Quarterly report pursuant to Section 13 or 15(d)

Marketable Securities (Schedule Of Marketable Securities) (Details)

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Marketable Securities (Schedule Of Marketable Securities) (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Marketable Securities [Line Items]    
Cost $ 2,250 $ 6,250
Gross Unrealized Gains 0 0
Gross Unrealized Losses 0 (1)
Fair Value 2,250 6,249
Certificates Of Deposit    
Marketable Securities [Line Items]    
Cost 2,250 6,250
Gross Unrealized Gains 0 0
Gross Unrealized Losses 0 (1)
Fair Value $ 2,250 $ 6,249