Note 7 - Revenues (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018		2017
Coal Sales
Domestic revenues	$	35,735,697	$	7,385,983	$	95,810,176	$	15,162,938
Export revenues		26,430,041		7,018,996		87,576,767		19,616,141
Total coal sales		62,165,738		14,404,979		183,386,943		34,779,079
Coal Processing		-		-		-		2,237,674
Total revenues	$	62,165,738	$	14,404,979	$	183,386,943	$	37,016,753