v3.26.1
Note 13 - Stockholders' Equity (Details Textual)
 1 Months Ended 3 Months Ended 12 Months Ended
Feb. 28, 2026
USD ($)
Sep. 30, 2021
$ / shares
Mar. 31, 2026
USD ($)
$ / shares
shares
Mar. 31, 2025
USD ($)
Dec. 31, 2020
$ / shares
Dec. 31, 2025
USD ($)
Director
$ / shares
shares
Dec. 31, 2024
USD ($)
$ / shares
shares
Dec. 31, 2023
USD ($)
$ / shares
shares
Dec. 31, 2020
$ / shares
Dec. 31, 2019
$ / shares
May 21, 2025
shares
Dec. 31, 2022
$ / shares
Feb. 18, 2021
shares
Sep. 30, 2020
$ / shares
Jul. 20, 2018
shares
May 08, 2012
shares
Dec. 31, 2010
shares
Jun. 30, 2010
shares
Common Stock, Dividends, Per Share, Declared (in dollars per share) | $ / shares         $ 0.015 $ 0.01       $ 0.01                
Dividend per share | $ / shares   $ 0.01 $ 0.00375                              
Average Realized Silver Price, Minimum Dividend, Threshold (in dollars per share) | $ / shares                   $ 30       $ 25        
Common stock, shares authorized (in shares) | shares     1,250,000,000     1,250,000,000 1,250,000,000                      
Average Realized Silver Price Per Ounce (in dollars per share) | $ / shares   $ 20             $ 25                  
Stock Issued During Period, Shares, New Issues (in shares) | shares             1,488,050                      
Share Price (in dollars per share) | $ / shares           $ 0                        
Series B preferred stock, shares outstanding (in shares) | shares     153,956     153,956 157,756                      
Percent of Shareholders' Consent Needed to Create or Issue Stock Ranking Senior to Series B Preferred Stock           66.00%                        
Preferred stock, dividends declared (Quarterly) | $     $ 132,000 $ 138,000   $ 552,000 $ 552,000 $ 552,000                    
Series B preferred stock, liquidation preference | $     7,698,000     7,698,000 $ 7,698,000                      
Share-based Payment Arrangement, Expense | $     2,800,000 $ 1,900,000                            
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total | $     $ 8,100,000     $ 7,400,000                        
Share-based Compensation Arrangement by Share-based Payment Award, Measurement Period Used to Value Performance-based Awards (Year)           3 years                        
warrant holder | shares             2,068,000                      
Warrants exercise price per share | $ / shares     $ 8.02     $ 8.02                        
Convertible Preferred Stock, Shares | shares           3,541                        
Common stock issued upon conversion of series B preffered stock | shares     64,000     11,385 64                      
Unrecognized Tax Benefits, Interest on Income Taxes Expense | $           $ 10,200,000                        
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition     1 year 4 months 24 days     1 year 7 months 6 days                        
Restricted Stock Units Vested | $           $ 5,500,000 $ 4,700,000 $ 4,600,000                    
Distributed | $ $ 6,800,000           $ 700,000                      
Satisfy Withholding Obligations [Member]                                    
Treasury Stock Acquired, Average Cost Per Share (in dollars per share) | $ / shares           $ 5.82 $ 4.31 $ 5.03                    
Stock Repurchased During Period, Shares (in shares) | shares           151,976 277,966,000 404,514                    
Stock Repurchased During Period, Value | $           $ 900,000 $ 1,200,000 $ 2,000,000                    
Warrants in Connection with Klondex Mines Acquisition [Member]                                    
Class of Warrant or Right, Issued During Period (in shares) | shares           2,068,000 2,068,000                      
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) | shares                             1      
Warrants exercise price per share | $ / shares             $ 1.57                      
2010 Stock Incentive Plan [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares) | shares                                   20,000,000
Number of shares reserve for future issuance | shares                                 20,000,000  
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares) | shares           7,435,880                        
Directors Stock Plan [Member]                                    
Number of distributed shares | shares           246,673                        
Number of directors | Director           1                        
Share-based Payment Arrangement, Expense | $           $ 1,000,000 $ 800,000 $ 700,000                    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares) | shares           1,874,764                        
Share-Based Compensation Arrangement by Share-Based Payment Award, Method of Measuring Cost of Award Participant, Numerator | $           $ 125,000,000                        
Shares Issued, Shares, Share-based Payment Arrangement, before Forfeiture (in shares) | shares           165,025 150,387 125,063                    
Share-Based Payment Arrangement [Member]                                    
Share-based Payment Arrangement, Expense | $           $ 10,900,000 $ 8,700,000 $ 6,600,000                    
Performance Shares [Member]                                    
Unrecognized Tax Benefits, Interest on Income Taxes Expense | $           $ 900,000                        
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition           1 year 7 months 6 days                        
Series B Preferred Stock [Member]                                    
Series B preferred stock, shares outstanding (in shares) | shares           153,956 157,756                      
Preferred Stock, Dividend Rate, Per-Dollar-Amount (in dollars per share) | $ / shares           $ 3.5                        
Preferred stock, dividends declared (Quarterly) | $           $ 552,000 $ 552,000 552,000                    
Preferred Stock, Redemption Price Per Share (in dollars per share) | $ / shares           $ 50                        
Preferred Stock, Liquidation Preference Per Share (in dollars per share) | $ / shares                       $ 50            
Series B preferred stock, liquidation preference | $           $ 7,700,000                        
Preferred Stock Conversion Price (in dollars per share) | $ / shares           $ 15.55                        
Common Stock Repurchase Program [Member]                                    
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares) | shares                               20,000,000    
Cumulative Stock Repurchased (in shares) | shares           934,100                        
Treasury Stock Acquired, Average Cost Per Share (in dollars per share) | $ / shares           $ 3.99                        
At The Market Equity Distribution Agreement [Member]                                    
Redeem of Senior Notes | $           $ 212,000,000                        
At-the-market Offering [Member]                                    
Equity Distribution Agreement, Maximum Number of Shares to be Sold (in shares) | shares           35,959,328             60,000,000          
At-the-market Offering [Member] | September 2022 through December 31, 2025 [Member]                                    
Equity Distribution Agreement, Maximum Number of Shares to be Sold (in shares) | shares           59,802,012                        
Proceeds from Issuance or Sale of Equity | $           $ 348,500,000                        
Payments of Stock Issuance Costs | $           5,400,000                        
At-the-market Offering [Member] | At The Market Equity Distribution Agreement [Member]                                    
Proceeds from Issuance or Sale of Equity | $           216,200,000                        
Payments of Stock Issuance Costs | $           3,300,000                        
Minimum [Member]                                    
Common stock, shares authorized (in shares) | shares                     750,000,000              
Maximum [Member]                                    
Common stock, shares authorized (in shares) | shares                     1,250,000,000              
O2024Q4Dividends [Member]                                    
Dividends, Common Stock, Total | $           $ 10,300,000                        
O2023Q4Dividends [Member]                                    
Dividends, Common Stock, Total | $               $ 15,700,000                    
O2022Q4Dividends [Member]                                    
Dividends, Common Stock, Total | $             $ 25,500,000