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Note 8 - Employee Benefit Plans (Detail) - Allocations Of Investments And Measurement Dates By Asset Category | Dec. 31, 2012 | Dec. 31, 2011
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Hecla [Member] | Cash [Member] |  |
Allocation Of Investment | 1.00% | 1.00%
Hecla [Member] | Large Cap U.S. Equities [Member] |  |
Allocation Of Investment | 11.00% | 13.00%
Hecla [Member] | Small Cap U.S. Equities [Member] |  |
Allocation Of Investment | 4.00% | 4.00%
Hecla [Member] | Foreign Government Debt Securities [Member] |  |
Allocation Of Investment | 10.00% | 9.00%
Hecla [Member] | Fixed Income Funds [Member] |  |
Allocation Of Investment | 33.00% | 37.00%
Hecla [Member] | Real Estate [Member] |  |
Allocation Of Investment | 18.00% | 13.00%
Hecla [Member] | Hedge Funds [Member] |  |
Allocation Of Investment | 13.00% | 13.00%
Hecla [Member] | Real Return [Member] |  |
Allocation Of Investment | 10.00% | 10.00%
Hecla [Member] |  |
Allocation Of Investment | 100.00% | 100.00%
Lucky Friday [Member] | Cash [Member] |  |
Allocation Of Investment | 1.00% | 1.00%
Lucky Friday [Member] | Large Cap U.S. Equities [Member] |  |
Allocation Of Investment | 9.00% | 12.00%
Lucky Friday [Member] | Small Cap U.S. Equities [Member] |  |
Allocation Of Investment | 5.00% | 4.00%
Lucky Friday [Member] | Foreign Government Debt Securities [Member] |  |
Allocation Of Investment | 10.00% | 9.00%
Lucky Friday [Member] | Fixed Income Funds [Member] |  |
Allocation Of Investment | 34.00% | 38.00%
Lucky Friday [Member] | Real Estate [Member] |  |
Allocation Of Investment | 17.00% | 13.00%
Lucky Friday [Member] | Hedge Funds [Member] |  |
Allocation Of Investment | 14.00% | 13.00%
Lucky Friday [Member] | Real Return [Member] |  |
Allocation Of Investment | 10.00% | 10.00%
Lucky Friday [Member] |  |
Allocation Of Investment | 100.00% | 100.00%

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- Definition Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e2446-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant