Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating activities
Net income	$ 475	$ 405
Adjustments to reconcile net income to net cash provided (used in) by operating activities:
Allowance for doubtful accounts	0	0
Inventories reserve	0	13
Deferred tax obligation	126	74
Depreciation and amortization	297	369
Share-based compensation expense	12	31
Changes in operating assets and liabilities:
Accounts receivable	(2,695)	(2,934)
Inventories	710	(148)
Prepaid expenses and other current assets	368	237
Other assets	10	9
Accounts payable	740	610
Accrued compensation and related taxes	143	(446)
Accrued warranty expense	21	17
Note payable	0	(18)
Deferred revenue	(26)	(66)
Accrued other expenses and other current liabilities	(45)	(18)
Net cash provided (used in) by operating activities	136	(1,865)
Investing activities
Purchases of property, plant and equipment	(137)	(50)
Capitalized software	0	(150)
Net cash used in investing activities	(137)	(200)
Financing activities
Proceeds from issuance of common stock	98	0
Cash provided by financing activities	98	0
Net change in cash and cash equivalents	97	(2,065)
Cash and cash equivalents, beginning of period	7,945	6,581
Cash and cash equivalents, end of period	8,042	4,516
Supplemental disclosure
Cash paid for interest	0	0
Income tax paid	0	0
Non-cash financing activity
Cashless exercise of stock options and related conversion of net shares to stockholders' equity	$ 1	$ 0