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Inventories And Warranties (Schedule Of Changes In Estimated Warranty Liability) (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Inventories And Warranties [Abstract]    
Balance at beginning of period $ 694 $ 985
Accrual for warranties 246 466
Warranty revision 4 (14)
Settlements made during the period (408) (523)
Balance at end of period $ 536 $ 914
Product warranties time frame, years 1 year