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Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Cash flows from operating activities      
Net income (loss) from continuing operations $ (52) $ 60 $ (265)
Net income (loss) from discontinued operations 1,968 (2,412) (219)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities      
Gain on sale of oil and gas operations (2,138)
Depreciation, depletion and amortization     43
Impairment of oil & gas properties    
Changes in operating assets and liabilities      
Other current and non-current assets (197) 42 182
Accounts payable and other liabilities (128) (232) (378)
Net cash provided by (used) in operating activities (535) 239 (637)
Cash flows from investing activities      
Note receivables - related party (4,000)
Proceeds from the sale of discontinued operations 85
Fixed asset addition (68)
Collections of note receivable 508 12 40
Net cash provided by (used) in investing activities 593 (56) (3,960)
Cash flows from financing activities      
Payment on notes payable (53) (44) (70)
Proceeds from the sale of common stock 4,609
Net cash provided by (used) in financing activities (53) (44) 4,539
Net increase (decrease) in cash and cash equivalents 5 (339) (58)
Cash and cash equivalents at beginning of year 22 361 419
Cash and cash equivalents at end of year 27 22 361
Supplemental disclosures of cash flow information      
Cash paid for interest on notes payable: 15 15 18
Cash paid for principal on notes payable: $ 47 $ 44 $ 70