K. QUARTERLY DATA (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Revenue	$ 119	$ 127	$ 164	$ 180	$ 138	$ 167	$ 173	$ 204	$ 159	$ 194	$ 243	$ 195	$ 590	$ 682	$ 791
Operating (expense)	(100)	(176)	(231)	(179)	(144)	(186)	(239)	(275)	(261)	(254)	(256)	(256)	(3,383)	(1,197)	(4,061)
Corporate general and administrative expense	(98)	(92)	(134)	(88)	(71)	(99)	(108)	(75)	(91)	(95)	(122)	(100)	(412)	(353)	(408)
Impairment of natural gas and oil properties		2,285							2,626				(2,285)		(2,626)
Other income (expense) net	62	106	60	213	22	(3)		12	(30)	65	11	(11)	441	31	29
Net income (loss) from continuing operations									(2,849)	(90)	(124)	(172)	(2,551)	(484)	(3,241)
Net income (loss) from discontinued operations									(2)	(11)	(11)	13			(5)
Income (loss) allocable to common shareholders	$ (17)	$ (2,320)	$ (141)	$ 126	$ (55)	$ (121)	$ (174)	$ (134)	$ (2,851)	$ (101)	$ (135)	$ (159)	$ (2,352)	$ (484)	$ (3,246)
Income (loss) per common share - basic	$ 0.00	$ (0.45)	$ (0.03)	$ 0.02	$ 0.00	$ (0.06)	$ (0.08)	$ (0.07)	$ (1.39)	$ (0.05)	$ (0.07)	$ (0.08)