Income Taxes (Principal Components Of Deferred Taxes Assets)(Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred tax assets:
Depreciation and amortization	$ 747	$ 809
Accrued, allowance and others	2,637	2,881
Capitalized research and development		28
Net operating losses	204,173	203,294
Tax credits	7,676	7,366
Unrealized losses on marketable securities	397	416
Total deferred tax assets	215,630	214,794
Less: valuation allowance	(215,630)	(214,794)
Net deferred tax assets	$ 0	$ 0