CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 3,932	$ 1,024
Restricted cash	1,062	1,162
Marketable securities	1,666	2,376
Accounts receivable, net	4,040	6,654
Costs and estimated earnings in excess of billings on uncompleted contracts	1,456	2,094
Inventories, net	3,624	3,515
Prepaid expenses and deposits	720	1,289
Total current assets	16,500	18,114
Property, plant and equipment, net	8,303	9,592
Goodwill	635	635
Intangible assets, net	224	343
Other assets	1,828	1,276
Total assets	27,490	29,960
Current liabilities:
Accounts payable	1,490	1,438
Accrued liabilities	1,749	2,873
Billings in excess of costs and estimated earnings on uncompleted contracts	3,438	3,565
Customer deposits	2,834	2,218
Current portion of retirement obligations	560	604
Current portion of long-term debt	155	648
Total current liabilities	10,226	11,346
Pension and retirement obligations, net of current portion	32,513	23,220
Long-term debt, net of current portion	5,136	5,302
Deferred rent obligation	1,480	1,454
Total liabilities	49,355	41,322
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	54,433	54,385
Common stock in treasury, at cost, 352,467 shares	(4,709)	(4,709)
Accumulated deficit	(46,746)	(44,641)
Accumulated other comprehensive loss	(27,131)	(18,685)
Total stockholders' deficit	(21,865)	(11,362)
Total liabilities and stockholders' deficit	$ 27,490	$ 29,960