Note 12 - Capital Stock (Tables)

6 Months Ended

Jan. 31, 2020

Notes Tables

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

Weighted Average Exercise Price		Number of Warrants Outstanding		Weighted Average Remaining Contractual Life (Years)	Expiry Date
$	1.25		150,000	0.90	December 23, 2020
	1.50		150,000	0.90	December 23, 2020
	2.05		7,063,253	1.17	April 3, 2021
	2.30		308,728	2.52	August 9, 2022
	1.64		50,000	3.30	May 21, 2023
$	2.03		7,721,981	1.23

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

	Number of Warrants			Weighted Average Exercise Price
Balance, July 31, 2019		19,443,910			1.94
Issued		300,000			1.38
Expired		(12,021,929	)		1.87
Balance, January 31, 2020		7,721,981		$	2.03

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

Date	Options Granted		Exercise Price		Term (Years)		Fair Value		Expected Life (Years)		Risk-Free Interest Rate			Dividend Yield			Expected Volatility
August 7, 2019		597,650	$	0.91		10.00	$	303,160		5.00		1.51	%		0.00	%		66.10	%

Share-based Payment Arrangement, Option, Activity [Table Text Block]

	Number of Stock Options			Weighted Average Exercise Price
Balance, July 31, 2019		15,738,350		$	1.30
Granted		597,650			0.91
Expired		(5,990,000	)		1.34
Balance, October 31, 2019		10,346,000		$	1.25
Forfeited		(21,875	)		1.19
Expired		(37,500	)		1.20
Balance, January 31, 2020		10,286,625		$	1.25

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]

	Number of Unvested Stock Options			Weighted Average Grant-Date Fair Value
Balance, July 31, 2019		3,310,600		$	0.59
Granted		597,650			0.51
Vested		(645,550	)		0.61
Balance, October 31, 2019		3,262,700		$	0.57
Forfeited		(21,875	)		0.59
Vested		(806,534	)		0.62
Balance, January 31, 2020		2,434,291		$	0.55

Share-based Payment Arrangement, Option, Exercise Price Range [Table Text Block]

			Options Outstanding						Options Exercisable
Range of Exercise Prices			Outstanding at January 31, 2020		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (Years)		Exercisable at January 31, 2020		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (Years)
$0.91	to	$0.99		4,227,625	$	0.94		6.11		2,309,334	$	0.94		3.30
$1.00	to	$1.49		3,572,500		1.22		1.92		3,531,250		1.22		1.89
$1.50	to	$3.75		2,486,500		1.84		2.95		2,011,750		1.91		2.83
				10,286,625	$	1.25		3.89		7,852,334	$	1.31		2.54

Share-based Payment Arrangement, Cost by Plan [Table Text Block]

	Three Months Ended January 31,				Six Months Ended January 31,
	2020		2019		2020			2019
Stock-Based Compensation for Consultants
Common stock issued for consulting services	$	126,150	$	229,806	$	233,758		$	360,610
Amortization of stock option expenses		53,554		30,319		100,525			84,720
		179,704		260,125		334,283			445,330
Stock-Based Compensation for Management
Common stock issued to management		34,100		35,639		68,807			70,983
Amortization of stock option expenses		162,728		139,900		406,105			356,704
Amortization of RSU & PRSU expenses		135,093		-		270,186			-
		331,921		175,539		745,098			427,687
Stock-Based Compensation for Employees
Common stock issued to employees		129,997		124,872		258,025			248,695
Amortization of stock option expenses		156,628		186,806		393,419			467,154
		286,625		311,678		651,444			715,849
Settlement of share issuance obligation		-		-		(15,189	)		-
	$	798,250	$	747,342	$	1,715,636		$	1,588,866