CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Details
Net income	$ 1,481	$ 1,743
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	259	294
Decrease (increase) in deferred pension costs	(30)	258
Provision for excess and obsolete inventory	105	344
Other	34	196
Changes in operating assets and liabilities:
Decrease (increase) in accounts receivable	(380)	1,533
Decrease (increase) in lease receivable	252	(1,335)
Increase in inventories	(327)	(23)
Decrease (increase) in costs and estimated earnings in excess of billings on uncompleted contracts, net	(1,651)	2,162
Increase in prepaid expenses and other assets	(543)	(4)
Increase in accounts payable	509	96
Increase (decrease) in accrued liabilities	(488)	369
Decrease in accrued pension and retirement liabilities	(201)	(468)
Increase (decrease) in customer deposits	305	(994)
Decrease in deferred rent obligation	(423)	(422)
Net cash provided by (used in) operating activities	(1,098)	3,749
Cash flows from investing activities:
Purchases of property and equipment	(148)	(174)
Net cash used in investing activities	(148)	(174)
Cash flows from financing activities:
Proceeds from shares issued on exercise of options	0	71
Principal payments on long-term debt	(211)	(199)
Principal payments on pension settlement obligation	(381)	(356)
Net cash used in financing activities	(592)	(484)
Net increase (decrease) in cash, cash equivalents, and restricted cash	(1,838)	3,091
Cash, cash equivalents, and restricted cash as of beginning of the year	7,426	4,335
Cash, cash equivalents, and restricted cash as of end of the year	5,588	7,426
Cash paid during the year for:
Interest	478	516
Income taxes	$ 141	$ 11