Consolidated Statements of Stockholders' Equity - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Share Issuance Obligation [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [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)
Other comprehensive loss
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, 2019	180,896,431
Balance at Jul. 31, 2019	$ 180,896	336,047,595	187,100	(262,200,784)	12,461	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 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