CONSOLIDATED STATEMENT OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities
Net income (loss)	$ 126	$ (134)
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Depreciation, depletion and amortization	23	67
Other current and non-current assets	(100)	21
Accounts payable and other liabilities	65	47
Net cash provided by (used) in operating activities	114	1
Cash flows from financing activities
Payment on notes payable	(15)	(23)
Net cash provided by (used in) financing activities	(15)	(23)
Net increase (decrease) in cash and cash equivalents	99	(22)
Cash and cash equivalents at beginning of year	361	419
Cash and cash equivalents at end of period	460	397
Supplemental disclosures of cash flow information
Cash paid for interest on notes payable	$ 5	$ 6