Note 9 - Property, Plant and Equipment (Tables)

6 Months Ended

Jun. 30, 2022

Notes Tables

Property, Plant and Equipment [Table Text Block]

	June 30,		December 31,
	2022		2021
Plant and Equipment	$	3,279,307	$	3,209,232
Coal Properties and Surface Lands		884,597		881,551
Airshafts		480,620		473,866
Mine Development		360,225		357,479
Advance Mining Royalties		328,984		328,677
Total Property, Plant and Equipment		5,333,733		5,250,805
Less: Accumulated Depreciation, Depletion and Amortization		3,373,966		3,272,255
Total Property, Plant and Equipment, Net	$	1,959,767	$	1,978,550