J. OPERATING SEGMENTS (Details) - USD ($) $ 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
Revenue	$ 119	$ 127	$ 164	$ 180	$ 138	$ 167	$ 173	$ 204	$ 159	$ 194	$ 243	$ 195	$ 590	$ 682	$ 791
Operating (expense)													1,011	950	1,115
Depreciation, depletion and amortization													84	247	320
Lease of Retirement Center
Impairment of natural gas and oil properties		(2,285)							(2,626)				2,285		2,626
Total operating expenses	100	$ 176	$ 231	$ 179	144	$ 186	$ 239	$ 275	261	254	256	256	3,383	1,197	4,061
Interest income													257	37	25
Interest expense													(15)	(18)	(24)
Gain on prepayment of debt
Gain on sale of land
Other income (expense) net													199	12	28
Segment operating income (loss)									(2,849)	$ (90)	$ (124)	$ (172)	(2,551)	(484)	(3,241)
Assets	5,790				7,882				4,205				5,790	7,882	4,205
Oil and Gas Operations [Member]
Revenue													590	682	791
Operating (expense)													599	597	707
Depreciation, depletion and amortization													87	247	320
Lease of Retirement Center
Impairment of natural gas and oil properties													2,285		2,626
Total operating expenses													2,971	844	3,653
Interest income													257	37	25
Interest expense													(15)	(18)	(24)
Other income (expense) net
Segment operating income (loss)													(2,139)	(143)	(2,861)
Assets					3,596				3,903					3,596	3,903
Corporate [Member]
Revenue
Operating (expense)													412	353	408
Depreciation, depletion and amortization
Lease of Retirement Center
Impairment of natural gas and oil properties
Total operating expenses													412	353	408
Interest income
Interest expense
Other income (expense) net														12	28
Segment operating income (loss)													(412)	(341)	(380)
Assets					$ 4,286				302					$ 4,286	302
Discontinued Operations [Member]
Revenue															659
Operating (expense)															358
Depreciation, depletion and amortization															101
Lease of Retirement Center															205
Impairment of natural gas and oil properties
Total operating expenses															664
Interest income
Interest expense
Other income (expense) net
Segment operating income (loss)															(5)
Retirement Facility [Member]
Assets