Note 3 - Properties, Plants, Equipment and Mineral Interests, and Lease Commitments (Details)	7 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2013 CAD	Sep. 30, 2013 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2013 Lucky Friday [Member] USD ($)	Dec. 31, 2013 Greens Creek [Member] USD ($)	Dec. 31, 2013 Casa Berardi [Member] USD ($)	Dec. 31, 2013 Aurizon Mines Ltd [Member] USD ($)	Dec. 31, 2013 Aurizon Mines Ltd [Member] CAD
Note 3 - Properties, Plants, Equipment and Mineral Interests, and Lease Commitments (Details) [Line Items]
Total Capital Expenditures Excluding Capital Leases			$ 150,700,000			$ 54,500,000	$ 46,100,000	$ 41,400,000
Business Combination, Consideration Transferred (in Dollars)	740,800,000	714,513,000							714,500,000	740,800,000
Business Combination, Consideration Transferred	740,800,000	714,513,000							714,500,000	740,800,000
Capital Leased Assets, Gross			41,200,000	28,900,000
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation			10,100,000	5,300,000
Operating Leases, Rent Expense			$ 3,100,000	$ 3,100,000	$ 3,000,000