CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 28, 2014	Mar. 29, 2013
Cash flows from operating activities:
Net (loss)	$ (551)	$ (1,357)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	128	172
Provision for excess and obsolete inventory	40	91
Amortization of deferred pension expense	102	182
Other	101	71
Change in assets and liabilities:
Decrease (increase) in restricted cash	19	(93)
Decrease (increase) in accounts receivable, net	368	(622)
Decrease (increase) in inventories	14	(404)
Decrease in costs and estimated earnings in excess of billings on uncompleted contracts	1,986	1,950
Decrease in prepaid expenses and deposits	59	135
Increase (decrease) in accounts payable	(655)	117
Decrease in accrued liabilities	(10)	(32)
Decrease in pension and retirement obligations	(14)	(156)
Decrease in customer deposits	(151)	(395)
Net cash provided by (used in) operating activities	1,436	(341)
Cash flows from investing activities:
Purchases of property, plant and equipment	(61)	(8)
Proceeds from sale of marketable securities	110	135
Net cash provided by investing activities	49	127
Cash flows from financing activities:
Principal payments on long-term debt	(43)	(41)
Net cash used in financing activities	(43)	(41)
Net increase (decrease) in cash and cash equivalents	1,442	(255)
Cash and cash equivalents as of beginning of the period	3,376	2,111
Cash and cash equivalents as of end of the period	4,818	1,856
Non-cash investing and financing activities:
Reclassification of realized gains from sale of marketable securities to net loss	0	(15)
Unrealized gain on marketable securities	0	22
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	130	132
Cash paid for income taxes	$ 39	$ 24