Note 17 - Segmented Information - Long-term Assets by Geographic Segments (Details) - USD ($)	Jul. 31, 2021	Jul. 31, 2020	Jul. 30, 2020	Jul. 31, 2019
Mineral Rights and Properties	$ 63,784,003	$ 63,655,503	$ 63,655,503
Property, Plant and Equipment	7,358,037	7,019,817	7,019,817
Restricted Cash	2,037,677	1,839,216	1,839,216	$ 1,821,392
Equity-Accounted Investment	20,729,674	11,515,327	11,515,327
Other Non-Current Assets	586,332	$ 769,875	769,875
Total Long-Term Assets	94,495,723		84,799,738
United States Texas [Member]
Mineral Rights and Properties	12,421,161		12,422,661
Property, Plant and Equipment	6,645,905		6,299,786
Restricted Cash	1,948,704		1,750,243
Equity-Accounted Investment
Other Non-Current Assets	522,306		703,312
Total Long-Term Assets	21,538,076		21,176,002
United States Arizona [Member]
Mineral Rights and Properties	4,627,477		4,527,477
Property, Plant and Equipment
Restricted Cash	15,000		15,000
Equity-Accounted Investment
Other Non-Current Assets
Total Long-Term Assets	4,642,477		4,542,477
United States Wyoming [Member]
Mineral Rights and Properties	31,527,870		31,527,870
Property, Plant and Equipment	312,763		327,639
Restricted Cash	73,973		73,973
Equity-Accounted Investment
Other Non-Current Assets	16,000		22,000
Total Long-Term Assets	31,930,606		31,951,482
United States Other States [Member]
Mineral Rights and Properties	146,971		116,971
Property, Plant and Equipment
Restricted Cash
Equity-Accounted Investment
Other Non-Current Assets
Total Long-Term Assets	146,971		116,971
CANADA
Mineral Rights and Properties	546,938		546,938
Property, Plant and Equipment	34,036		29,677
Restricted Cash
Equity-Accounted Investment	20,729,674		11,515,327
Other Non-Current Assets	48,026		44,563
Total Long-Term Assets	21,358,674		12,136,505
PARAGUAY
Mineral Rights and Properties	14,513,586		14,513,586
Property, Plant and Equipment	365,333		362,715
Restricted Cash
Equity-Accounted Investment
Other Non-Current Assets
Total Long-Term Assets	$ 14,878,919		$ 14,876,301