Note 10 - Property, Plant and Equipment (Tables)

6 Months Ended

Jun. 30, 2020

Notes Tables

Property, Plant and Equipment [Table Text Block]

	June 30,		December 31,
	2020		2019
Plant and Equipment	$	3,072,238	$	3,028,514
Coal Properties and Surface Lands		873,809		872,909
Airshafts		447,417		437,003
Mine Development		343,261		342,706
Advance Mining Royalties		327,217		327,048
Total Property, Plant and Equipment		5,063,942		5,008,180
Less: Accumulated Depreciation, Depletion and Amortization		2,996,331		2,916,015
Total Property, Plant and Equipment, Net	$	2,067,611	$	2,092,165