Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
SALES AND OPERATING REVENUES:
Other revenues		$ 1,287	$ 1,340
Total sales and operating revenues		109,672	188,334
EXPENSES:
Operating expenses		85,083	133,521
Depreciation, depletion and amortization		15,443	17,976
Asset retirement obligations accretion		399	451
Exploration costs		70	206
General and administrative		5,944	6,947
Total operating expenses		106,939	159,101
INCOME FROM OPERATIONS		2,733	29,233
Interest expense (1)	[1]	(3,937)	(3,899)
Loss on extinguishment of debt		(853)	0
Equity method investment (loss) income		(249)	69
NET INCOME (LOSS) BEFORE INCOME TAXES		(2,306)	25,403
INCOME TAX EXPENSE (BENEFIT):
Current		0	432
Deferred		(610)	2,920
Total income tax expense (benefit)		(610)	3,352
NET INCOME (LOSS)		$ (1,696)	$ 22,051
NET INCOME (LOSS) PER SHARE:
Basic (in dollars per share)		$ (0.05)	$ 0.67
Diluted (in dollars per share)		$ (0.05)	$ 0.61
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic (in shares)		34,816	32,983
Diluted (in shares)		34,816	36,740
(1) Interest Expense:
Interest on bank debt		$ 2,805	$ 2,255
Other interest		728	432
Amortization:
Amortization of debt issuance costs		404	1,212
Total amortization		404	1,212
Total interest expense	[1]	3,937	3,899
Electric Sales [Member]
SALES AND OPERATING REVENUES:
Revenues		58,755	92,392
Coal Sales [Member]
SALES AND OPERATING REVENUES:
Revenues		$ 49,630	$ 94,602

[1] Interest Expense: