CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities:
Net (loss) income	$ (1,375,000)	$ 524,000
Adjustments to reconcile net (loss) income to net cash used in operating activities:
Share-based compensation expense	52,000	40,000
Depreciation and amortization	66,000	69,000
Gain on sale of marketable securities	0	(5,000)
Bond premium amortization	1,000	0
Deferred income	0	(22,000)
Changes in operating assets and liabilities:
Accounts receivable	1,255,000	(643,000)
Inventories	(1,491,000)	(1,143,000)
Costs and estimated earnings in excess of billings on uncompleted contracts	0	(64,000)
Other current assets	31,000	61,000
Other assets	2,000	2,000
Accounts payable	549,000	394,000
Accrued expenses	(331,000)	(50,000)
Income taxes payable	(30,000)	0
Income taxes receivable	(8,000)	0
Customer advances	11,000	(81,000)
Liability associated with non-renewal of senior officers' contracts	730,000	(578,000)
Net cash used in operating activities	(538,000)	(1,496,000)
Cash flows from investing activities:
Purchase of property and equipment	(147,000)	(74,000)
Sale of property and equipment	0	6,000
Purchase of marketable securities	(4,000)	(98,000)
Sale of marketable securities	0	104,000
Net cash used in investing activities	(151,000)	(62,000)
Cash flows from financing activities:
Purchase of treasury stock	(402,000)	0
Proceeds from issuance of long-term debt	66,000	630,000
Stock option exercises	0	1,000
Restricted cash	(1,000)	0
Repayments of long-term debt	(233,000)	(233,000)
Net cash (used in) provided by financing activities	(570,000)	398,000
NET DECREASE IN CASH AND CASH EQUIVALENTS	(1,259,000)	(1,160,000)
Cash and cash equivalents - Beginning of period	1,709,000	1,964,000
CASH AND CASH EQUIVALENTS - End of period	450,000	804,000
Supplemental cash flow information:
Cash paid for interest	35,000	52,000
Cash paid for income taxes	$ 68,000	$ 16,000