CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Statement of Cash Flows [Abstract]
Net income (loss)	$ (397)	$ (593)
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Depreciation, depletion and amortization	303	393
Write-off of assets from discontinued operations	24	0
Changes in operating assets and liabilities
Other current and non-current assets	153	(20)
Accounts payable and other liabilities	295	361
Net cash provided by (used) in operating activities	378	141
Cash flows from investing activities
Investment in undeveloped land	(10)	0
Fixed asset additions	(2)	(45)
Cash portion from the sale of land	0	0
Repayment of loan from affiliate	0	0
Net cash provided by (used in) investing activities	(12)	(45)
Cash flows from financing activities
Payment on notes payable	(52)	(39)
Net cash provided by (used in) financing activities	(52)	(39)
Net increase (decrease) in cash and cash equivalents	314	57
Cash and cash equivalents at beginning of year	113	473
Cash and cash equivalents at end of year	427	530
Supplemental disclosures of cash flow information:
Cash paid for interest on notes payable	19	13
Cash paid for principal on notes payable	$ 71	$ 66