Note 11 - Capital Stock (Tables)

9 Months Ended

Apr. 30, 2019

Notes Tables

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
	Shares Issued		Low		High		Value
Balance, July 31, 2018		161,175,764
Equity Financing		12,613,049	$	1.60	$	1.60	$	20,180,878
Credit Facility		1,180,328		1.19		1.19		1,400,000
Exchange of Warrants		750,000		1.33		1.33		997,500
Consulting Services		165,404		1.23		1.77		226,539
Warrants Exercised		3,999,881		1.20		1.35		4,822,357
Options Exercised (1)		118,985		0.45		1.32		123,221
Shares Issued Under Stock Incentive Plan		558,875		1.25		1.72		785,117
Balance, April 30, 2019		180,562,286

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		(3,999,881	)		1.21
Expired		(3,542,951	)		2.13
Cancelled		(11,000,000	)		2.30
Balance, April 30, 2019		19,443,910		$	1.94

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)
$	1.35		2,450,000	January 30, 2020		0.75
	1.64		50,000	May 21, 2023		4.06
	2.00		9,571,929	January 20, 2020		0.73
	2.05		7,063,253	April 3, 2021		1.93
	2.30		308,728	August 9, 2022		3.28
$	1.94		19,443,910			1.21