CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 28, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 2,647	$ 2,111
Restricted cash	1,150	705
Marketable securities	464	712
Accounts receivable, less allowances for doubtful receivables of $214 and $324, respectively	3,979	3,972
Costs and estimated earnings in excess of billings on uncompleted contracts	1,468	2,474
Inventories, net	3,508	3,125
Prepaid expenses and deposits	484	453
Total current assets	13,700	13,552
Property, plant and equipment, net	7,471	7,735
Goodwill	635	635
Definite-lived intangible assets, net	142	168
Other assets	1,533	2,160
Total assets	23,481	24,250
Current liabilities:
Accounts payable	788	1,197
Accrued liabilities	1,343	1,274
Billings in excess of costs and estimated earnings on uncompleted contracts	4,481	2,531
Customer deposits	2,616	3,180
Current portion of retirement obligations	485	517
Current portion of long-term debt	172	167
Total current liabilities	9,885	8,866
Pension and retirement obligations, net of current portion	32,994	33,369
Long-term debt, net of current portion	5,160	5,148
Deferred rent obligation	1,505	1,511
Total liabilities	49,544	48,894
Stockholders' deficit:
Preferred stock, no par value: 10,000,000 shares authorized; no shares outstanding
Common stock, $0.20 par value: 30,000,000 shares authorized; 11,441,666 shares issued	2,288	2,288
Additional paid-in capital	54,477	54,466
Common stock in treasury, at cost: 352,467 shares	(4,709)	(4,709)
Accumulated deficit	(50,807)	(49,025)
Accumulated other comprehensive loss	(27,312)	(27,664)
Total stockholders' deficit	(26,063)	(24,644)
Total liabilities and stockholders' deficit	$ 23,481	$ 24,250