Note 21 - Derivatives (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

	December 31, 2021						December 31, 2020
	Asset Derivatives			Liability Derivatives			Asset Derivatives		Liability Derivatives
Coal Swap Contracts	$	1,086		$	(53,290	)	$	—	$	—
Effect of Counterparty Netting		(1,086	)		1,086			—		—
Net Derivatives as Classified in the Consolidated Balance Sheets	$	—		$	(52,204	)	$	—	$	—