CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net income (loss)	$ 1,173	$ (2,279)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	581	744
Amortization of deferred pension costs	728
Provision for excess and obsolete inventory	349	409
Other	313	221
Changes in assets and liabilities:
Decrease (increase) in restricted cash	(315)	357
Decrease (increase) in accounts receivable	(1,692)	56
Decrease (increase) in inventories	(249)	90
Decrease (increase) in costs and estimated earnings in excess of billings on uncompleted contracts, net	910	(1,925)
Decrease (increase) in prepaid expenses and other assets	659	(65)
Increase (decrease) in accounts payable	236	(293)
Decrease in accrued liabilities	(88)	(444)
Increase (decrease) in accrued pension and retirement liabilities	(455)	93
Increase (decrease) in customer deposits	(1,023)	346
Net cash provided by (used in) operating activities	1,127	(2,690)
Cash flows from investing activities:
Purchases of property and equipment	(198)	(122)
Proceeds from sale of marketable securities	503	1,148
Net cash provided by investing activities	305	1,026
Cash flows from financing activities:
Principal payments on long-term debt	(167)	(157)
Net cash used in financing activities	(167)	(157)
Net increase (decrease) in cash and cash equivalents	1,265	(1,821)
Cash and cash equivalents as of beginning of the year	2,111	3,932
Cash and cash equivalents as of end of the year	3,376	2,111
Non-cash investing and financing activities
Reclassification of realized gains from sale of marketable securities to net income (loss)	(27)	(7)
Unrealized gain on marketable securities	20	194
Decrease (increase) to minimum pension liability	9,334	(720)
Supplemental disclosure of cash flow information
Cash paid for interest	539	538
Cash paid for income taxes	$ 9	$ 42