CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 28, 2013	Jun. 29, 2012
Cash flows from operating activities:
Net loss	$ (1,782)	$ (1,124)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	318	392
Other	644	439
Decrease (increase) in restricted cash	(445)	283
Decrease (increase) in accounts receivable, net	(21)	574
Increase in inventories	(565)	(81)
Decrease (increase) in costs and estimated earnings in excess of billings on uncompleted contracts	2,956	(1,779)
Decrease (increase) in prepaid expenses and deposits	596	(406)
Decrease in accounts payable	(409)	(497)
Increase (decrease) in accrued liabilities	63	(266)
Increase (decrease) in pension and retirement obligations	(407)	114
Increase (decrease) in customer deposits	(564)	521
Net cash provided by (used in) operating activities	384	(1,830)
Cash flows from investing activities:
Purchases of property, plant and equipment	(28)	(64)
Proceeds from sale of marketable securities	262	275
Net cash provided by investing activities	234	211
Cash flows from financing activities:
Principal payments on long-term debt	(82)	(76)
Net cash used in financing activities	(82)	(76)
Net increase (decrease) in cash and cash equivalents	536	(1,695)
Cash and cash equivalents at beginning of the period	2,111	3,932
Cash and cash equivalents at end of the period	2,647	2,237
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	265	272
Cash paid for income taxes	24	38
Non-cash investing and financing activities:
Unrealized gain (loss) on marketable securities	$ (11)	$ 104