Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Operating activities:
Net loss	$ (1,167)	$ (3,757)
Adjustments to reconcile net loss to net cash provided by (used for) operating activities:
Depreciation	87	153
Amortization	381	389
Stock-based compensation	75	87
Changes in operating assets and liabilities:
Accounts receivable, net	(306)	967
Inventories	254	218
Prepaid expenses and current assets	233	259
Accounts payable	(608)	(683)
Accrued expenses and other liabilities	(561)	(868)
Net cash used for operating activities	(1,612)	(3,235)
Investing activities:
Purchases of property and equipment	(28)	(81)
Sales and maturities of marketable securities		2,639
Net cash provided by (used for) investing activities	(28)	2,558
Effect of exchange rate changes on cash	(132)	43
Decrease in cash and cash equivalents	(1,772)	(634)
Cash and cash equivalents at beginning of period	2,656	3,564
Cash and cash equivalents at end of period	$ 884	$ 2,930