		Value
Balance, July 31, 2018		161,175,764
Equity Financing		12,613,049	$	1.60	$	1.60	$	20,180,878
Consulting Services		30,845		1.61		1.77		50,713
Warrants Exercised		2,061,764		1.20		1.35		2,496,617
Options Exercised (1)		100,422		0.93		1.32		113,539
Shares Issued Under Stock Incentive Plan		141,546		1.65		1.72		239,255
Balance, October 31, 2018		176,123,390
Credit Facility		1,180,328		1.19		1.19		1,400,000
Consulting Services		98,861		1.26		1.42		127,741
Options Exercised (2)		16,964		0.45		0.45		7,634
Shares Issued Under Stock Incentive Plan		223,156		1.25		1.33		290,237
Balance, January 31, 2019		177,642,699

Schedule Of Share based Compensation Warrants Activity [Table Text Block]

	Number of Warrants			Weighted Average Exercise Price
Balance, July 31, 2018		30,923,489			1.97
Issued		7,063,253			2.05
Exercised		(2,061,764	)		1.21
Expired		(2,850,000	)		2.35
Balance, January 31, 2019		33,074,978		$	2.00

Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]

Weighted Average Exercise Price		Number of Warrants Outstanding		Expiry Date	Weighted Average Remaining Contractual Life (Years)
$	1.20		2,631,068	March 10, 2019		0.10
	1.35		2,450,000	January 30, 2020		1.00
	1.64		50,000	May 21, 2023		4.30
	2.00		9,571,929	January 20, 2020		0.97
	2.05		7,063,253	April 3, 2021		2.17
	2.30		11,308,728	August 9, 2022		3.52
$	2.00		33,074,978			2.04

- Definition

Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable.

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