CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 23,758	$ 34,724
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation, depletion, and amortization	5,072	3,975
(Gain) loss on derivative contracts	(1,447)	1,064
Realized settlement gains (losses) on derivative contracts	(5,876)	1,085
Stock-based compensation	396	356
Other	38	38
Changes in operating assets and liabilities	6,154	(6,879)
Net cash provided by operating activities	39,847	32,193
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures for property, plant and equipment	(9,392)	(5,629)
Purchase of other property and equipment	(16)	(49)
Proceeds from sale of assets	0	59
Net cash used in investing activities	(9,408)	(5,619)
CASH FLOWS FROM FINANCING ACTIVITIES
Reduction of financing lease liability	(132)	(113)
Proceeds from exercise of stock options	0	28
Tax withholdings paid in exchange for shares withheld on employee vested stock awards	(211)	(235)
Net cash used in financing activities	(343)	(320)
NET INCREASE IN CASH, CASH EQUIVALENTS and RESTRICTED CASH	30,096	26,254
CASH, CASH EQUIVALENTS and RESTRICTED CASH, beginning of year	257,468	139,524
CASH, CASH EQUIVALENTS and RESTRICTED CASH, end of period	287,564	165,778
Supplemental Disclosure of Cash Flow Information
Cash paid for interest, net of amounts capitalized	(32)
Cash paid for interest, net of amounts capitalized		(145)
Supplemental Disclosure of Noncash Investing and Financing Activities
Capital expenditures for property, plant and equipment in accounts payables and accrued expenses	8,904	680
Inventory material transfers to oil and natural gas properties	75	0
Asset retirement obligation capitalized	$ 12	$ 0