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Summary Of Significant Accounting Policies (Schedule Of Product Warranties) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Summary Of Significant Accounting Policies [Abstract]
Beginning balance	$ 548	$ 632
Net change	(108)	(84)
Ending balance	$ 440	$ 548

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

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