K. OPERATING SEGMENTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating Revenue			$ 123
Depreciation, depletion and amortization			43
Impairment of natural gas and oil properties
Total operating expenses			59
Interest income			37
Interest expense			(18)
Other income (expense) net			11
Segment operating income (loss)			(265)
Current Operations [Member]
Operating Revenue	$ 101	$ 98	123
Operating Expense	60	50	50
Depreciation, depletion and amortization	12	11	9
Impairment of natural gas and oil properties
Total operating expenses	72	61	59
Interest income
Interest expense
Gain in sale of oil & gas operations
Other income (expense) net
Segment operating income (loss)	29	37	64
Corporate [Member]
Operating Revenue
Operating Expense	390	412	353
Depreciation, depletion and amortization	6	6	6
Impairment of natural gas and oil properties
Total operating expenses	396	418	359
Interest income	242	257	37
Interest expense	(12)	(15)	(18)
Gain in sale of oil & gas operations
Other income (expense) net	85	199	11
Segment operating income (loss)	(81)	23	(329)
Total [Member]
Operating Revenue	101	98	123
Operating Expense	450	462	403
Depreciation, depletion and amortization	18	17	15
Impairment of natural gas and oil properties		2,285
Total operating expenses	72	61	59
Interest income	242	257	37
Interest expense	(12)	(15)	(18)
Gain in sale of oil & gas operations
Other income (expense) net	85	199	11
Segment operating income (loss)	(52)	60	(265)
Discontinued Oil and Gas Operations [Member]
Operating Revenue	225	492	559
Operating Expense	395	550	540
Depreciation, depletion and amortization		69	238
Impairment of natural gas and oil properties		2,285
Total operating expenses	395	2,904	778
Interest income
Interest expense
Gain in sale of oil & gas operations	2,138
Other income (expense) net
Segment operating income (loss)	$ 1,968	$ (2,412)	$ (219)