Note 2 - Revenue (Tables)

6 Months Ended

Jun. 30, 2020

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three Months Ended				Six Months Ended
	June 30, 2020		June 30, 2019		June 30, 2020		June 30, 2019
Coal Revenue	$	102,313	$	350,620	$	357,765	$	683,123
Terminal Revenue		15,898		16,708		32,399		34,526
Freight Revenue		3,085		3,854		6,232		10,516
Total Revenue from Contracts with Customers	$	121,296	$	371,182	$	396,396	$	728,165