CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Operating activities:
Net loss	$ (22,872)	$ (4,609)	$ (11,531)
Adjustments required to reconcile net loss to net cash flows used by operating activities:
Depreciation and amortization	1,918	2,220	2,669
Amortization of deferred financing fees	77	245	210
Benefit for doubtful accounts	(129)	(180)	(20)
Provision for excess and obsolete inventories	228	773	678
Non-cash restructuring (credits) charges, net	(5,558)	409	(6,257)
Stock-based compensation expense	2,474	2,358	1,305
Impairment of investments in non-publicly traded companies	0	0	31
Impairment of goodwill and other intangibles	14,312	0	10,075
Loss on retirement of property and equipment	35	0	0
Accrued royalty reversals, net	(2,363)	(418)	(197)
Other non-cash items	0	0	26
Changes in operating assets and liabilities:
Accounts receivable	1,661	3,940	1,218
Inventories	339	855	(357)
Prepaid expenses and other assets	232	95	248
Accounts payable	379	(3,056)	709
Accrued expenses and other current liabilities	(1,204)	(1,557)	(1,247)
Restructuring liabilities	(1,170)	(1,569)	(6,682)
Net cash used by operating activities	(11,641)	(494)	(9,122)
Investing activities:
Capital expenditures	(670)	(587)	(348)
Investments in non-publicly traded companies	(39)	(24)	(57)
Proceeds from the sale of investments in non-publicly traded companies	0	2,746	0
Change in restricted cash	484	2,150	2,120
Purchases of short and long-term investments	(6,516)	(1,582)	0
Proceeds from sales and maturities of short and long-term investments	5,486	609	2,970
Net cash (used) provided by investing activities	(1,255)	3,312	4,685
Financing activities:
Issuance of common stock under employee stock plans	322	83	108
Payments for deferred financing costs	0	(167)	0
Principal payments on 5.45% Convertible Notes due 2011	(3,758)	(5,004)	(1,251)
Proceeds from issuance of common stock, net of fees	16,073	6,317	0
Net cash provided (used) by financing activities	12,637	1,229	(1,143)
Effect of exchange rate changes on cash and cash equivalents	(568)	(110)	461
Change in cash and cash equivalents	(827)	3,937	(5,119)
Cash and cash equivalents at beginning of year	6,280	2,343	7,462
Cash and cash equivalents at end of year	$ 5,453	$ 6,280	$ 2,343