Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Operating activities
Net income (loss)	$ 845	$ (1,543)
Adjustments to reconcile net loss to net cash provided by operating activities:
Allowance for doubtful accounts	(5)
Inventories reserve	(21)	52
Deferred tax obligation	492
Depreciation and amortization	641	704
Share-based compensation expense	18	91
Changes in operating assets and liabilities:
Accounts receivable	(1,391)	1,372
Inventories	914	(1,102)
Prepaid expenses and other current assets	(456)	90
Other assets	18	23
Accounts payable	406	(826)
Accrued compensation and related taxes	397	38
Accrued warranty expense	(4)	20
Note payable	53
Deferred revenue	41	192
Accrued other expenses and other current liabilities	(123)	(46)
Net cash provided by (used in ) operating activities	1,825	(935)
Investing activities
Purchases of property, plant and equipment	(138)	(181)
Net cash used in investing activities	(138)	(181)
Financing activities
Proceeds from issuance of common stock	22
Increase in revolving line of credit		1,500
Decrease in revolving line of credit		(1,200)
Cash provided by financing activities	22	300
Net change in cash and cash equivalents	1,709	(816)
Cash and cash equivalents, beginning of period	2,693	5,050
Cash and cash equivalents, end of period	4,402	4,234
Supplemental disclosure
Cash paid for interest	3	62
Income tax paid	62
Non-cash financing activity
Cashless exercise of stock options and related conversion of net shares to stockholders' equity	$ 4