CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 1,998	$ 3,932
Restricted cash	816	1,062
Marketable securities	1,695	1,666
Accounts receivable, less allowances for doubtful receivables of $414 and $470, respectively	4,062	4,040
Costs and estimated earnings in excess of billings on uncompleted contracts	2,827	1,456
Inventories, net	3,256	3,624
Prepaid expenses and deposits	927	720
Total current assets	15,581	16,500
Property, plant and equipment, net	8,147	8,303
Goodwill	635	635
Intangible assets, net	210	224
Other assets	1,912	1,828
Total assets	26,485	27,490
Current liabilities:
Accounts payable	955	1,490
Accrued liabilities	1,742	1,749
Billings in excess of costs and estimated earnings on uncompleted contracts	2,654	3,438
Customer deposits	2,496	2,834
Current portion of retirement obligations	539	560
Current portion of long-term debt	158	155
Total current liabilities	8,544	10,226
Pension and retirement obligations, net of current portion	32,640	32,513
Long-term debt, net of current portion	5,144	5,136
Deferred rent obligation	1,484	1,480
Total liabilities	47,812	49,355
Commitments and contingencies
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	54,443	54,433
Common stock in treasury, at cost: 352,467 shares	(4,709)	(4,709)
Accumulated deficit	(46,386)	(46,746)
Accumulated other comprehensive loss	(26,963)	(27,131)
Total stockholders' deficit	(21,327)	(21,865)
Total liabilities and stockholders' deficit	$ 26,485	$ 27,490