Supplemental Oil And Gas Information (Tables)

12 Months Ended

Dec. 31, 2018

Supplemental Oil And Gas Information [Abstract]

Schedule Of Capitalized Costs Related To Oil And Gas Producing Activities

	Years Ended December 31,
	2018		2017
Proved oil and gas properties	$	6,503	$	5,704
Unproved properties		23		—
Total proved and unproved oil and gas properties	$	6,526	$	5,704
Less accumulated depreciation, depletion and amortization		(1,722)		(984)
Net oil and gas properties	$	4,804	$	4,720

Schedule Of Oil And Gas Property Acquisition, Exploration And Development

	Years Ended December 31,
	2018		2017
Property acquisitions proved	$	164	$	—
Property acquisitions unproved		23		93
Exploration cost		590		69
Development cost		243		—
Total	$	1,020	$	162

Schedule Of Results Of Operations From Oil And Gas Producing Activities

	Years Ended December 31,
	2018		2017
Revenues	$	5,871	$	4,683
Production costs and taxes		(3,591)		(3,444)
Depreciation, depletion and amortization		(722)		(796)
Income (loss) from oil and gas producing activities	$	1,558	$	443

Schedule Of Net Proved Oil And Gas Reserves And The Changes In Net Proved Oil And Gas Reserves

	Oil (MBbl)	Gas (MMcf)	MBOE
Proved reserves at December 31, 2016	730	—	730
Revisions of previous estimates	195	—	195
Improved recovery	—	—	—
Purchase of reserves in place	—	—	—
Extensions and discoveries	47	—	47
Production	(102)	—	(102)
Sales of reserves in place	—	—	—
Proved reserves at December 31, 2017	870	—	870
Revisions of previous estimates	223	—	223
Improved recovery	—	—	—
Purchase of reserves in place	13	—	13
Extensions and discoveries	86	—	86
Production	(98)	—	(98)
Sales of reserves in place	—	—	—
Proved reserves at December 31, 2018	1,094	—	1,094
Proved developed reserves at:
December 31, 2016	730	—	730
December 31, 2017	832	—	832
December 31, 2018	976	—	976
Proved undeveloped reserves at:
December 31, 2016	—	—	—
December 31, 2017	38	—	38
December 31, 2018	118	—	118

Schedule Of Reserve Value By Category And The Respective Present Values, Before Income Taxes, Discounted At 10% As A Percentage Of Total Proved Reserves

	Year Ended 12/31/2018						Year Ended 12/31/2017						Year Ended 12/31/2016
	Oil		Gas		Total		Oil		Gas		Total		Oil		Gas		Total
Total proved reserves    year-end reserve    report	$	13,976		—	$	13,976	$	8,170		—	$	8,170	$	5,815		—	$	5,815
Proved developed    producing reserves    (PDP)	$	12,534		—	$	12,534	$	7,065		—	$	7,065	$	5,397		—	$	5,397
% of PDP reserves to    total proved reserves		90%		—		90%		87%		—		87%		93%		—		93%
Proved developed non-    producing reserves	$	739		—	$	739	$	1,082		—	$	1,082	$	418		—	$	418
% of PDNP reserves to    total proved reserves		5%		—		5%		13%		—		13%		7%		—		7%
Proved undeveloped    reserves (PUD)	$	703		—	$	703	$	23		—	$	23	$	—		—	$	—
% of PUD reserves to    total proved reserves		5%		—		5%		—		—		—		—		—		—

Schedule Of Standardized Measure Of Discounted Futures Net Cash Flows From Proved Oil And Gas Reserves

	Years Ended December 31,
	2018		2017		2016
Future cash inflows	$	65,871	$	39,889	$	27,253
Future production costs and taxes		(35,877)		(23,343)		(16,270)
Future development costs		(2,833)		(1,586)		(553)
Future income tax expenses		—		—		—
Future net cash flows		27,161		14,960		10,430
Discount at 10% for timing of cash flows		(13,185)		(6,790)		(4,615)
Standardized measure of discounted future net cash flows	$	13,976	$	8,170	$	5,815

Schedule Of Changes In The Standardized Measure Of Discounted Future Net Cash Flows From Proved Oil And Gas Reserves

	Years Ended December 31,
	2018		2017		2016
Balance, beginning of year	$	8,170	$	5,815	$	8,287
Sales, net of production costs and taxes		(2,611)		(1,239)		(2,037)
Discoveries and extensions, net of costs		798		123		35
Purchase of reserves in place		143		—		—
Sale of reserves in place		—		—		(10)
Net changes in prices and production costs		4,304		1,780		(863)
Revisions of quantity estimates		2,180		1,611		(412)
Previously estimated development cost incurred during the year		210		—		—
Changes in future development costs		78		(228)		196
Changes in timing and other		(4)		(164)		(20)
Accretion of discount		708		472		639
Net change in income taxes		—		—		—
Balance, end of year	$	13,976	$	8,170	$	5,815