CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 26, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 3,983	$ 3,376
Restricted cash	731	1,020
Marketable securities		229
Accounts receivable, less allowances for doubtful receivables of $246 and $277, respectively	4,810	5,552
Costs and estimated earnings in excess of billings on uncompleted contracts	2,178	2,391
Inventories, net	4,063	3,025
Prepaid expenses and deposits	506	568
Total current assets	16,271	16,161
Property, plant and equipment, net	7,339	7,405
Goodwill	635	635
Definite-lived intangible assets, net	80	115
Other assets	1,046	1,386
Total assets	25,371	25,702
Current liabilities:
Accounts payable	837	1,433
Accrued liabilities	1,150	1,183
Billings in excess of costs and estimated earnings on uncompleted contracts	3,661	3,358
Customer deposits	2,602	2,157
Current portion of retirement obligations	519	531
Current portion of long-term debt	2,408	2,995
Total current liabilities	11,177	11,657
Pension and retirement obligations, net of current portion	23,525	23,567
Long-term debt, net of current portion	3,004	2,362
Deferred rent obligation	1,526	1,514
Total liabilities	39,232	39,100
Commitments and contingencies (Note 4)
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	54,496	54,484
Common stock in treasury, at cost: 352,467 shares	(4,709)	(4,709)
Accumulated deficit	(48,632)	(47,852)
Accumulated other comprehensive loss	(17,304)	(17,609)
Total stockholders' deficit	(13,861)	(13,398)
Total liabilities and stockholders' deficit	$ 25,371	$ 25,702