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J. OPERATING SEGMENTS (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
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, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Revenue | $ 159 | $ 194 | $ 243 | $ 195 |  |  |  |  | $ 157 | $ 232 | $ 259 | $ 172 | $ 791 | $ 764 | $ 820
Operating (expense) |  |  |  |  |  |  |  |  |  |  |  |  | 1,115 | 1,039 | 1,788
Depreciation, depletion and amortization |  |  |  |  |  |  |  |  |  |  |  |  | 320 | 494 | 617
Lease of Retirement Center |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Impairment of natural gas and oil properties | 2,626 | 0 | 0 | 0 |  |  |  |  | 2,717 | 0 | 0 | 0 | 2,626 | 0 | 2,717
Total operating expenses | 261 | 254 | 256 | 256 | $ 327 | $ 295 | $ 233 | $ 396 | 363 | 527 | 440 | 470 | 4,061 | 1,533 | 5,122
Interest income |  |  |  |  |  |  |  |  |  |  |  |  | 25 | 23 | 12
Interest expense |  |  |  |  |  |  |  |  |  |  |  |  | (24) | (38) | (62)
Gain on prepayment of debt |  |  |  |  | 888 | 0 | 0 | 0 |  |  |  |  | 0 | 888 | 0
Gain on sale of land |  |  |  |  | 50 | 0 | 0 | 0 |  |  |  |  | 0 | 50 | 0
Recovery of bad debt |  |  |  |  |  |  |  |  | 0 | 306 | 386 | 738 | 0 | 0 | 1,430
Other income (expense) net |  |  |  |  |  |  |  |  |  |  |  |  | 28 | (110) | (32)
Segment operating income (loss) | (2,849) | $ (90) | $ (124) | $ (172) | 738 | $ (170) | $ (171) | $ (353) | (3,053) | $ (179) | $ 26 | $ 252 | (3,241) | 44 | (2,954)
Assets | 4,205 |  |  |  | 7,178 |  |  |  | 8,445 |  |  |  | 4,205 | 7,178 | 8,445
Oil and Gas Operations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  |  |  |  | 764 | 820
Operating (expense) |  |  |  |  |  |  |  |  |  |  |  |  | 707 | 687 | 1,183
Depreciation, depletion and amortization |  |  |  |  |  |  |  |  |  |  |  |  | 320 | 494 | 617
Lease of Retirement Center |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Impairment of natural gas and oil properties |  |  |  |  |  |  |  |  |  |  |  |  | 2,626 | 0 | 2,717
Total operating expenses |  |  |  |  |  |  |  |  |  |  |  |  | 3,653 | 1,181 | 4,517
Interest income |  |  |  |  |  |  |  |  |  |  |  |  | 25 | 23 | 0
Interest expense |  |  |  |  |  |  |  |  |  |  |  |  | (24) | (38) | (62)
Gain on prepayment of debt |  |  |  |  |  |  |  |  |  |  |  |  |  | 888 |
Gain on sale of land |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |
Other income (expense) net |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Segment operating income (loss) |  |  |  |  |  |  |  |  |  |  |  |  | (2,861) | 421 | (3,759)
Assets | 3,903 |  |  |  | 6,641 |  |  |  | 7,420 |  |  |  | 3,903 | 6,641 | 7,420
Corporate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0
Operating (expense) |  |  |  |  |  |  |  |  |  |  |  |  | 408 | 352 | 605
Depreciation, depletion and amortization |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Lease of Retirement Center |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Impairment of natural gas and oil properties |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Total operating expenses |  |  |  |  |  |  |  |  |  |  |  |  | 408 | 352 | 605
Interest income |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 12
Interest expense |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Gain on prepayment of debt |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |
Gain on sale of land |  |  |  |  |  |  |  |  |  |  |  |  |  | 50 |
Other income (expense) net |  |  |  |  |  |  |  |  |  |  |  |  | 28 | (110) | (32)
Segment operating income (loss) |  |  |  |  |  |  |  |  |  |  |  |  | (380) | (572) | 805
Assets | 303 |  |  |  | 291 |  |  |  | 1,025 |  |  |  | 303 | 291 | 1,025
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 |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |
Total operating expenses |  |  |  |  |  |  |  |  |  |  |  |  | 664 |  |
Interest income |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |
Interest expense |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |
Other income (expense) net |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |
Segment operating income (loss) |  |  |  |  |  |  |  |  |  |  |  |  | (5) |  |
Assets | $ 0 |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  |
Retirement Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,665 | 2,997
Operating (expense) |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,496 | 1,623
Depreciation, depletion and amortization |  |  |  |  |  |  |  |  |  |  |  |  |  | 168 | 62
Lease of Retirement Center |  |  |  |  |  |  |  |  |  |  |  |  |  | 997 | 980
Impairment of natural gas and oil properties |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0
Total operating expenses |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,661 | 2,665
Interest income |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0
Interest expense |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |
Gain on prepayment of debt |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |
Gain on sale of land |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |
Other income (expense) net |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0
Segment operating income (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  | 4 | 332
Assets |  |  |  |  | $ 246 |  |  |  | $ 430 |  |  |  |  | $ 246 | $ 430

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