CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 107,038	$ 201,937
Restricted cash	700	692
Available-for-sale securities-short-term portion	12,131	7,937
Accounts receivable, net	44,790	44,021
Inventories	41,545	42,851
Deferred tax assets-short-term portion	340	364
Property and equipment, net-held for sale	9,000	9,000
Prepaid expenses and other current assets	5,178	7,785
Total current assets	220,722	314,587
Available-for-sale securities-long-term portion	50,148	54,501
Property and equipment, net	28,180	30,583
Acquired technology rights, net	27,336	29,525
Deferred tax assets-long-term portion	430	450
Other long-term assets	8,219	8,369
Total assets	335,035	438,015
Current liabilities:
Accounts payable and accrued liabilities	39,182	44,774
Deferred revenue-short-term portion	9,635	9,852
Total current liabilities	48,817	54,626
Deferred revenue-long-term portion	3,727	3,959
Convertible notes	0	95,469
Other long-term liabilities	9,702	9,127
Stockholders' equity:
Common stock	705	704
Additional paid-in capital	752,569	750,332
Accumulated other comprehensive income	2,426	2,492
Accumulated deficit	(482,911)	(478,694)
Total stockholders' equity	272,789	274,834
Total liabilities and stockholders' equity	$ 335,035	$ 438,015