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Property, Plant and Equipment
 9 Months Ended
Sep. 30, 2025
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment PROPERTY, PLANT AND EQUIPMENT:
Property, plant and equipment consisted of the following:
September 30,
2025		December 31,
2024
Plant and Equipment$4,774,817 $3,633,741 
Coal Properties and Surface Lands2,225,310 913,819 
Airshafts592,493 521,334 
Mine Development673,946 366,260 
Advance Mining Royalties337,248 328,927 
Total Property, Plant and Equipment8,603,814 5,764,081 
Less: Accumulated Depreciation, Depletion and Amortization4,213,432 3,842,382 
Total Property, Plant and Equipment - Net$4,390,382 $1,921,699 
As of September 30, 2025 and December 31, 2024, property, plant and equipment included gross assets under finance leases of $50,169 and $40,804, respectively. Accumulated amortization for finance leases was $16,981 and $16,929 at September 30, 2025 and December 31, 2024, respectively. Amortization expense for assets under finance leases approximated $3,358 and $2,110 for the three months ended September 30, 2025 and 2024, respectively, and $9,315 and $7,652 for the nine months ended September 30, 2025 and 2024, respectively, and is included in Depreciation, Depletion and Amortization in the accompanying Consolidated Statements of Income (Loss).