Note 11 - Property, Plant and Equipment (Tables)

9 Months Ended

Sep. 30, 2021

Notes Tables

Property, Plant and Equipment [Table Text Block]

	September 30,		December 31,
	2021		2020
Plant and Equipment	$	3,189,279	$	3,134,149
Coal Properties and Surface Lands		876,762		874,567
Airshafts		470,075		452,976
Mine Development		356,432		354,691
Advance Mining Royalties		326,881		327,313
Total Property, Plant and Equipment		5,219,429		5,143,696
Less: Accumulated Depreciation, Depletion and Amortization		3,220,472		3,094,634
Total Property, Plant and Equipment, Net	$	1,998,957	$	2,049,062