Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Operating activities
Net income	$ 1,142	$ 2,065
Adjustments to reconcile net income to net cash provided by operating activities:
Allowance for doubtful accounts	45	(5)
Inventories reserve	128	67
Deferred tax obligation	500	763
Depreciation and amortization	1,475	1,355
Share-based compensation expense	42	27
Changes in operating assets and liabilities:
Accounts receivable	(827)	2,098
Inventories	1,642	(1,264)
Prepaid expenses and other current assets	(1,006)	(389)
Other assets	22	(111)
Accounts payable	(182)	(624)
Accrued compensation and related taxes	(706)	678
Accrued warranty expense	25	20
Deferred revenue	(280)	58
Note payable	(18)	18
Accrued other expenses and other current liabilities	(12)	(152)
Net cash provided by operating activities	1,990	4,604
Investing activities
Purchases of property, plant and equipment	(338)	(375)
Capitalized software	(340)	(364)
Net cash used in investing activities	(678)	(739)
Financing activities
Proceeds from issuance of common stock	52	23
Net cash provided by financing activities	52	23
Increase in cash	1,364	3,888
Cash and cash equivalents, beginning of period	6,581	2,693
Cash and cash equivalents, end of period	7,945	6,581
Supplemental disclosure
Cash paid for interest		4
Cash paid for income taxes		92
Non-cash financing activity
Cashless exercise of stock options	$ 9	$ 4