J. OPERATING SEGMENTS (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	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, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue	$ 138	$ 167	$ 173	$ 204	$ 159	$ 194	$ 243	$ 195	$ 185	$ 190	$ 170	$ 219	$ 682	$ 791	$ 764
Impairment of natural gas and oil properties					2,626									2,626
Total operating expenses	144	$ 186	$ 239	$ 275	261	254	256	256	327	295	233	396	1,197	4,061	1,533
Interest income													37	25	23
Interest expense													(18)	(24)	(38)
Gain on prepayment of debt									888						888
Gain on sale of land									50						50
Recovery of bad debt
Other income (expense) net													12	28	(110)
Segment operating income (loss)					(2,849)	$ (90)	$ (124)	$ (172)	738	$ (170)	$ (171)	$ (353)	(484)	(3,241)	44
Assets	7,882				4,205								7,882	4,205
Oil and Gas Operations [Member]
Revenue													682	791	764
Operating (expense)													597	707	687
Depreciation, depletion and amortization													247	320	494
Lease of Retirement Center
Impairment of natural gas and oil properties														2,626
Total operating expenses													844	3,653	1,181
Interest income													37	25	23
Interest expense													(18)	(24)	(38)
Gain on prepayment of debt															888
Gain on sale of land
Recovery of bad debt															456
Other income (expense) net
Segment operating income (loss)													(143)	(2,861)
Assets	3,596				3,903				6,641				3,596	3,903	6,641
Corporate [Member]
Revenue
Operating (expense)													353	408	352
Depreciation, depletion and amortization
Lease of Retirement Center
Impairment of natural gas and oil properties
Total operating expenses													353	408	352
Interest income
Interest expense
Gain on prepayment of debt
Gain on sale of land															50
Recovery of bad debt															(110)
Other income (expense) net													12	28	(572)
Segment operating income (loss)													(341)	(380)
Assets	4,286				302				291				4,286	302	291
Discontinued Operations [Member]
Assets	$ 7,882												$ 7,882
Retirement Facility [Member]
Revenue														659	2,665
Operating (expense)														358	1,496
Depreciation, depletion and amortization														101	168
Lease of Retirement Center														205	997
Impairment of natural gas and oil properties
Total operating expenses														664	2,661
Interest income
Interest expense
Gain on prepayment of debt
Gain on sale of land
Recovery of bad debt
Other income (expense) net															4
Segment operating income (loss)														(5)
Assets									$ 246						$ 246