Note 8 - Revenue - Domestic Revenues an Export Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
REVENUES
Revenues	$ 172,676	$ 166,360
Domestic Coal Revenues
REVENUES
Revenues	54,173	40,027
Export Revenues
REVENUES
Revenues	$ 118,503	$ 126,333