SEGMENTED INFORMATION (Details) - USD ($)	Apr. 30, 2018	Jul. 31, 2017
Mineral Rights and Properties	$ 65,125,223	$ 38,931,976
Property, Plant and Equipment	7,120,236	6,791,182
Reclamation Deposits	1,779,182	1,706,028
Equity-Accounted Investment	242,775	151,676
Other Long-Term Assets	889,028	1,004,975
Total Long-Term Assets	75,156,444	48,585,837
United States Texas [Member]
Mineral Rights and Properties	12,742,158	12,780,728
Property, Plant and Equipment	6,373,925	6,414,329
Reclamation Deposits	1,690,209	1,690,209
Equity-Accounted Investment	0	0
Other Long-Term Assets	460,821	422,769
Total Long-Term Assets	21,267,113	21,308,035
United States Arizona [Member]
Mineral Rights and Properties	11,044,018	10,932,199
Property, Plant and Equipment	0	0
Reclamation Deposits	15,000	15,000
Equity-Accounted Investment	0	0
Other Long-Term Assets	0	0
Total Long-Term Assets	11,059,018	10,947,199
United States Wyoming [Member]
Mineral Rights and Properties	25,553,807	0
Property, Plant and Equipment	361,113	0
Reclamation Deposits	73,973	0
Equity-Accounted Investment	0	0
Other Long-Term Assets	428,207	582,206
Total Long-Term Assets	26,417,100	582,206
United States Other States [Member]
Mineral Rights and Properties	724,717	705,464
Property, Plant and Equipment	0	0
Reclamation Deposits	0	819
Equity-Accounted Investment	0	0
Other Long-Term Assets	0	0
Total Long-Term Assets	724,717	706,283
Canada [Member]
Mineral Rights and Properties	546,938	0
Property, Plant and Equipment	28,709	11,185
Reclamation Deposits	0	0
Equity-Accounted Investment	242,775	151,676
Other Long-Term Assets	0	0
Total Long-Term Assets	818,422	162,861
Paraguay [Member]
Mineral Rights and Properties	14,513,585	14,513,585
Property, Plant and Equipment	356,489	365,668
Reclamation Deposits	0	0
Equity-Accounted Investment	0	0
Other Long-Term Assets	0	0
Total Long-Term Assets	$ 14,870,074	$ 14,879,253