Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020
SALES AND OPERATING REVENUES:
Coal sales		$ 243,903	$ 242,084
Other revenues		3,763	2,157
Total revenue		247,666	244,241
EXPENSES:
Operating expenses		198,840	185,957
Depreciation, depletion and amortization		39,973	39,644
Asset impairment		1,588	1,799
Asset retirement obligations accretion		1,504	1,381
Asset retirement obligations change in estimate		(3,510)	0
Exploration costs		482	768
General and administrative		14,833	11,594
Total operating expenses		253,710	241,143
INCOME (LOSS) FROM OPERATIONS		(6,044)	3,098
Interest expense	[1]	(8,048)	(13,030)
Gain on extinguishment of debt		10,000	0
Equity method investment income		364	1,054
LOSS BEFORE INCOME TAXES		(3,728)	(8,878)
Current		0	(598)
Deferred		26	(2,060)
Total income tax expense (benefit)		26	(2,658)
NET LOSS		$ (3,754)	$ (6,220)
NET LOSS PER SHARE:
Basic and diluted (in dollars per share)		$ (0.12)	$ (0.20)
WEIGHTED AVERAGE SHARES OUTSTANDING:
Basic and diluted (in shares)		30,614	30,446
(1) Bank interest		$ 8,510	$ 10,653
Non-cash interest:
Change in interest rate swap valuation		(3,026)	68
Amortization of debt issuance costs		2,564	2,296
Other		0	13
Total non-cash interest		(462)	2,377
Total interest	[1]	$ 8,048	$ 13,030

[1] Interest Expense