Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Cash Flows from Operating Activities:
Net Income (Loss)	$ (64,255)	$ 28,380
Adjustments to reconcile net income to net cash provided by operating activities -
Depreciation, depletion, and amortization	21,154	13,393
Accretion of asset retirement obligation	99	75	$ 306
Deferred income taxes	(2,902)	0
Stock-based compensation expenses	1,047	1,070
Loss (gain) on derivatives	140,242	18,259
Cash settlement (paid) received on derivatives	(24,554)	(3,063)
Settlements of asset retirement obligations	(38)	(104)
Other Noncash Income (Expense)	1,138	344
(Increase) decrease in accounts receivable and other current assets	2,794	(878)
Increase (decrease) in accounts payable and accrued liabilities	(10,144)	10,301
Increase (Decrease) in Income Taxes Payable	149	0
Increase (decrease) in accrued interest	165	69
Net Cash Provided by (Used in) Operating Activities	64,895	67,846
Cash Flows from Investing Activities:
Additions to property and equipment	(35,228)	(35,852)
Acquisition of oil and gas properties	436	(205)
Net Cash Provided by (Used in) Investing Activities	(34,792)	(36,057)
Cash Flows from Financing Activities:
Proceeds from bank borrowings	122,000	57,000
Payments of bank borrowings	(149,000)	(87,000)
Purchase of treasury shares	(2,462)	(488)
Payments of Debt Issuance Costs	(117)	0
Net Cash Provided by (Used in) Financing Activities	(29,579)	(30,488)
Net increase (decrease) in Cash, Cash Equivalents and Restricted Cash	524	1,301
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,645	3,419	$ 1,121	$ 2,118
Supplemental Disclosures of Cash Flows Information:
Cash paid during period for interest, net of amounts capitalized	5,816	6,424
Changes in capital accounts payable and capital accruals	5,037	(3,588)
Non-cash equity consideration for acquisitions	$ 1,134	$ 0