CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities
Net income (loss)	$ 126	$ (97)
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Depreciation, depletion and amortization	37	23
Other current and non-current assets	45	(100)
Accounts payable and other liabilities	32	65
Net cash provided by (used) in operating activities	17	114
Cash flows from financing activities
Payment on notes payable	(12)	(15)
Net cash provided by (used in) financing activities	(12)	(15)
Net increase (decrease) in cash and cash equivalents	5	99
Cash and cash equivalents at beginning of year	22	361
Cash and cash equivalents at end of period	27	460
Supplemental disclosures of cash flow information
Cash paid for interest on notes payable	$ 3	$ 5