Note 9 - Supplemental Information Relating to Oil and Gas Producing Activities (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Capitalized Costs Relating to Oil and Gas Producing Activities Disclosure [Table Text Block]

CAPITALIZED COSTS RELATING TO OIL AND GAS
PRODUCING ACTIVITIES
	Years ended December 31,
	2016		2015
Proved oil and gas properties	$	181,447,571	$	181,293,110
Pipeline and support equipment		682,135		631,757
Gross capitalized costs		182,129,706		181,924,867
Accumulated depreciation, depletion, amortization and write down		172,885,338		168,088,105
Net capitalized costs	$	9,244,368	$	13,836,762

Cost Incurred in Oil and Gas Property Acquisition, Exploration, and Development Activities Disclosure [Table Text Block]

COSTS INCURRED IN OIL AND GAS PRODUCING ACTIVITIES
	Years ended December 31,
	2016		2015
Property acquisition costs	$	20,363	$	29,037
Development costs		136,274		72,047

Results of Operations for Oil and Gas Producing Activities Disclosure [Table Text Block]

RESULTS OF OPERATIONS FOR OIL AND
GAS PRODUCING ACTIVITIES
	Years ended December 31,
	2016			2015
Crude oil and natural gas sales	$	3,439,081		$	5,728,206
Production costs		(2,164,682	)		(2,734,789	)
Depreciation, depletion and amortization		(4,753,321	)		(12,363,647	)
Accretion expense		(393,535	)		(583,792	)
Write down/impairment and abandonment of crude oil and natural gas properties		(88,329	)		(9,575,275	)
Results of operations before income tax expense (benefit)		(3,960,786	)		(19,529,297	)
Income tax expense (benefit)		(20,000	)		11,000
Results of operations for oil and gas producing activities (excluding corporate overhead and financing costs)	$	(3,940,786	)	$	(19,540,297	)

Schedule of Proved Developed and Undeveloped Oil and Gas Reserve Quantities [Table Text Block]

ESTIMATED QUANTITIES OF PROVED OIL AND GAS RESERVES
	Oil			Gas
	(BBLS)			(MCF)
Balance, January 1, 2015		511,000			23,724,000
Extensions, discoveries and other additions		2,000			5,000
Production		(44,000	)		(1,616,000	)
Revision of previous estimates		(192,000	)		(14,122,000	)
Balance, December 31, 2015		277,000			7,991,000
Extensions, discoveries and other additions		5,000			13,000
Production		(34,000	)		(1,157,000	)
Revision of previous estimates		(4,000	)		(1,567,000	)
Balance, December 31, 2016		244,000			5,280,000
PROVED DEVELOPED RESERVES:
December 31, 2014		511,000			23,724,000
December 31, 2015		277,000			7,991,000
December 31, 2016		244,000			5,280,000

Standardized Measure of Discounted Future Cash Flows Relating to Proved Reserves Disclosure [Table Text Block]

STANDARDIZED MEASURE OF DISCOUNTED FUTURE
NET CASH FLOWS
	December 31,
	2016			2015
	(Thousands of Dollars)
Future cash inflows from sales of oil and gas	$	17,014		$	23,821
Future production and development costs		(10,853	)		(15,446	)
Future asset retirement obligations, net of salvage		(16,451	)		(16,443	)
Future income tax expense		(95	)		(144	)
Future net cash flows		(10,385	)		(8,212	)
Effect of discounting future net cash flows at 10% per annum		461			1
Standardized measure of discounted future net cash flows	$	(9,924	)	$	(8,211	)

Schedule of Changes in Standardized Measure of Discounted Future Net Cash Flows [Table Text Block]

CHANGES IN THE STANDARDIZED MEASURE OF
DISCOUNTED FUTURE NET CASH FLOWS
	Years Ended December 31,
	2016			2015
	(Thousands of Dollars)
Balance, beginning of year	$	(8,211	)	$	28,157
Extensions, discoveries and other additions		85			30
Revision of quantity estimates		(184	)		(2,562	)
Sales of crude oil and natural gas, net of production costs		(1,274	)		(2,993	)
Net change in income taxes		32			573
Net changes in prices and production costs		(1,080	)		(31,254	)
Accretion of discount		(821	)		2,816
Other		1,529			(2,978	)
Balance, end of year	$	(9,924	)	$	(8,211	)