Note 20 - Segmented Information - Long-term Assets by Geographic Segments (Details) - USD ($) $ in Thousands	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2020
Mineral Rights and Properties	$ 181,948	$ 63,784
Property, Plant and Equipment	20,234	7,358
Restricted Cash	7,251	2,038	$ 1,839
Equity-Accounted Investment	24,177	20,730
Investment in Equity Securities	14,834	0
Other Non-Current Assets	3,612	586
Total Long-Term Assets	252,056	94,496
United States Texas [Member]
Mineral Rights and Properties	12,420	12,421
Property, Plant and Equipment	7,068	6,646
Restricted Cash	1,949	1,949
Equity-Accounted Investment	0	0
Investment in Equity Securities	0
Other Non-Current Assets	1,447	522
Total Long-Term Assets	22,884	21,538
United States Arizona [Member]
Mineral Rights and Properties	4,727	4,627
Property, Plant and Equipment	0	0
Restricted Cash	15	15
Equity-Accounted Investment	0	0
Investment in Equity Securities	0
Other Non-Current Assets	0	0
Total Long-Term Assets	4,742	4,642
United States Wyoming [Member]
Mineral Rights and Properties	148,720	31,528
Property, Plant and Equipment	12,773	313
Restricted Cash	5,287	74
Equity-Accounted Investment	0	0
Investment in Equity Securities	0
Other Non-Current Assets	1,646	16
Total Long-Term Assets	168,426	31,931
United States Other States [Member]
Mineral Rights and Properties	85	147
Property, Plant and Equipment	0	0
Restricted Cash	0	0
Equity-Accounted Investment	0	0
Investment in Equity Securities	0
Other Non-Current Assets	0	0
Total Long-Term Assets	85	147
CANADA
Mineral Rights and Properties	982	547
Property, Plant and Equipment	26	34
Restricted Cash	0	0
Equity-Accounted Investment	24,177	20,730
Investment in Equity Securities	14,834
Other Non-Current Assets	519	48
Total Long-Term Assets	40,538	21,359
PARAGUAY
Mineral Rights and Properties	15,014	14,514
Property, Plant and Equipment	367	365
Restricted Cash	0	0
Equity-Accounted Investment	0	0
Investment in Equity Securities	0
Other Non-Current Assets	0	0
Total Long-Term Assets	$ 15,381	$ 14,879