Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Operating activities:
Net loss	$ (3,337)	$ (9,328)
Adjustments to reconcile net loss to net cash provided by (used for) operating activities:
Depreciation	551	377
Amortization	1,227	1,243
Goodwill impairment	3,175	11,685
Stock-based compensation	186	308
Deferred income taxes	(537)	321
Changes in operating assets and liabilities:
Accounts receivable, net	1,869	(98)
Inventories	1,192	(1,757)
Prepaid expenses and other receivables	(233)	(3,645)
Accounts payable	(1,046)	(703)
Accrued liabilities	(427)	(508)
Income taxes payable	554	(156)
Net cash provided by (used for) operating activities	3,174	(2,261)
Investing activities:
Payment of earn-outs		(2,361)
Purchases of marketable securities	(6,054)	(5,417)
Sales and maturities of marketable securities	4,992	6,691
Purchases of property and equipment	(293)	(566)
Net cash used for investing activities	(1,355)	(1,653)
Financing activities:
Proceeds from exercise of stock options	121	70
Net cash provided by financing activities	121	70
Effect of exchange rate changes on cash	302	(35)
Increase (decrease) in cash and cash equivalents	2,242	(3,879)
Cash and cash equivalents at beginning of period	5,224	8,021
Cash and cash equivalents at end of period	$ 7,466	$ 4,142