CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenues
Revenues	$ 66,777	$ 50,909
Cost of revenues
Labor and other operating expenses	37,029	31,259
Depreciation, depletion and amortization	5,756	5,183
Total cost of revenues	42,785	36,442
Gross profit	23,992	14,467
Selling, general and administrative expenses	4,152	3,635
Operating profit	19,840	10,832
Other expense (income)
Interest expense	64	63
Interest and other income, net	(1,571)	(60)
Total other expense (income)	(1,507)	3
Income before income tax expense	21,347	10,829
Income tax expense	4,243	2,161
Net income	$ 17,104	$ 8,668
Net income per share of common stock
Basic (in dollars per share)	$ 3.01	$ 1.53
Diluted (in dollars per share)	$ 3.00	$ 1.53