Note 18 - Supplemental Cash Flow Information (Details Textual) - USD ($)		12 Months Ended
	Aug. 07, 2019	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2017
Stock Issued During Period, Shares, Issued for Services		165,404	225,168	865,386
Stock Issued During Period, Value, Issued for Services		$ 226,539	$ 349,834	$ 1,107,937
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture, Total		$ 1,361,944	$ 1,711,579	$ 1,584,394
Stock Issued, Shares Issued For Extension Fees		1,180,328
Stock Issued Value Issued For Extension Fees		$ 1,400,000
Stock Issued During Period, Shares, Credit Facility			641,574	738,503
Stock Issued During Period, Value ,Credit Facility		1,400,000	$ 900,000	$ 1,100,000
Interest Paid, Excluding Capitalized Interest, Operating Activities		$ 1,622,222	1,622,222	1,622,222
Stock Issued During the Period, Shares, Issued in Exchange for Warrants		750,000
Fair Value Common Shares Issued for Warrants Exchanged		$ 997,500
Number of Warrants Exchanged for Common Shares		11,000,000
Class of Warrant or Right Cancelled, Weighted Average Exercise Price		$ 2.30
Share Issuance Obligation Amount		$ 187,100
Stock Issued During Period, Value, For Settlement of Current Liabilities			$ 845,824	$ 1,524,650
Workman Creek Project [Member]
Stock Issued During the Period, Shares, for Mineral Properties Royalty Payments			46,134	46,800
Stock Issued During the Period, Value for Mineral Properties Royalty Payments			$ 61,820	$ 48,672
Various Venders [Member]
Stock Issued During Period, Shares, For Settlement of Current Liabilities			565,499	351,061
Stock Issued During Period, Value, For Settlement of Current Liabilities			$ 845,824	$ 454,195
Reno Creek Project [Member]
Stock Issued During Period, Shares, Acquisitions	14,392,927		14,634,748
Payments to Acquire Businesses, Gross			$ 909,930
Stock Issued During Period, Shares, Issued for Reimbursable Acquisition Expenses			353,160
Stock Issued During Period, Value, Issued for Reimbursable Acquisition Expenses			$ 483,829
Stock Issued During Period, Shares, Transaction Costs			217,702
Stock Issued During Period, Value, Transaction Costs			$ 283,013
Stock Issued During Period, Value, Acquisitions			$ 20,332,617
North Reno Creek Project [Member]
Stock Issued During Period, Shares, Acquisitions			1,625,531
Stock Issued During Period, Shares, Transaction Costs			65,684
Stock Issued During Period, Value, Transaction Costs			$ 105,751
Asset Acquisition Consideration Transferred Equity Interests Issued			2,617,105
Payments to Acquire Assets, Gross			2,940,000
Stock Issued During Period, Value, Acquisitions			$ 2,722,856
Diabase Project [Member]
Stock Issued During Period, Shares, Acquisitions			164,767
Payments to Acquire Assets, Gross			$ 239,120
Stock Issued During Period, Value, Acquisitions			$ 232,321
The 2017 Stock Incentive Plan [Member]
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture, Total			398,839
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture, Total			$ 510,528
Share Issuance Obligation Amount			638,142
Royalty Purchase Agreement [Member] | Uranium Royalty Corp [Member]
Number Of Shares Acquired Through Sale Of Royalties		12,000,000
Consideration Shares, Fair Value		$ 9,077,842
Surety Bond [Member]
Payment of Bond Premiums		$ 113,117	$ 118,944	$ 117,069
Certain Management, Employees and Consultants of the Company [Member]
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture, Total		888,126	1,265,446	846,069
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture, Total		$ 1,174,844	$ 1,839,193	$ 967,369