CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities:
Net income (loss)	$ 3,147,000	$ (3,025,000)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Impairment of intangible assets	0	129,000
Goodwill impairment	0	795,000
Share-based compensation expense	152,000	656,000
Amortization of intangible assets	0	98,000
Depreciation and amortization	270,000	278,000
Bond premium amortization	1,000	1,000
Loss of fixed asset disposal	8,000	0
Gain on sale of marketable securities	(45,000)	(129,000)
Deferred income	(86,000)	(85,000)
Changes in operating assets and liabilities:
Increase in accounts receivable	(1,014,000)	(70,000)
Increase in inventories	(923,000)	(3,000)
Decrease in costs and earnings in excess of billings	468,000	611,000
Decrease (increase) in other current assets	793,000	(756,000)
Decrease in other assets	7,000	555,000
(Decrease) increase in liability associated with former chief executive officer	(1,065,000)	1,688,000
Increase (decrease) in accounts payable	10,000	(290,000)
(Decrease) increase in customer advances	(103,000)	86,000
Increase (decrease) in taxes payable	30,000	(57,000)
Increase (decrease) in accrued expenses	299,000	(51,000)
Net cash provided by operating activities	1,949,000	431,000
Cash flows from investing activities:
Sale of marketable securities	156,000	928,000
Purchase of property and equipment	(130,000)	(204,000)
Purchase of marketable securities	(252,000)	0
Sale of property and equipment	6,000	0
Proceeds on disposal of property and equipment	4,000	0
Net cash (used in) provided by investing activities	(216,000)	724,000
Cash flows from financing activities:
Restricted cash	(671,000)	0
Purchase of treasury stock	0	(2,000)
Repayments of long-term debt	(931,000)	(1,072,000)
Repayments of note payable-bank	(387,000)	(601,000)
Proceeds from exercise of stock options	1,000	163,000
Net cash used in financing activities	(1,988,000)	(1,512,000)
Net decrease in cash and cash equivalents	(255,000)	(357,000)
Cash and cash equivalents at beginning of year	1,964,000	2,321,000
Cash and cash equivalents at end of year	1,709,000	1,964,000
Supplemental disclosure of cash flow information:
Cash paid during the year for interest	193,000	231,000
Cash paid during the year for income taxes	$ 57,000	$ 69,000