Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)	At-the-market Offering [Member] Common Stock [Member]	At-the-market Offering [Member] Additional Paid-in Capital [Member]	At-the-market Offering [Member] Share Issuance Obligation [Member]	At-the-market Offering [Member] Retained Earnings [Member]	At-the-market Offering [Member] AOCI Attributable to Parent [Member]	At-the-market Offering [Member]	Direct Offering [Member] Common Stock [Member]	Direct Offering [Member] Additional Paid-in Capital [Member]	Direct Offering [Member] Share Issuance Obligation [Member]	Direct Offering [Member] Retained Earnings [Member]	Direct Offering [Member] AOCI Attributable to Parent [Member]	Direct Offering [Member]	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, 2020													184,635,870
Balance at Jul. 31, 2020													$ 184,636	$ 341,059,972	$ 103,554	$ (276,811,300)	$ (120,244)	$ 64,416,618
Issued upon exercise of stock options (in shares)													13,532
Issued upon exercise of stock options													$ 15	9,294				9,309
Common stock issued under Stock Incentive Plan (in shares)													227,390
Common stock issued under Stock Incentive Plan													$ 226	235,043	30,321			265,590
Amortization of stock-based compensation														1,046,175				1,046,175
Net income (loss) for the period																(4,963,537)		(4,963,537)
Other comprehensive income (loss)																	62,761	62,761
Issued for equity financing, net of issuance costs (in shares)													12,500,000
Issued for equity financing, net of issuance costs													$ 12,500	12,455,787				12,468,287
Issued for equity financing														1,518,432				1,518,432
Issued for equity financing as issuance costs														134,937				134,937
Balance (in shares) at Oct. 31, 2020													197,376,792
Balance at Oct. 31, 2020													$ 197,377	356,459,640	133,875	(281,774,837)	(57,483)	74,958,572
Balance (in shares) at Jul. 31, 2020													184,635,870
Balance at Jul. 31, 2020													$ 184,636	341,059,972	103,554	(276,811,300)	(120,244)	$ 64,416,618
Issued upon exercise of stock options (in shares)																		2,084,607
Net income (loss) for the period																		$ (13,014,757)
Other comprehensive income (loss)																		1,041,900
Balance (in shares) at Apr. 30, 2021													232,365,705
Balance at Apr. 30, 2021													$ 232,365	434,908,779	103,554	(289,826,057)	921,656	146,340,297
Balance (in shares) at Oct. 31, 2020													197,376,792
Balance at Oct. 31, 2020													$ 197,377	356,459,640	133,875	(281,774,837)	(57,483)	74,958,572
Issued under ATM offering, net of issuance costs (in shares)													632,487
Issued under ATM offering, net of issuance costs													$ 632	1,073,705				1,074,337
Issued upon exercise of stock options (in shares)													559,528
Issued upon exercise of stock options													$ 559	211,566	0	0	0	212,125
Issued upon exercise of warrants (in shares)													1,050
Issued upon exercise of warrants													$ 1	1,889				1,890
Common stock issued for consulting services (in shares)													0
Common stock issued for consulting services													$ 0	0	40,009			40,009
Common stock issued under Stock Incentive Plan (in shares)													323,660
Common stock issued under Stock Incentive Plan													$ 324	358,359	(30,321)	0	0	328,362
Amortization of stock-based compensation													0	836,569	0	0	0	836,569
Net income (loss) for the period													0	0	0	(3,461,059)	0	(3,461,059)
Other comprehensive income (loss)													$ 0	0	0	0	486,038	486,038
Issued as anniversary fees for credit facility (in shares)													1,249,039
Issued as anniversary fees for credit facility													$ 1,249	1,168,751	0	0	0	1,170,000
Balance (in shares) at Jan. 31, 2021													200,142,556
Balance at Jan. 31, 2021													$ 200,142	360,110,479	143,563	(285,235,896)	428,555	$ 75,646,843
Issued under ATM offering, net of issuance costs (in shares)	13,036,419						13,636,364
Issued under ATM offering, net of issuance costs	$ 13,036	$ 28,058,564	$ 0	$ 0	$ 0	$ 28,071,600	$ 13,636	$ 40,059,512	$ 0	$ 0	$ 0	$ 40,073,148
Issued upon exercise of stock options (in shares)													1,511,547					1,511,547
Issued upon exercise of stock options													$ 1,512	1,085,332	0	0	0	$ 1,086,844
Issued upon exercise of warrants (in shares)													3,598,200
Issued upon exercise of warrants													$ 3,598	3,395,705	0	0	0	3,399,303
Common stock issued for consulting services (in shares)													291,005
Common stock issued for consulting services													$ 291	890,482	(40,009)	0	0	850,764
Common stock issued under Stock Incentive Plan (in shares)													149,614
Common stock issued under Stock Incentive Plan													$ 150	307,981	0	0	0	308,131
Amortization of stock-based compensation													0	674,196	0	0	0	674,196
Net income (loss) for the period													0	0	0	(4,590,161)	0	(4,590,161)
Other comprehensive income (loss)													0	0	0	0	493,101	493,101
