Income Taxes (Schedule Of Components Of Deferred Income Tax Assets/Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Income Taxes [Abstract]
Net operating loss carryforward	$ 106,288	$ 64,291
Research and experimental credits	44,765	48,511
State NOL carryforward	36,203	25,158
Foreign NOL carryforward	106
Stock-based compensation	5,155	3,425
Foreign tax credits	4,026	4,026
Inventories	2,895	1,999
State tax reserves		1,425
Accrued amounts	494	1,618
Capital loss carryforwards	232	1,008
Other tax credits	838	702
Other	939	905
Prepaids
Convertible Notes	(20,391)
Total deferred income tax assets, Gross	201,941	153,068
Valuation allowance	(181,521)	(152,952)
Total deferred income tax assets	20,420	116
Liabilities, Prepaids	(29)	(116)
Total deferred income tax liabilities	(20,420)	(116)
Net deferred income tax asset