Note 4 - Mineral Rights and Properties (Details Textual) - USD ($)		3 Months Ended		6 Months Ended
	Dec. 04, 2018	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2019	Jan. 31, 2018
Annual Property Maintenance Fees		$ 2,484,000		$ 2,484,000
Consideration Shares, Fair Value, Net				9,022,055
Gain (Loss) on Disposition of Assets, Total		1,583,764	$ (474)	1,583,764	$ (474)
Common Stock [Member]
Stock Issued During Period, Shares, Settlement Of Reimbursable Expenses			353,160		353,160
Stock Issued During Period, Value, Settlement of Reimbursable Expenses			$ 483,829		$ 483,829
Palangana Mine [Member]
Depletion, Total		0	$ 0	0	$ 0
Anderson Project [Member]
Increase (Decrease) in Carrying Value Due to Disposition of Asset				(5,683,895)
Consideration Shares, Fair Value, Net				5,683,895
Workman Creek Project [Member]
Increase (Decrease) In Carrying Amount Due To Allocation				(1,082,646)
Consideration Shares, Fair Value, Net				1,082,646
Slick Rock Project [Member]
Increase (Decrease) In Carrying Amount Due To Allocation				(676,650)
Consideration Shares, Fair Value, Net				2,255,514
Gain (Loss) on Disposition of Assets, Total		$ 1,578,864		$ 1,578,864
Royalty Purchase Agreement [Member] | Uranium Royalty Corp [Member]
Royalties Percentage				1.00%
Number Of Shares Acquired Through Sale Of Royalties	12,000,000	12,000,000		12,000,000
Consideration Shares, Fair Value	$ 9,077,842			$ 9,077,842
Consideration Shares, Transaction Cost				55,787
Consideration Shares, Fair Value, Net				$ 9,022,055