Issued for equity financing as issuance costs													$ 0	326,528	0	0	0	326,528
Balance (in shares) at Apr. 30, 2021													232,365,705
Balance at Apr. 30, 2021													$ 232,365	434,908,779	103,554	(289,826,057)	921,656	146,340,297
Balance (in shares) at Jul. 31, 2021													236,796,866
Balance at Jul. 31, 2021													$ 236,797	441,990,650	359,560	(291,625,110)	493,247	151,455,144
Issued under ATM offering, net of issuance costs (in shares)													20,743,878
Issued under ATM offering, net of issuance costs													$ 20,744	62,650,379				62,671,123
Issued upon exercise of stock options (in shares)													753,990
Issued upon exercise of stock options													$ 754	383,025				383,779
Issued upon exercise of warrants (in shares)													491,849
Issued upon exercise of warrants													$ 492	909,836				910,328
Issued for acquisition of mineral properties (in shares)													64,149
Issued for acquisition of mineral properties													$ 64	219,326				219,390
Common stock issued for consulting services (in shares)													4,607
Common stock issued for consulting services													$ 5	14,046				14,051
Common stock issued under Stock Incentive Plan (in shares)													141,490
Common stock issued under Stock Incentive Plan													$ 140	355,088				355,228
Amortization of stock-based compensation														803,160				803,160
Net income (loss) for the period																(2,073,826)		(2,073,826)
Other comprehensive income (loss)																	143,169	143,169
Balance (in shares) at Oct. 31, 2021													258,996,829
Balance at Oct. 31, 2021													$ 258,996	507,325,510	359,560	(293,698,936)	636,416	214,881,546
Balance (in shares) at Jul. 31, 2021													236,796,866
Balance at Jul. 31, 2021													$ 236,797	441,990,650	359,560	(291,625,110)	493,247	$ 151,455,144
Issued upon exercise of stock options (in shares)																		1,947,645
Net income (loss) for the period																		$ (203,355)
Other comprehensive income (loss)																		(613,935)
Balance (in shares) at Apr. 30, 2022													284,077,874
Balance at Apr. 30, 2022													$ 284,077	598,796,039	393,535	(291,828,465)	(120,688)	307,524,498
Balance (in shares) at Oct. 31, 2021													258,996,829
Balance at Oct. 31, 2021													$ 258,996	507,325,510	359,560	(293,698,936)	636,416	214,881,546
Issued under ATM offering, net of issuance costs (in shares)													17,751,658
Issued under ATM offering, net of issuance costs													$ 17,752	67,954,914	0	0	0	67,972,666
Issued upon exercise of stock options (in shares)													193,345
Issued upon exercise of stock options													$ 193	63,211	0	0	0	63,404
Issued upon exercise of warrants (in shares)													572,850
Issued upon exercise of warrants													$ 573	1,141,330	0	0	0	1,141,903
Issued for acquisition of mineral properties (in shares)													47,715
Issued for acquisition of mineral properties													$ 48	206,081	0	0	0	206,129
Common stock issued for consulting services (in shares)													4,608
Common stock issued for consulting services													$ 5	16,629	0	0	0	16,634
Common stock issued under Stock Incentive Plan (in shares)													109,986
Common stock issued under Stock Incentive Plan													$ 110	399,338	0	0	0	399,448
Amortization of stock-based compensation													0	653,997	0	0	0	653,997
Net income (loss) for the period													0	0	0	(5,474,267)	0	(5,474,267)
Other comprehensive income (loss)													$ 0	0	0	0	(617,910)	(617,910)
Issued as anniversary fees for credit facility (in shares)													161,594
Issued as anniversary fees for credit facility													$ 161	599,839	0	0	0	600,000
Balance (in shares) at Jan. 31, 2022													277,838,585
Balance at Jan. 31, 2022													$ 277,838	578,360,849	359,560	(299,173,203)	18,506	279,843,550
Issued under ATM offering, net of issuance costs (in shares)													4,800,000
Issued under ATM offering, net of issuance costs													$ 4,800	18,552,312	0	0	0	$ 18,557,112
Issued upon exercise of stock options (in shares)													1,000,310					1,000,310
Issued upon exercise of stock options													$ 1,000	402,949	0	0	0	$ 403,949
Issued upon exercise of warrants (in shares)													339,845
Issued upon exercise of warrants													$ 340	611,381	33,975	0	0	645,696
Common stock issued for consulting services (in shares)													2,854
Common stock issued for consulting services													$ 3	13,097	0	0	0	13,100
Common stock issued under Stock Incentive Plan (in shares)													96,280
Common stock issued under Stock Incentive Plan													$ 96	344,165	0	0	0	344,261
Amortization of stock-based compensation													0	511,286	0	0	0	511,286
Net income (loss) for the period													0	0	0	7,344,738	0	7,344,738
Other comprehensive income (loss)													$ 0	0	0	0	(139,194)	(139,194)
Balance (in shares) at Apr. 30, 2022													284,077,874
Balance at Apr. 30, 2022													$ 284,077	$ 598,796,039	$ 393,535	$ (291,828,465)	$ (120,688)	$ 307,524,498