Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Operating activities:
Net income (loss)	$ (640)	$ 75
Reconciliation of net income (loss) to cash provided by operating activities:
Depreciation and amortization expense	2,256	2,093
Amortization of debt issuance costs	16	10
Compensation costs - stock options	10	22
Deferred rental income	(50)	(66)
Provision for losses on accounts receivable	17	30
Change in operating assets and liabilities:
Accounts receivable	493	(4,188)
Inventories	(152)	(33)
Prepaid expenses	(114)	(91)
Refundable income taxes		33
Other assets	(4)	6
Accounts payable	(1,237)	2,091
Accrued payroll and other compensation	300	127
Accrued income taxes	(41)	21
Other accrued taxes	(152)	(4)
Deferred revenues	546	872
Other liabilities and accrued expenses	87	228
Net cash provided by operating activities	1,335	1,226
Investing activities:
Capital expenditures	(1,464)	(2,408)
Cash released from restriction	79
Net cash used in investing activities	(1,385)	(2,408)
Financing activities:
Borrowings under line of credit facilities		1,025
Payments of debt issuance costs	(42)	(5)
Principal payments on term loan facility	(399)
Principal payments on capital lease obligations	(193)	(48)
Net cash provided by (used in) financing activities	(634)	972
Decrease in cash and cash equivalents	(684)	(210)
Cash and cash equivalents at beginning of period	2,299	1,814
Cash and cash equivalents at end of period	1,615	1,604
Supplemental disclosure of cash flow information:
Capital expenditures included in accounts payable	97	95
Significant non-cash investing and financing activities:
Capital lease obligations incurred	630	68
Cash paid during the period for interest	512	263
Cash paid during the period for income taxes	$ 122	$ 25