Supplementary Financial Information for Oil and Gas Producing Activities (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2018

Supplementary Financial Information for Oil and Gas Producing Activities (Unaudited)

Schedule of results of operations from oil and gas producing activities (in thousands)

	2018		2017		2016
Results of Operations
Revenues	$	2,513	$	2,232	$	2,092
Production and operating costs		859		858		1,164
Depreciation and depletion		650		646		868
Results of operations before income taxes		1,004		728		60
Income tax expense (benefit)		155		145		(93)
Results of operations (excluding corporate overhead and interest costs)	$	849	$	583	$	153
Costs Incurred
Development costs incurred	$	—	$	2	$	15
Exploration costs		—		—		—
Capitalized asset retirement costs		—		—		—
Property acquisition costs		—		—		—
Capitalized Costs
Natural gas properties - proved	$	18,414	$	18,414	$	18,412
Less: accumulated depreciation and depletion		12,198		11,546		10,900
Net capitalized costs for natural gas properties	$	6,216	$	6,868	$	7,512

Summary of changes in proved reserves

		Natural Gas		Natural Gas		Natural Gas
	Natural	Liquids	Natural Gas	Liquids	Natural Gas	Liquids
	Gas (BCF)	(MMBBLS)	(BCF)	(MMBBLS)	(BCF)	(MMBBLS)
	2018	2018	2017	2017	2016	2016
Proved reserves - beginning of year	4.6	0.7	3.9	0.5	5.3	0.7
Revisions of previous estimates	(0.3)	(0.0)	1.3	0.3	(0.9)	(0.1)
Extensions and discoveries	—	—	—	—	—	—
Production	(0.4)	(0.1)	(0.6)	(0.1)	(0.5)	(0.1)
Proved reserves - end of year	3.9	0.6	4.6	0.7	3.9	0.5
Proved developed reserves - end of year	3.9	0.6	4.6	0.7	3.9	0.5

Schedule of standardized measure of discounted future net cash flows (in thousands)

	2018		2017		2016
Future estimated gross revenues	$	25,759	$	26,786	$	17,908
Future estimated production and development costs		(10,095)		(11,170)		(8,402)
Future estimated net revenues		15,664		15,616		9,506
Future estimated income tax expense		(2,479)		(2,592)		(2,458)
Future estimated net cash flows		13,185		13,024		7,048
10% annual discount for estimated timing of cash flows		(6,695)		(6,448)		(2,851)
Standardized measure of discounted future estimated net cash flows	$	6,490	$	6,576	$	4,197

Schedule of changes in standardized measure of discounted future net cash flows (in thousands)

	2018		2017		2016
Standardized measure - beginning of year	$	6,576	$	4,197	$	5,286
Net change in sales prices and production costs		1,675		1,146		(1,403)
Sales of natural gas produced, net of production costs		(1,654)		(1,372)		(928)
Net change due to changes in quantity estimates		(590)		1,594		(1,732)
Previously estimated development costs incurred		—		—		—
Net change in income taxes		414		(155)		414
Accretion of discount		555		456		571
Timing of production of reserves and other		(486)		710		1,989
Standardized measure - end of year	$	6,490	$	6,576	$	4,197