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Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Hecla Mining Company Retirement Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | $ 57,673 | $ 58,918
Lucky Friday Pension Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | 15,648 | 15,633
Interest-bearing Deposits [Member] | Hecla Mining Company Retirement Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | 936 | 1,798
Interest-bearing Deposits [Member] | Lucky Friday Pension Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | 76 | 136
Common Stock [Member] | Hecla Mining Company Retirement Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | 3,284 | 1,105
Common Stock [Member] | Lucky Friday Pension Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | 989 | 281
Real Estate Investments [Member] | Hecla Mining Company Retirement Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | 10,326 | 8,889
Real Estate Investments [Member] | Lucky Friday Pension Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | 2,856 | 2,458
Common Collective Funds [Member] | Hecla Mining Company Retirement Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | 14,324 | 20,734
Common Collective Funds [Member] | Lucky Friday Pension Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | 3,882 | 5,346
Mutual Funds [Member] | Hecla Mining Company Retirement Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | 28,803 | 26,392
Mutual Funds [Member] | Lucky Friday Pension Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | 7,845 | 7,412
Fair Value, Inputs, Level 1 [Member] | Hecla Mining Company Retirement Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | 33,023 | 29,295
Fair Value, Inputs, Level 1 [Member] | Lucky Friday Pension Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | 8,910 | 7,829
Fair Value, Inputs, Level 1 [Member] | Interest-bearing Deposits [Member] | Hecla Mining Company Retirement Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | 936 | 1,798
Fair Value, Inputs, Level 1 [Member] | Interest-bearing Deposits [Member] | Lucky Friday Pension Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | 76 | 136
Fair Value, Inputs, Level 1 [Member] | Common Stock [Member] | Hecla Mining Company Retirement Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | 3,284 | 1,105
Fair Value, Inputs, Level 1 [Member] | Common Stock [Member] | Lucky Friday Pension Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | 989 | 281
Fair Value, Inputs, Level 1 [Member] | Mutual Funds [Member] | Hecla Mining Company Retirement Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | 28,803 | 26,392
Fair Value, Inputs, Level 1 [Member] | Mutual Funds [Member] | Lucky Friday Pension Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | 7,845 | 7,412
Fair Value, Inputs, Level 2 [Member] | Hecla Mining Company Retirement Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | 9,862 | 12,280
Fair Value, Inputs, Level 2 [Member] | Lucky Friday Pension Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | 2,573 | 3,040
Fair Value, Inputs, Level 2 [Member] | Common Collective Funds [Member] | Hecla Mining Company Retirement Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | 9,862 | 12,280
Fair Value, Inputs, Level 2 [Member] | Common Collective Funds [Member] | Lucky Friday Pension Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | 2,573 | 3,040
Fair Value, Inputs, Level 3 [Member] | Hecla Mining Company Retirement Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | 14,788 | 17,343
Fair Value, Inputs, Level 3 [Member] | Lucky Friday Pension Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | 4,165 | 4,764
Fair Value, Inputs, Level 3 [Member] | Real Estate Investments [Member] | Hecla Mining Company Retirement Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | 10,326 | 8,889
Fair Value, Inputs, Level 3 [Member] | Real Estate Investments [Member] | Lucky Friday Pension Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | 2,856 | 2,458
Fair Value, Inputs, Level 3 [Member] | Common Collective Funds [Member] | Hecla Mining Company Retirement Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | 4,462 | 8,454
Fair Value, Inputs, Level 3 [Member] | Common Collective Funds [Member] | Lucky Friday Pension Plan [Member] |  |
Note 8 - Employee Benefit Plans (Details) - Fair Value by Asset Category [Line Items] |  |
Assets, fair value | $ 1,309 | $ 2,306

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