Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Share Issuance Obligation [Member]	Total
Balance (in shares) at Jul. 31, 2018	161,175,764
Balance at Jul. 31, 2018	$ 161,176	$ 308,062,379	$ (245,151,636)	$ 103,641		$ 63,175,560
Common stock issued for consulting services (in shares)	30,845
Common stock issued for consulting services	$ 31	50,682				50,713
Common stock issued under Stock Incentive Plan (in shares)	141,546
Common stock issued under Stock Incentive Plan	$ 141	239,114				239,255
Amortization of stock option expenses		551,556				551,556
Net loss for the period			(3,451,426)			(3,451,426)
Issued for equity financing, net of issuance costs (in shares)	12,613,049
Issued for equity financing, net of issuance costs	$ 12,613	15,978,349				15,990,962
Issued upon exercise of stock options (in shares)	100,422
Issued upon exercise of stock options	$ 100	72,262				72,362
Issued upon exercise of warrants (in shares)	2,061,764
Issued upon exercise of warrants	$ 2,062	2,494,555				2,496,617
Issued for equity financing		2,606,884				2,606,884
Issued for equity financing as issuance costs		371,366				371,366
Reclassification upon adoption of ASU No. 2016-01			103,641	(103,641)
Balance (in shares) at Oct. 31, 2018	176,123,390
Balance at Oct. 31, 2018	$ 176,123	330,427,147	(248,499,421)			82,103,849
Balance (in shares) at Jul. 31, 2018	161,175,764
Balance at Jul. 31, 2018	$ 161,176	308,062,379	(245,151,636)	103,641		63,175,560
Net loss for the period						(5,801,100)
Other comprehensive income (loss)						38,232
Balance (in shares) at Jan. 31, 2019	177,642,699
Balance at Jan. 31, 2019	$ 177,643	332,600,628	(250,849,095)	38,232		81,967,408
Balance (in shares) at Oct. 31, 2018	176,123,390
Balance at Oct. 31, 2018	$ 176,123	330,427,147	(248,499,421)			82,103,849
Common stock issued for consulting services (in shares)	98,861
Common stock issued for consulting services	$ 98	127,643				127,741
Common stock issued under Stock Incentive Plan (in shares)	223,156
Common stock issued under Stock Incentive Plan	$ 225	290,013				290,238
Amortization of stock option expenses		357,022				357,022
Net loss for the period			(2,349,674)			(2,349,674)
Other comprehensive income (loss)				38,232		38,232
Issued for credit facility (in shares)	1,180,328
Issued for credit facility	$ 1,180	1,398,820				1,400,000
Issued upon exercise of stock options (in shares)	16,964
Issued upon exercise of stock options	$ 17	(17)
Balance (in shares) at Jan. 31, 2019	177,642,699
Balance at Jan. 31, 2019	$ 177,643	332,600,628	(250,849,095)	38,232		81,967,408
Balance (in shares) at Jul. 31, 2019	180,896,431
Balance at Jul. 31, 2019	$ 180,896	336,047,595	(262,200,784)	12,461	$ 187,100	74,227,268
Common stock issued for consulting services (in shares)	29,167
Common stock issued for consulting services	$ 29	31,763				31,792
Common stock issued under Stock Incentive Plan (in shares)	435,348
Common stock issued under Stock Incentive Plan	$ 436	410,026			(187,100)	223,362
Amortization of stock option expenses		662,232				662,232
Net loss for the period			(5,042,577)			(5,042,577)
Other comprehensive income (loss)				(9,894)		(9,894)
Balance (in shares) at Oct. 31, 2019	181,360,946
Balance at Oct. 31, 2019	$ 181,361	337,151,616	(267,243,361)	2,567		70,092,183
Balance (in shares) at Jul. 31, 2019	180,896,431
Balance at Jul. 31, 2019	$ 180,896	336,047,595	(262,200,784)	12,461	187,100	74,227,268
Net loss for the period						(6,931,238)
Other comprehensive income (loss)						(49,542)
Balance (in shares) at Jan. 31, 2020	183,673,815
Balance at Jan. 31, 2020	$ 183,674	339,570,053	(269,132,022)	(37,081)		70,584,624
Balance (in shares) at Oct. 31, 2019	181,360,946
Balance at Oct. 31, 2019	$ 181,361	337,151,616	(267,243,361)	2,567		70,092,183
Common stock issued for consulting services (in shares)	313,201
Common stock issued for consulting services	$ 313	277,644				277,957
Common stock issued under Stock Incentive Plan (in shares)	256,206
Common stock issued under Stock Incentive Plan	$ 257	234,535				234,792
Amortization of stock option expenses		485,268				485,268
Net loss for the period			(1,888,661)			(1,888,661)
Other comprehensive income (loss)				(39,648)		$ (39,648)
Issued for credit facility (in shares)	1,743,462					1,743,462
Issued for credit facility	$ 1,743	1,398,257				$ 1,400,000
Issued for consulting services, warrants		22,733				22,733
Balance (in shares) at Jan. 31, 2020	183,673,815
Balance at Jan. 31, 2020	$ 183,674	$ 339,570,053	$ (269,132,022)	$ (37,081)		$ 70,584,624