CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities:
Net loss	$ (2,105)	$ (4,644)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	954	1,150
Provision for excess and obsolete inventory	361	1,777
Loss on condemnation of property	667
Other	378	525
Changes in assets and liabilities:
Decrease in restricted cash	100	435
Decrease (increase) in accounts receivable	2,644	(2,345)
Decrease (increase) in inventories	(552)	1,867
Decrease (increase) in costs and estimated earnings in excess of billings on uncompleted contracts, net	511	(123)
Increase in prepaid expenses and other assets	(304)	(639)
Increase (decrease) in accounts payable	52	(150)
Decrease in accrued liabilities	(1,099)	(538)
Increase in accrued pension and retirement liabilities	1,004	1,202
Increase (decrease) in customer deposits	616	(1,265)
Net cash provided by (used in) operating activities	3,227	(2,748)
Cash flows from investing activities:
Purchases of property, plant and equipment	(286)	(113)
Proceeds from sale of marketable securities	603	1,232
Net cash provided by investing activities	317	1,119
Cash flows from financing activities:
Net borrowings on line-of-credit agreement	(500)	190
Principal payments on long-term debt	(136)	(137)
Net cash provided by (used in) financing activities	(636)	53
Net change in cash and cash equivalents	2,908	(1,576)
Cash and cash equivalents at beginning of the year	1,024	2,600
Cash and cash equivalents at end of the year	3,932	1,024
Non-cash investing and finance activities
Increase to minimum pension and retirement obligation	8,245	1,457
Unrealized gain (loss) on marketable securities	(201)	678
Transfer of inventory to property, plant & equipment	82
Reduction of long-term debt due to condemnation of property & equipment	153
Cash paid during the year for:
Interest	547	569
Income taxes	$ 59	$ 52