Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 136,507	$ 141,423
Short-term marketable securities	59,652	68,711
Accounts receivable, net	52,813	36,993
Inventories	36,845	37,278
Prepaid expenses and other current assets	19,915	16,200
Total current assets	305,732	300,605
Property and equipment, less accumulated depreciation	40,724	40,430
Long-term marketable securities	6,946	6,946
Other long-term assets	9,923	11,628
Intangible assets, net of amortization	17,641	18,377
Goodwill	44,808	44,808
Deferred income taxes	38,230	45,130
Total assets	464,004	467,924
Current liabilities:
Accounts payable and accrued expenses	33,221	31,842
Accrued payroll obligations	7,374	9,373
Deferred income and allowances on sales to sell-through distributors	13,981	10,761
Total current liabilities	54,576	51,976
Long-term liabilities	21,310	22,387
Total liabilities	75,886	74,363
Commitments and contingencies
Stockholders' equity:
Preferred stock, $.01 par value, 10,000,000 shares authorized, none issued and outstanding	0	0
Common stock, $.01 par value, 300,000,000 shares authorized, 118,213,000 and 117,675,000 shares issued and outstanding, excluding 194,000 shares of treasury stock at March 31, 2012	1,182	1,177
Paid-in capital	629,813	627,637
Accumulated other comprehensive income	(255)	(345)
Accumulated deficit	(242,622)	(234,908)
Total stockholders' equity	388,118	393,561
Total liabilities and stockholders' equity	$ 464,004	$ 467,924