Condensed Consolidated Statements Of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 9,869,000	$ (52,800,000)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Loss from discontinued operations	19,000	63,000
Depreciation, depletion and amortization	4,148,000	3,103,000
Bargain purchase gain	(7,651,000)
Impairment of proved crude oil and natural gas properties	0	30,625,000
Other amortization		60,000
Deferred taxes	1,809,000	35,638,000
Unrealized foreign exchange gain	(400,000)	(22,000)
Stock-based compensation	1,559,000	(2,569,000)
Cash settlements paid on exercised stock appreciation rights	(852,000)	0
Derivative instruments (gain) loss, net	5,954,000	(7,339,000)
Cash settlements received (paid) on matured derivative contracts, net	(1,710,000)	718,000
Bad debt expense and other	101,000	810,000
Other operating loss, net	360,000	31,000
Operational expenses associated with equipment and other	247,000	578,000
Change in operating assets and liabilities:
Trade receivables	(12,647,000)	14,335,000
Accounts with joint venture owners	275,000	13,812,000
Other receivables	(53,000)	(755,000)
Crude oil inventory	5,795,000	(2,793,000)
Prepayments and other	(3,240,000)	(993,000)
Value added tax and other receivables	(149,000)	(370,000)
Accounts payable	(6,627,000)	(1,130,000)
Foreign income taxes receivable/payable	5,524,000	(1,284,000)
Accrued liabilities and other	(576,000)	(2,073,000)
Net cash provided by continuing operating activities	1,755,000	27,645,000
Net cash used in discontinued operating activities	(13,000)	(18,000)
Net cash provided by operating activities	1,742,000	27,627,000
CASH FLOWS FROM INVESTING ACTIVITIES:
Property and equipment expenditures	(1,198,000)	(11,980,000)
Acquisition of crude oil and natural gas properties	(17,858,000)
Net cash used in continuing investing activities	(19,056,000)	(11,980,000)
Net cash used in discontinued investing activities
Net cash used in investing activities	(19,056,000)	(11,980,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from the issuances of common stock	347,000
Treasury shares	(403,000)	(652,000)
Net cash used in continuing financing activities	(56,000)	(652,000)
Net cash used in discontinued financing activities
Net cash used in financing activities	(56,000)	(652,000)
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(17,370,000)	14,995,000
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT BEGINNING OF PERIOD	61,317,000	59,124,000
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT END OF PERIOD	43,947,000	74,119,000
Supplemental disclosure of non-cash investing and financing activities:
Property and equipment additions incurred but not paid at end of period	$ 3,137,000	10,991,000
Asset retirement obligations		$ 359,000