Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Condensed Consolidated Statements of Cash Flows [Abstract]
Net income	$ 382	$ 9,423
Impairment loss on Lynch Systems' assets	0	20
Depreciation	699	645
Amortization of finite-lived intangible assets	144	112
Gain on disposal of Lynch property	(6)	0
Stock-based compensation	363	185
Deferred income tax provision (benefit)	5	(3,276)
Decrease (increase) in accounts receivable, net	1,473	(1,003)
Decrease (increase) in inventories, net	271	(599)
(Decrease) in trade accounts payable, accrued compensation and commissions expense and other accrued liabilities	(895)	(106)
(Increase) decrease in other assets	(115)	102
Net cash provided by operating activities	2,321	5,503
Capital expenditures	1,694	767
Net cash used in investing activities	(1,694)	(767)
Net borrowings (repayments) on note payable to bank	3,026	(1,696)
Proceeds from issuance of common stock	6,562	0
Payment of expenses related to the public offering	(69)	0
Deferred costs related to stock issuance	0	(89)
Proceeds from long-term debt	548	0
Repayments of long-term debt	(817)	(2,620)
Purchase of treasury stock	(315)	0
Net cash provided by (used in) financing activities	8,935	(4,405)
Increase in cash and cash equivalents	9,562	331
Cash and cash equivalents at beginning of year	4,147	3,816
Cash and cash equivalents at end of year	13,709	4,147
Cash paid for income taxes	433	78
Cash paid for interest	91	318
Note receivable obtained in sale of property by Lynch Systems, net of costs	$ 299