Note 11 - Commitments and Contingencies (Details Textual) - USD ($)		1 Months Ended	9 Months Ended
	Jul. 15, 2012	Jul. 31, 2008	Mar. 31, 2020	Feb. 28, 2019
Contingent Salary and Compensation, Retention Agreement				$ 1,500,000
Chief Executive Officer [Member]
Contingent Salary and Compensation, Retention Agreement				1,000,000
Chief Financial Officer [Member]
Contingent Salary and Compensation, Retention Agreement				$ 250,000
Tetlin Lease [Member]
Inception-to-date Payments to Reduce Royalty Rate			$ 225,000
Decrease in Royalty Rates			0.75%
Tetlin Lease [Member] | Scenario 1 [Member]
Increase in Royalty Rates			0.25%
Payment that Lessor May Pay to Lessee to Increase Royalty Rate			$ 150,000
Tetlin Lease [Member] | Scenario 2 [Member]
Increase in Royalty Rates			0.50%
Payment that Lessor May Pay to Lessee to Increase Royalty Rate			$ 300,000
Tetlin Lease [Member] | Scenario 3 [Member]
Increase in Royalty Rates			0.75%
Payment that Lessor May Pay to Lessee to Increase Royalty Rate			$ 450,000
Tetlin Lease [Member] | Minimum [Member]
Advance Royalties to Be Paid Per Year	$ 75,000		$ 50,000
Tetlin Lease [Member] | The Joint Venture Company [Member]
Contractual Annual Exploration Costs		$ 350,000
Tetlin Lease [Member] | The Joint Venture Company [Member] | Minimum [Member]
Royalty Rate		2.00%	1.25%
Tetlin Lease [Member] | The Joint Venture Company [Member] | Maximum [Member]
Royalty Rate		5.00%	4.25%
Tetlin Lease and Certain Other Properties [Member]
Annual Claim Rentals			$ 323,248
Tetlin Lease and Certain Other Properties [Member] | The Joint Venture Company [Member] | Royal Gold [Member]
Overriding Royalty Interest			3.00%
Additional Properties [Member] | The Joint Venture Company [Member] | Royal Gold [Member]
Overriding Royalty Interest			2.00%
Native Village of Tetlin Land [Member]
Initial Term of Leases and Concessions on Undeveloped Acreage (Year)		10 years
Extension of Term of Leases and Concessions on Undeveloped Acreage (Year)		10 years