Note 1 - Basis of Preparation of Financial Statements	3 Months Ended
Mar. 31, 2022
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block]	Note 1. Basis of Preparation of Financial Statements The accompanying unaudited interim condensed consolidated financial statements of Hecla Mining Company and its subsidiaries (collectively, “Hecla,” “the Company,” “we,” “our,” or “us,” except where the context requires otherwise) have been prepared in accordance with the instructions to Form 10-Q and do not include all information and disclosures required annually by generally accepted accounting principles in the United States (“GAAP”). Therefore, this information should be read in conjunction with Hecla’s consolidated financial statements and notes contained in our annual report on Form 10-K for the year ended December 31, 2021 (“2021 Form 10-K”). The consolidated December 31, 2021 balance sheet data was derived from our audited consolidated financial statements. The information furnished herein reflects all adjustments that are, in the opinion of management, necessary for a fair statement of the results for the interim periods reported. All such adjustments are, in the opinion of management, of a normal recurring nature. Operating results for the three-month period ended March 31, 2022 are not necessarily indicative of the results that may be expected for the year ending December 31, 2022. The 2019 novel strain of coronavirus (“COVID-19”) was characterized as a global pandemic by the World Health Organization on March 11, 2020. We continue to take precautionary measures to mitigate the impact of COVID-19, including implementing operational plans and practices. As long as they are required, the operational practices implemented could continue to have an adverse impact on our operating results due to deferred production and revenues or additional costs. We incurred $0.4 million and $1.6 million in COVID-19 mitigation costs during the three months ended March 31, 2022 and 2021, respectively. We continue to monitor the rapidly evolving situation and guidance from federal, state, local and foreign governments and public health authorities and may take additional actions based on their recommendations. The extent of the impact of COVID-19 on our business and financial results will also depend on future developments, including the duration and spread of the outbreak and the success of the current vaccination programs and the related impact on prices, demand, creditworthiness and other market conditions and governmental reactions, all of which are highly uncertain. Certain amounts in the prior year have been reclassified to conform to the current year presentation.

Note 1 - Basis of Preparation of Financial Statements

3 Months Ended

Mar. 31, 2022

Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block]

Note 1. Basis of Preparation of Financial Statements

The accompanying unaudited interim condensed consolidated financial statements of Hecla Mining Company and its subsidiaries (collectively, “Hecla,” “the Company,” “we,” “our,” or “us,” except where the context requires otherwise) have been prepared in accordance with the instructions to Form 10-Q and do not include all information and disclosures required annually by generally accepted accounting principles in the United States (“GAAP”). Therefore, this information should be read in conjunction with Hecla’s consolidated financial statements and notes contained in our annual report on Form 10-K for the year ended December 31, 2021 (“2021 Form 10-K”). The consolidated December 31, 2021 balance sheet data was derived from our audited consolidated financial statements. The information furnished herein reflects all adjustments that are, in the opinion of management, necessary for a fair statement of the results for the interim periods reported. All such adjustments are, in the opinion of management, of a normal recurring nature. Operating results for the three-month period ended March 31, 2022 are not necessarily indicative of the results that may be expected for the year ending December 31, 2022.

The 2019 novel strain of coronavirus (“COVID-19”) was characterized as a global pandemic by the World Health Organization on March 11, 2020. We continue to take precautionary measures to mitigate the impact of COVID-19, including implementing operational plans and practices. As long as they are required, the operational practices implemented could continue to have an adverse impact on our operating results due to deferred production and revenues or additional costs. We incurred $0.4 million and $1.6 million in COVID-19 mitigation costs during the three months ended March 31, 2022 and 2021, respectively. We continue to monitor the rapidly evolving situation and guidance from federal, state, local and foreign governments and public health authorities and may take additional actions based on their recommendations. The extent of the impact of COVID-19 on our business and financial results will also depend on future developments, including the duration and spread of the outbreak and the success of the current vaccination programs and the related impact on prices, demand, creditworthiness and other market conditions and governmental reactions, all of which are highly uncertain.

Certain amounts in the prior year have been reclassified to conform to the current year presentation.