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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS    
Sales, net $ 3,200 $ 6,536
Mine cost of sales:    
Production costs 743 2,263
Depreciation and amortization 245 887
Reclamation and remediation 24 51
Total mine cost of sales 1,012 3,201
Mine gross profit 2,188 3,335
Costs and expenses:    
General and administrative expenses 2,206 1,276
Exploration expenses 1,676 1,382
Facilities and mine construction 183  
Other expense (income), net 44 (572)
Total costs and expenses 4,109 2,086
(Loss) income before income and mining taxes (1,921) 1,249
Mining and income tax expense 0 0
Net (loss) income (1,921) 1,249
Net loss (income) attributable to noncontrolling interest 291 0
Net (loss) income attributable to Fortitude Shareholders $ (1,630) $ 1,249
Net (loss) income per common share attributable to Fortitude Shareholders:    
Basic (in dollars per share) $ (0.06) $ 0.05
Diluted (in dollars per share) $ (0.06) $ 0.05
Weighted average shares outstanding:    
Basic (in shares) 25,832,987 24,173,209
Diluted (in shares) 25,832,987 24,518,364