CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net income (loss)	$ (1,305)	$ 1,173
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	465	581
Amortization of deferred pension costs	406	728
Provision for excess and obsolete inventory	197	349
Other	190	313
Changes in assets and liabilities:
Decrease (increase) in restricted cash	309	(315)
Decrease (increase) in accounts receivable	979	(1,692)
Increase in inventories	(1,335)	(249)
Decrease in costs and estimated earnings in excess of billings on uncompleted contracts, net	2,510	910
Decrease in prepaid expenses and other assets	326	659
Increase (decrease) in accounts payable	(723)	236
Decrease in accrued liabilities	(29)	(88)
Increase (decrease) in accrued pension and retirement liabilities	91	(455)
Increase (decrease) in customer deposits	1,924	(1,023)
Net cash provided by operating activities	4,005	1,127
Cash flows from investing activities:
Purchases of property and equipment	(395)	(198)
Proceeds from sale of marketable securities	229	503
Net cash provided by (used in) investing activities	(166)	305
Cash flows from financing activities:
Principal payments on long-term debt	(177)	(167)
Net cash used in financing activities	(177)	(167)
Net increase in cash and cash equivalents	3,662	1,265
Cash and cash equivalents as of beginning of the year	3,376	2,111
Cash and cash equivalents as of end of the year	7,038	3,376
Supplemental disclosures of non-cash investing and financing activities
Increase in minimum pension liability	16,422	9,334
Disposal of building and accrued lease obligations	9,378
Reclassification of realized gains from sale of marketable securities to net income (loss)		(27)
Unrealized gain on marketable securities		20
Supplemental disclosures of cash flow information
Cash paid during the year for: Interest	425	539
Cash paid during the year for: Income taxes	$ 22	$ 9