Note 25 - Related Party Transactions (Details Textual)		12 Months Ended
	Dec. 30, 2020 USD ($) shares	Dec. 31, 2021 USD ($) shares		Dec. 31, 2020 shares	[1]	Dec. 31, 2019 shares	[1]
Stock Issued During Period, Shares, Acquisitions (in shares)	7,967,690	0	[1]	7,967,690		0
CONSOL Coal Resources L P [Member]
Common Unit, Issued (in shares)	10,912,138
Common Stock, Fixed Exchange Ratio	0.73
Conversion of Stock, Amount Converted | $	$ 51,710
CONSOL Coal Resources L P [Member] | Affiliated Company Credit Agreement [Member] | Affiliated Entity [Member]
Common Unit, Issued (in shares)		37,322,410
Repayments of Long-term Debt, Total | $		$ 176,535

[1] See Note 2 - Major Transactions for additional information.