Note 3 - Revenue (Tables)

9 Months Ended

Sep. 30, 2021

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three Months Ended				Nine Months Ended
	September 30, 2021		September 30, 2020		September 30, 2021		September 30, 2020
Domestic Coal Revenue	$	152,311	$	144,171	$	428,688	$	361,598
Export Coal Revenue		106,249		40,204		375,239		180,542
Terminal Revenue		14,108		17,008		49,700		49,407
Freight Revenue		19,348		12,909		72,371		19,141
Total Revenue from Contracts with Customers	$	292,016	$	214,292	$	925,998	$	610,688