L. SUPPLEMENTARY FINANCIAL INFORMATION ON OIL AND NATURAL GAS EXPLORATION (Tables)

12 Months Ended

Dec. 31, 2017

Extractive Industries [Abstract]

Schedule of Proved Developed and Undeveloped Oil and Gas Reserve Quantities

	2017
	Gas (MMCF)			Oil (MBBLS)
Proved developed and undeveloped reserves - January 1,2017		3,219			149
Purchase of oil and natural gas properties in place		0			0
Discoveries and exclusions		0			0
Revisions		(2,211	)		(75	)
Sales of oil and gas properties in place		0			0
Production		(178	)		(5	)
Proved developed and undeveloped reserves - December 31,2017		830			69
Probable reserves		1,025
Possible reserves		342
Total reserves - December 31, 2017		2,197			69
Proved developed at beginning of year		1,051			81
Proved developed reserves at end of year		830			69

	2016
	Gas (MMCF)			Oil (MBBLS)
Proved developed and undeveloped reserves -
January 1, 2016		2,604			58
Purchase of oil and natural gas properties in place		0			0
Discoveries and exclusions		0			0
Revisions		746			95
Sales of oil and gas properties in place		0			0
Production		(155	)		(4	)
Total reserves - December 31, 2017		3,195			149
Proved developed at  beginning of year		504			59
Proved developed reserves at end of year		1,051			81

Cost Incurred in Oil and Gas Property Acquisition, Exploration, and Development Activities Disclosure

	2017			2016
Oil and gas sales	$	791		$	764
Operating expenses		(707	)		(687	)
Depreciation, depletion and amortization		(320	)		(494	)
Impairment of oil & gas properties		(2,626	)		–
Results of operations	$	(2,862	)	$	(417	)

Schedule of Changes in Standardized Measure of Discounted Future Net Cash Flows

	2017			2016
Future oil and gas cash inflows	$	10,653		$	19,368
Future oil & gas operating expenses		(3,425	)		(4,605	)
Future development costs		(1,480	)		(2,982	)
Future tax expense		(724	)		(1,308	)
Future net cash flows	$	5,024		$	10,473
10% discount to reflect timing of cash flows		(2,303	)		(4,150	)
	$	2,721		$	6,323