CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Share Issuance Obligation [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]
Balance at Jul. 31, 2017	$ 46,135,405	$ 139,815	$ 272,697,152	$ 638,142	$ (227,325,002)	$ (14,702)
Balance (in shares) at Jul. 31, 2017		139,815,124
Balance at Jul. 31, 2017	46,135,405	$ 139,815	272,697,152	638,142	(227,325,002)	(14,702)
Balance (in shares) at Jul. 31, 2017		139,815,124
Common stock Issued upon exercise of stock options	103,300	$ 252	103,048	0	0	0
Common stock Issued upon exercise of stock options (in shares)		250,932
Common stock Issued for Reno Creek Acquisition	20,332,617	$ 14,853	20,317,764	0	0	0
Common stock Issued for Reno Creek Acquisition (in shares)		14,852,450
Common stock Issued for Reimbursable Expenses for Reno Creek Acquisition	483,829	$ 353	483,476	0	0	0
Common stock Issued for Reimbursable Expenses for Reno Creek Acquisition (in shares)		353,160
Common stock Issued for mineral property	61,820	$ 46	61,774	0	0	0
Common stock Issued for mineral property (in shares)		46,134
Common stock Issued for settlement of liabilities	141,678	$ 105	141,573	0	0	0
Common stock Issued for settlement of liabilities (in shares)		104,706
Stock-based compensation Common stock issued for consulting services	284,306	$ 179	284,127	0	0	0
Stock-based compensation Common stock issued for consulting services (in shares)		180,378
Stock-based compensation Common stock issued under 2017 Stock Incentive Plan	488,854	$ 850	1,126,146	(638,142)	0	0
Stock-based compensation Common stock issued under 2017 Stock Incentive Plan (in shares)		849,940
Stock-based compensation Stock options issued to consultants	341,619	$ 0	341,619	0	0	0
Stock-based compensation Stock options issued to management	180,981	0	180,981	0	0	0
Stock-based compensation Stock options issued to employees	334,731	0	334,731	0	0	0
Warrants Issued in connection with Reno Creek Acquisition	5,088,928	0	5,088,928	0	0	0
Net loss for the period	(8,909,653)	0	0	0	(8,909,653)	0
Other comprehensive income	136	0	0	0	0	136
Balance at Jan. 31, 2018	65,068,551	$ 156,453	301,161,319	0	(236,234,655)	(14,566)
Balance (in shares) at Jan. 31, 2018		156,452,824
Net loss for the period	(4,353,813)
Balance at Jan. 31, 2018	$ 65,068,551	$ 156,453	$ 301,161,319	$ 0	$ (236,234,655)	$ (14,566)
Balance (in shares) at Jan. 31, 2018		156,452,824