Income Taxes (Principal Components Of Deferred Taxes Assets)(Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred tax assets:
Deferred Tax Assets Depreiciation And Amortization	$ 809	$ 1,000
Depreciation and amortization	809	1,000
Accrued, allowance and others	2,881	4,054
Capitalized research and development	28	167
Net operating losses	203,294	206,378
Tax credits	7,366	7,398
Unrealized losses on marketable securities	416	422
Total deferred tax assets	214,794	219,419
Less: valuation allowance	(214,794)	(219,419)
Deferred Tax Assets, Net	$ 0	$ 0