CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 26, 2014	Sep. 27, 2013
Cash flows from operating activities:
Net loss	$ (780)	$ (793)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	376	452
Amortization of deferred pension expense	305	546
Other	294	471
Change in assets and liabilities:
Decrease (increase) in restricted cash	289	(333)
Decrease (increase) in accounts receivable, net	726	(1,287)
Increase in inventories	(1,104)	(1,062)
Decrease in costs and estimated earnings in excess of billings on uncompleted contracts	516	1,813
Decrease in prepaid expenses and deposits	402	633
Increase (decrease) in accounts payable	(596)	689
Decrease in accrued liabilities	(21)	(102)
Decrease in pension and retirement obligations	(54)	(549)
Increase in customer deposits	445	419
Net cash provided by operating activities	798	897
Cash flows from investing activities:
Purchases of property, plant and equipment	(289)	(30)
Proceeds from sale of marketable securities	229	385
Net cash (used in) provided by investing activities	(60)	355
Cash flows from financing activities:
Principal payments on long-term debt	(131)	(123)
Net cash used in financing activities	(131)	(123)
Net increase in cash and cash equivalents	607	1,129
Cash and cash equivalents as of beginning of the period	3,376	2,111
Cash and cash equivalents as of end of the period	3,983	3,240
Non-cash investing and financing activities:
Reclassification of realized gains from sale of marketable securities to net income (loss)		(26)
Unrealized gain on marketable securities		18
Supplemental disclosures of cash flow information:
Cash paid for interest	390	397
Cash paid for income taxes	$ 45	$ 26