Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Operating activities
Net income	$ 1,116	$ 1,729
Adjustments to reconcile net income to net cash provided by operating activities:
Allowance for doubtful accounts	0	(5)
Inventories reserve	108	6
Deferred tax obligation	548	938
Depreciation and amortization	1,119	975
Share-based compensation expense	36	23
Changes in operating assets and liabilities:
Accounts receivable	(1,721)	(449)
Inventories	1,793	(174)
Prepaid expenses and other current assets	(456)	(411)
Other assets	7	(119)
Accounts payable	(194)	795
Accrued compensation and related taxes	(611)	739
Accrued warranty expense	14	(24)
Note payable	(18)	35
Deferred revenue	(212)	55
Accrued other expenses and other current liabilities	34	(87)
Net cash provided by operating activities	1,563	4,026
Investing activities
Purchases of property, plant and equipment	(208)	(349)
Capitalized software	(340)	(160)
Net cash used in investing activities	(548)	(509)
Financing activities
Proceeds from issuance of common stock	34	22
Cash provided by financing activities	34	22
Net change in cash and cash equivalents	1,049	3,539
Cash and cash equivalents, beginning of period	6,581	2,693
Cash and cash equivalents, end of period	7,630	6,232
Supplemental disclosure
Cash paid for interest	0	3
Income tax paid	0	62
Non-cash financing activity
Cashless exercise of stock options and related conversion of net shares to stockholders' equity	$ 9	$ 4