SEGMENTED INFORMATION (Details) - USD ($)	Apr. 30, 2017	Jul. 31, 2016
Mineral Rights and Properties	$ 37,669,432	$ 37,973,951
Property, Plant and Equipment	6,804,599	6,942,304
Reclamation Deposits	1,706,027	1,706,027
Other Long-Term Assets	1,904,919	1,553,388
Total Long-Term Assets	48,084,977	48,175,670
United States Texas [Member]
Mineral Rights and Properties	12,950,966	13,191,408
Property, Plant and Equipment	6,441,203	6,573,079
Reclamation Deposits	1,690,209	1,690,209
Other Long-Term Assets	0	0
Total Long-Term Assets	21,082,378	21,454,696
United States Arizona [Member]
Mineral Rights and Properties	10,932,198	10,891,861
Property, Plant and Equipment	0	0
Reclamation Deposits	15,000	15,000
Other Long-Term Assets	0	0
Total Long-Term Assets	10,947,198	10,906,861
United States Other States [Member]
Mineral Rights and Properties	705,713	810,127
Property, Plant and Equipment	0	0
Reclamation Deposits	818	818
Other Long-Term Assets	351,531	0
Total Long-Term Assets	1,058,062	810,945
Canada [Member]
Mineral Rights and Properties	0	0
Property, Plant and Equipment	12,020	14,909
Reclamation Deposits	0	0
Other Long-Term Assets	0	0
Total Long-Term Assets	12,020	14,909
Paraguay [Member]
Mineral Rights and Properties	13,080,555	13,080,555
Property, Plant and Equipment	351,376	354,316
Reclamation Deposits	0	0
Other Long-Term Assets	1,553,388	1,553,388
Total Long-Term Assets	$ 14,985,319	$ 14,988,259