CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 29, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 10,348	$ 32,695
Short-term marketable securities	31,418	24,127
Accounts receivable, net	13,568	17,329
Inventories	17,524	19,733
Prepaid expenses and other current assets	3,713	3,198
Total current assets	76,571	97,082
Marketable securities	20,436	36,756
Plant and equipment:
Equipment and furniture	200,707	199,908
Leasehold improvements	46,762	46,667
Projects in process	1,868	2,049
Plant and equipment, gross	249,337	248,624
Less accumulated depreciation and amortization	(204,761)	(193,900)
Plant and equipment, net	44,576	54,724
Other assets	218	239
Total assets	141,801	188,801
Current liabilities:
Accounts payable	13,784	11,905
Accrued liabilities	5,572	7,946
Accrued restructuring costs	517	0
Total current liabilities	19,873	19,851
Other long-term liabilities	2,120	2,425
Commitments and contingencies
Stockholders' equity:
Common stock, $0.01 par value, 144,000 shares authorized, 71,426 issued at September 29, 2012 and 69,394 issued at December 31, 2011	714	694
Additional paid-in capital	609,433	602,757
Accumulated deficit	(492,905)	(439,113)
Accumulated other comprehensive income	2,825	2,446
Treasury stock at cost: 115 shares	(259)	(259)
Total stockholders' equity	119,808	166,525
Total liabilities and stockholders' equity	$ 141,801	$ 188,801