Note 13 - Derivatives (Tables)

6 Months Ended

Jun. 30, 2022

Notes Tables

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

	June 30, 2022						December 31, 2021
	Asset Derivatives			Liability Derivatives			Asset Derivatives			Liability Derivatives
Coal Swap Contracts	$	75,822		$	(250,750	)	$	1,086		$	(53,290	)
Effect of Counterparty Netting		(75,822	)		75,822			(1,086	)		1,086
Net Derivatives as Classified in the Consolidated Balance Sheets	$	—		$	(174,928	)	$	—		$	(52,204	)