v3.26.1
Note 6 - Employee Benefit Plans (Details Textual) - USD ($)
$ in Millions
 2 Months Ended 12 Months Ended
Feb. 17, 2022
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]        
Expected rate of return on plan assets 7.25% 7.25% 7.25%  
Defined Benefit Plan Assumed Long Term Rate Basis Spread   1.00%    
Defined Contribution Plan, Employer Matching Contribution, Percent of Match   100.00%    
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay   6.00%    
Defined Benefit Plan, Plan Assets, Contributions by Employer   $ 1.9 $ 1.6 $ 1.3
Pension plans        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Plan Assets, Contributions by Employer   0.2    
Hecla Plans | Common Stock [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Common stock investments   18.5 18.9  
Lucky Friday plan | Common Stock [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Common stock investments   3.0 2.9  
Location, Statement of Income, Balance [Axis]: us-gaap:NonoperatingIncomeExpense        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Except Service cost   0.3 3.9 4.1
Capital Accumulation 401(K) Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Plan Assets, Contributions by Employer   $ 5.1 $ 4.8 $ 4.6
Defined Contribution Plan, Employer Matching Contribution, Percent of Match   100.00%    
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay   6.00%