CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues
Revenues	$ 38,440	$ 37,799
Cost of revenues
Labor and other operating expenses	23,962	25,038
Depreciation, depletion and amortization	4,601	4,068
Total cost of revenues	28,563	29,106
Gross profit	9,877	8,693
Selling, general and administrative expenses	3,219	2,673
Operating profit	6,658	6,020
Other expense (income)
Interest expense	62	62
Interest and other income, net	(247)	(492)
Total other expense (income)	(185)	(430)
Income before income tax expense	6,843	6,450
Income tax expense	1,299	1,322
Net income	$ 5,544	$ 5,128
Net income per share of common stock
Basic (in dollars per share)	$ 0.99	$ 0.91
Diluted (in dollars per share)	$ 0.98	$ 0.91