Condensed Consolidated Balance Sheets (in thousands, except par value and share amounts) (Unaudited) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 92,972	$ 48,010
Short-term investments	67,859	129,709
Accounts receivable, net of allowances of $43 in 2011 and $0 in 2010	16,420	18,347
Inventories	23,558	25,789
Deferred income tax assets, net - current	324	204
Prepaid expenses and other current assets	1,993	2,314
Total current assets	203,126	224,373
Property and equipment, net	47,608	37,262
Long-term investments	15,720	19,180
Deferred income tax assets, net - long-term	39	39
Other assets	669	749
Total assets	267,162	281,603
Current liabilities:
Accounts payable	9,515	8,979
Accrued compensation and related benefits	6,625	8,792
Accrued liabilities	8,949	11,199
Total current liabilities	25,089	28,970
Non-current income tax liabilities	5,020	5,015
Other long-term liabilities		723
Total liabilities	30,109	34,708
Stockholders' equity:
Common stock, $0.001 par value, $34 and $35 in 2011 and 2010, respectively; shares authorized: 150,000,000; shares issued and outstanding: 33,693,751 and 35,063,033 in 2011 and 2010, respectively	156,164	178,269
Retained earnings	77,495	66,647
Accumulated other comprehensive income	3,394	1,979
Total stockholders’ equity	237,053	246,895
Total liabilities and stockholders’ equity	$ 267,162	$ 281,603