Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
SALES AND OPERATING REVENUES:
Other revenues	$ 1,267	$ 1,603	$ 2,554	$ 2,943
Total sales and operating revenues	90,914	161,194	200,586	349,528
EXPENSES:
Fuel	10,439	32,641	18,498	88,614
Other operating and maintenance costs	35,912	41,908	73,394	74,428
Utilities	3,396	4,343	7,770	8,840
Labor	26,555	36,528	61,723	77,059
Depreciation, depletion and amortization	13,649	17,169	29,092	35,145
Asset retirement obligations accretion	399	461	798	912
Exploration costs	47	305	117	511
General and administrative	7,803	5,595	13,747	12,542
Total operating expenses	98,200	138,950	205,139	298,051
INCOME (LOSS) FROM OPERATIONS	(7,286)	22,244	(4,553)	51,477
Interest expense (1)	(3,735)	(3,541)	(7,672)	(7,440)
Loss on extinguishment of debt	(1,937)	0	(2,790)	0
Equity method investment (loss)	(257)	(217)	(506)	(148)
NET INCOME (LOSS) BEFORE INCOME TAXES	(13,215)	18,486	(15,521)	43,889
INCOME TAX EXPENSE (BENEFIT):
Current	0	61	0	493
Deferred	(3,011)	1,510	(3,621)	4,430
Total income tax expense (benefit)	(3,011)	1,571	(3,621)	4,923
NET INCOME (LOSS)	$ (10,204)	$ 16,915	$ (11,900)	$ 38,966
NET INCOME (LOSS) PER SHARE:
Basic (in dollars per share)	$ (0.27)	$ 0.51	$ (0.32)	$ 1.18
Diluted (in dollars per share)	$ (0.27)	$ 0.47	$ (0.32)	$ 1.08
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic (in shares)	37,879	33,137	37,026	33,061
Diluted (in shares)	37,879	36,708	37,026	36,696
(1) Interest Expense:
Interest on bank debt	$ 2,779	$ 2,055	$ 5,584	$ 4,310
Other interest	547	462	1,275	894
Amortization:
Amortization of debt issuance costs	409	1,024	813	2,236
Total amortization	409	1,024	813	2,236
Total interest expense	3,735	3,541	7,672	7,440
Electric Sales [Member]
SALES AND OPERATING REVENUES:
Revenues	56,846	71,017	115,601	163,409
Coal Sales [Member]
SALES AND OPERATING REVENUES:
Revenues	$ 32,801	$ 88,574	$ 82,431	$ 183,176