CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 29, 2012	Jul. 01, 2011
Cash flows from operating activities:
Net loss	$ (1,124)	$ (1,687)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	392	495
Other	439	228
Change in assets and liabilities:
Decrease in restricted cash	283	302
Decrease in accounts receivable, net	574	1,926
Decrease (increase) in inventories	(81)	165
Decrease (increase) in costs and estimated earnings in excess of billings on uncompleted contracts	(1,779)	289
Increase in prepaid expenses and deposits	(406)	(241)
Decrease in accounts payable	(497)	(473)
Decrease in accrued liabilities	(266)	(641)
Increase in pension and retirement obligations	114	315
Increase in customer deposits	521	1,325
Net cash provided by (used in) operating activities	(1,830)	2,003
Cash flows from investing activities:
Purchases of property, plant and equipment	(64)	(127)
Proceeds from sale of marketable securities	275	320
Net cash provided by investing activities	211	193
Cash flows from financing activities:
Net principal payments on line-of-credit agreement		(500)
Principal payments on long-term debt	(76)	(74)
Net cash used in financing activities	(76)	(574)
Net increase (decrease) in cash and cash equivalents	(1,695)	1,622
Cash and cash equivalents at beginning of the period	3,932	1,024
Cash and cash equivalents at end of the period	2,237	2,646
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	272	273
Cash paid for income taxes	38	51
Non-cash investing and financing activities:
Unrealized gain on marketable securities	$ 104	$ 3