Note 3 - Revenue (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Disaggregation of Revenue [Table Text Block]

	For the Year Ended		For the Year Ended		For the Year Ended
	December 31, 2021		December 31, 2020		December 31, 2019
Domestic Coal Revenue	$	590,941	$	506,554	$	822,389
Export Coal Revenue		501,081		266,108		466,140
Terminal Revenue		65,193		66,810		67,363
Freight Revenue		103,819		39,990		19,667
Total Revenue from Contracts with Customers	$	1,261,034	$	879,462	$	1,375,559