Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating activities
Net income (loss)	$ 2,065	$ (493)	$ (660)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Allowance for doubtful accounts	(5)		17
Inventories reserve	67	148	271
Deferred tax obligation	763	(368)	12
Depreciation and amortization	1,355	1,412	811
Share-based compensation expense	27	172	281
Excess tax benefit from share-based payment arrangement			(20)
Changes in operating assets and liabilities:
Accounts receivable	2,098	(255)	(150)
Inventories	(1,264)	(354)	(5,590)
Prepaid expenses and other current assets	(389)	177	193
Other assets	(111)	43	89
Accounts payable	(624)	(997)	1,503
Accrued compensation and related taxes	678	12	(291)
Accrued warranty expense	20	(19)	38
Deferred revenue	58	264	386
Note payable	18
Accrued other expenses and other current liabilities	(152)	116	7
Net cash provided by (used in) operating activities	4,604	(142)	(3,103)
Investing activities
Purchases of property, plant and equipment	(375)	(215)	(465)
Capitalized software	(364)		(1,149)
Net cash used in investing activities	(739)	(215)	(1,614)
Financing activities
Proceeds from issuance of common stock	23		87
Excess tax benefit from share-based payment arrangement			20
Proceeds from debt		1,500	2,000
Repayment of revolving credit line		(3,500)
Net cash provided by (used in) financing activities	23	(2,000)	2,107
Increase (decrease) in cash	3,888	(2,357)	(2,610)
Cash and cash equivalents, beginning of period	2,693	5,050	7,660
Cash and cash equivalents, end of period	6,581	2,693	5,050
Supplemental disclosure
Cash paid for interest	4	107	30
Cash paid for income taxes	92		11
Non-cash financing activity
Cashless exercise of stock options	$ 4	$ 6	$ 7