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Other Financial Statement Data (Schedule Of Amortization Expense For Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Other Financial Statement Data [Abstract]
Developed technology		$ 108
Patents	154	200
Amortization expense	$ 154	$ 308

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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