Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Operating activities
Net (loss) income	$ (493)	$ (660)	$ 2,363
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Allowance for doubtful accounts	0	17	5
Inventories reserve	148	271	245
Deferred tax benefit (expense)	(368)	12	1,406
Depreciation and amortization	1,412	811	672
Share-based compensation expense	172	281	55
Excess tax benefit from share-based payment arrangement	0	(20)	0
Changes in operating assets and liabilities:
Accounts receivable	(255)	(150)	(2,003)
Inventories	(354)	(5,590)	2,906
Prepaid expenses and other current assets	177	193	35
Other assets	43	89	4
Accounts payable	(997)	1,503	(599)
Accrued compensation and related taxes	12	(291)	469
Accrued warranty expense	(19)	38	(74)
Deferred revenue	264	386	0
Accrued other expenses and other current liabilities	116	7	85
Net cash (used in) provided by operating activities	(142)	(3,103)	5,569
Investing activities
Purchases of property, plant and equipment	(215)	(465)	(357)
Capitalized software	0	(1,149)	(1,527)
Net cash used in investing activities	(215)	(1,614)	(1,884)
Financing activities
Proceeds from issuance of common stock	0	87	0
Excess tax benefit from share-based payment arrangement	0	20	0
Proceeds from debt	1,500	2,000	0
Repayment of revolving credit line	(3,500)	0	(1,500)
Net cash (used in) provided by financing activities	(2,000)	2,107	(1,500)
(Decrease) increase in cash	(2,357)	(2,610)	2,185
Cash and cash equivalents, beginning of year	5,050	7,660	5,475
Cash and cash equivalents, end of year	2,693	5,050	7,660
Supplemental disclosure
Cash paid for interest	107	30	47
Cash paid for income taxes	0	11	50
Non-cash financing activity
Cashless exercise of stock options	$ 6	$ 7	$ 4