Concentration of Credit Risk and Major Customers (Tables)

12 Months Ended

Dec. 31, 2022

Risks and Uncertainties [Abstract]

Schedule of Concentration of Credit Risk

Concentration of credit risk is summarized below:

	December 31,
	2022		2021
Electric coal utilities	$	82,608	$	41,582
Coal exporters and industrial customers	51,548		53,949
Steel and coke producers	24,230		11,560
Other	1,472		1,605
Total Trade Receivables	159,858		108,696
Less: Allowance for credit losses	(1,731)		(4,597)
Total Trade Receivables, net	$	158,127	$	104,099