Note 15 - Derivatives (Tables)

9 Months Ended

Sep. 30, 2021

Notes Tables

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

	September 30, 2021					December 31, 2020
	Asset Derivatives		Liability Derivatives			Asset Derivatives		Liability Derivatives
Coal Contracts Related to Forecasted Sales	$	—	$	(167,743	)	$	—	$	—
Effect of Counterparty Netting		—		—			—		—
Net Derivatives as Classified in the Consolidated Balance Sheets	$	—	$	(167,743	)	$	—	$	—