Note 2 - Revenue from Contracts with Customers: (Tables)

6 Months Ended

Jun. 30, 2022

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three Months Ended June 30, 2022
	Domestic		Export		Total
Power Generation	$	203,846	$	29,594	$	233,440
Industrial		8,849		156,110		164,959
Metallurgical		—		134,293		134,293
Total Coal Revenue		212,695		319,997		532,692
Terminal Revenue						21,779
Freight Revenue						50,411
Total Revenue from Contracts with Customers					$	604,882

	Three Months Ended June 30, 2021
	Domestic		Export		Total
Power Generation	$	112,410	$	27,105	$	139,515
Industrial		3,401		92,663		96,064
Metallurgical		1,350		22,903		24,253
Total Coal Revenue		117,161		142,671		259,832
Terminal Revenue						17,380
Freight Revenue						26,010
Total Revenue from Contracts with Customers					$	303,222

	Six Months Ended June 30, 2022
	Domestic		Export		Total
Power Generation	$	427,346	$	150,035	$	577,381
Industrial		10,794		253,658		264,452
Metallurgical		—		167,227		167,227
Total Coal Revenue		438,140		570,920		1,009,060
Terminal Revenue						43,176
Freight Revenue						88,800
Total Revenue from Contracts with Customers					$	1,141,036

	Six Months Ended June 30, 2021
	Domestic		Export		Total
Power Generation	$	267,720	$	60,236	$	327,956
Industrial		6,237		173,237		179,474
Metallurgical		2,420		35,517		37,937
Total Coal Revenue		276,377		268,990		545,367
Terminal Revenue						35,592
Freight Revenue						53,023
Total Revenue from Contracts with Customers					$	633,982