CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenues
Revenues	$ 74,878	$ 66,457	$ 215,638	$ 177,858
Cost of revenues
Labor and other operating expenses	40,827	38,221	118,796	108,018
Depreciation, depletion and amortization	5,896	5,646	17,564	16,302
Total cost of revenues	46,723	43,867	136,360	124,320
Gross profit	28,155	22,590	79,278	53,538
Selling, general and administrative expenses	4,355	3,543	12,826	11,026
Operating profit	23,800	19,047	66,452	42,512
Other expense (income)
Other (income) expense, net	(2,197)	(514)	(5,529)	(625)
Income before income tax expense	25,997	19,561	71,981	43,137
Income tax expense	5,264	3,835	14,432	8,505
Net income	$ 20,733	$ 15,726	$ 57,549	$ 34,632
Net income per share of common stock
Basic (in dollars per share)	$ 3.64	$ 2.77	$ 10.11	$ 6.11
Diluted (in dollars per share)	$ 3.63	$ 2.77	$ 10.09	$ 6.10