Note 7 - Supplemental Information Relating to Oil and Gas Producing Activities (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2021

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,
	2021		2020
Proved oil and gas properties	$	136,173,678	$	142,912,812
Pipeline and support equipment		527,916		719,988
Gross capitalized costs		136,701,594		143,632,800
Accumulated depreciation, depletion, amortization and write down		130,777,683		137,211,641
Net capitalized costs	$	5,923,911	$	6,421,159

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,
	2021			2020
Crude oil and natural gas sales	$	9,067,189		$	3,413,680
Production costs		(2,294,111	)		(1,955,265	)
Depreciation, depletion and amortization		(369,120	)		(970,115	)
Accretion expense		(212,410	)		(243,468	)
Results of operations before income tax benefit		6,191,548			244,832
Income tax benefit		110,000			70,000
Results of operations for oil and gas producing activities (excluding corporate overhead and financing costs)	$	6,301,548		$	314,832

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, 2020		329,000			13,035,000
Production		(31,000	)		(1,185,000	)
Revision of previous estimates		(63,000	)		(6,100,000	)
Balance, December 31, 2020		235,000			5,750,000
Production		(36,000	)		(2,053,000	)
Revision of previous estimates		137,000			12,448,000
Balance, December 31, 2021		336,000			16,145,000

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,
	2021			2020
	(Thousands of Dollars)
Future cash inflows from sales of oil and gas	$	68,661		$	16,918
Future production and development costs		(37,790	)		(11,227	)
Future asset retirement obligations, net of salvage		(13,227	)		(13,879	)
Future income tax expense		(363	)		(42	)
Future net cash flows		17,281			(8,230	)
Effect of discounting future net cash flows at 10% per annum		(10,505	)		(334	)
Standardized measure of discounted future net cash flows	$	6,776		$	(8,564	)

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,
	2021			2020
	(Thousands of Dollars)
Balance, beginning of year	$	(8,564	)	$	(2,502	)
Revision of quantity estimates		12,040			(1,337	)
Sales of crude oil and natural gas, net of production costs		(6,773	)		(1,458	)
Net change in income taxes		(194	)		79
Net changes in prices and production costs		5,394			(7,748	)
Accretion of discount		(856	)		(250	)
Other		5,729			4,652
Balance, end of year	$	6,776		$	(8,564	)