v3.26.3
SEGMENT INFORMATION (Details)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Sep. 30, 2026
USD ($)
segment
Sep. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Segment Reporting [Abstract]          
Number of operating segments | segment     4    
Number of reportable segments | segment     4    
Segment Reporting [Line Items]          
Revenue $ 32,728 $ 32,019 $ 109,466 $ 73,903  
Pre-development, evaluation and exploration (33,355) (20,062) (88,317) (38,652)  
Property maintenance (4,914) (3,297) (13,902) (10,610)  
Adjusted (loss) income from operations (31,164) (18,130) (66,097) (37,650)  
Depreciation, depletion and amortization (581) (547) (1,636) (1,470)  
Royalties (1,570) (1,564) (4,835) (3,320)  
General and administrative (10,030) (7,526) (26,727) (19,853)  
Loss from operations (43,345) (27,767) (99,295) (62,293)  
Capital expenditures     56,787   $ 15,286
Total assets 1,155,702   1,155,702   703,420
Operating Segments | Granite Creek          
Segment Reporting [Line Items]          
Revenue 25,822 24,857 79,016 53,279  
Costs applicable to sales (22,822) (23,446) (60,656) (53,831)  
Pre-development, evaluation and exploration (5,505) (12,864) (24,782) (22,583)  
Property maintenance (197) (89) (595) (364)  
Adjusted (loss) income from operations (2,702) (11,542) (7,017) (23,499)  
Capital expenditures     18,583   5,045
Total assets 158,211   158,211   126,806
Operating Segments | Ruby Hill          
Segment Reporting [Line Items]          
Revenue 1,125 2,520 5,892 6,198  
Costs applicable to sales (923) (2,267) (4,475) (5,077)  
Pre-development, evaluation and exploration (26,903) (4,440) (59,369) (9,529)  
Property maintenance (1,458) (577) (3,966) (1,933)  
Adjusted (loss) income from operations (28,159) (4,764) (61,918) (10,341)  
Capital expenditures     6,751   2,314
Total assets 125,686   125,686   120,809
Operating Segments | Lone Tree          
Segment Reporting [Line Items]          
Revenue 5,781 4,642 24,558 14,426  
Costs applicable to sales (1,878) (1,077) (8,213) (3,383)  
Pre-development, evaluation and exploration (72) (6) (306) (39)  
Property maintenance (2,838) (2,276) (8,171) (7,194)  
Adjusted (loss) income from operations 993 1,283 7,868 3,810  
Capital expenditures     31,065   7,927
Total assets 284,055   284,055   240,986
Operating Segments | Cove          
Segment Reporting [Line Items]          
Revenue 0 0 0 0  
Costs applicable to sales 0 0 0 0  
Pre-development, evaluation and exploration (864) (2,694) (3,829) (6,415)  
Property maintenance (203) (190) (626) (598)  
Adjusted (loss) income from operations (1,067) (2,884) (4,455) (7,013)  
Capital expenditures     388   0
Total assets 53,998   53,998   53,307
Other          
Segment Reporting [Line Items]          
Revenue 0 0 0 0  
Costs applicable to sales 0 0 0 0  
Pre-development, evaluation and exploration (11) (58) (31) (86)  
Property maintenance (218) (165) (544) (521)  
Adjusted (loss) income from operations (229) $ (223) (575) $ (607)  
Capital expenditures     0   0
Total assets $ 533,752   $ 533,752   $ 161,512