Note 20 - Segmented Information - Operating Results by Geographic Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2020
Sales and service revenue	$ 23,161	$ 0	$ 0
COST OF SALES AND SERVICES	(15,868)	0	0
Gross profit	7,293	0	0
Mineral Property Expenditures	10,154	4,479	4,582
General and administrative	15,026	12,640	9,442
Acquisition-related costs	3,444	0	0
Depreciation, amortization and accretion	1,379	393	310
Total operating costs	30,003	17,512	14,334
Income (loss) from operations	(22,710)	(17,512)	(14,334)
Other income (expenses)	27,957	2,695	(282)
Income (loss) before income taxes	5,247	(14,817)	(14,616)
United States Texas [Member]
Sales and service revenue	0
COST OF SALES AND SERVICES	0
Gross profit	0
Mineral Property Expenditures	5,525	3,002	3,166
General and administrative	9,817	9,596	6,983
Acquisition-related costs	0
Depreciation, amortization and accretion	375	358	274
Total operating costs	15,717	12,956	10,423
Income (loss) from operations	(15,717)	(12,956)	(10,423)
Other income (expenses)	(1,096)	(2,542)	(3,418)
Income (loss) before income taxes	(16,813)	(15,498)	(13,841)
United States Arizona [Member]
Sales and service revenue	0
COST OF SALES AND SERVICES	0
Gross profit	0
Mineral Property Expenditures	156	125	104
General and administrative	15	15	14
Acquisition-related costs	0
Depreciation, amortization and accretion	0	0	0
Total operating costs	171	140	118
Income (loss) from operations	(171)	(140)	(118)
Other income (expenses)	(19)	(19)	(19)
Income (loss) before income taxes	(190)	(159)	(137)
United States Wyoming [Member]
Sales and service revenue	215
COST OF SALES AND SERVICES	(179)
Gross profit	36
Mineral Property Expenditures	3,117	672	597
General and administrative	922	86	112
Acquisition-related costs	3,444
Depreciation, amortization and accretion	983	15	15
Total operating costs	8,466	773	724
Income (loss) from operations	(8,430)	(773)	(724)
Other income (expenses)	6,074	(10)	2
Income (loss) before income taxes	(2,356)	(783)	(722)
United States Other States [Member]
Sales and service revenue	22,946
COST OF SALES AND SERVICES	(15,689)
Gross profit	7,257
Mineral Property Expenditures	72	69	70
General and administrative	1	2	2
Acquisition-related costs	0
Depreciation, amortization and accretion	0	0	1
Total operating costs	73	71	73
Income (loss) from operations	7,184	(71)	(73)
Other income (expenses)	0	0	0
Income (loss) before income taxes	7,184	(71)	(73)
CANADA
Sales and service revenue	0
COST OF SALES AND SERVICES	0
Gross profit	0
Mineral Property Expenditures	5	8	0
General and administrative	4,226	2,894	2,272
Acquisition-related costs	0
Depreciation, amortization and accretion	16	17	12
Total operating costs	4,247	2,919	2,284
Income (loss) from operations	(4,247)	(2,919)	(2,284)
Other income (expenses)	22,994	5,259	3,148
Income (loss) before income taxes	18,747	2,340	864
PARAGUAY
Sales and service revenue	0
COST OF SALES AND SERVICES	0
Gross profit	0
Mineral Property Expenditures	1,279	603	645
General and administrative	45	47	59
Acquisition-related costs	0
Depreciation, amortization and accretion	5	3	8
Total operating costs	1,329	653	712
Income (loss) from operations	(1,329)	(653)	(712)
Other income (expenses)	4	7	5
Income (loss) before income taxes	$ (1,325)	$ (646)	$ (707)