Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities:
Net loss	$ (7,070)	$ (47,439)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Goodwill and Intangible Asset Impairment	0	29,548
Depreciation and amortization	2,320	3,397
Deferred income tax expense	703	9,039
Loss on disposal of property and equipment	27	46
Stock-based compensation	1,378	1,630
Changes in operating assets and liabilities:
Receivables	1,669	(298)
Inventories	1,463	429
Prepaid income taxes / income taxes payable	281	(311)
Prepaid expenses and other assets	(328)	(384)
Trade accounts payable	(164)	545
Accrued compensation	869	341
Other accrued expenses and other current liabilities	152	(171)
Deferred revenue	(1,579)	1,283
Other long-term liabilities	(89)	669
Net cash used in operating activities	(368)	(1,676)
Cash flows from investing activities:
Purchase of cost method investment	(350)	0
Purchases of marketable securities	(19,505)	(39,502)
Sales and maturities of marketable securities	24,750	9,500
Issuances of notes receivable	0	(500)
Purchases of property and equipment	(874)	(2,187)
Proceeds from sale of property and equipment	1	2
Net cash provided by (used in) investing activities	4,022	(32,687)
Cash flows from financing activities:
Payments for Repurchase of Common Stock	0	(1,350)
Common stock repurchases to settle employee withholding liability	(53)	(28)
Payments of dividends	0	(5,180)
Principal payments on capital lease obligations	(17)	(15)
Proceeds from Stock Plans	4	0
Payments to Noncontrolling Interests	(50)	0
Net cash used in financing activities	(116)	(6,573)
Effect of exchange rate changes on cash	(74)	(19)
Net increase (decrease) in cash and cash equivalents	3,464	(40,955)
Cash and cash equivalents, beginning of period	28,644	70,161
Cash and cash equivalents, end of period	32,108	29,206
Supplemental disclosures of net cash paid (received) during the period for:
Income taxes	$ (992)	$ 256