Quarterly report pursuant to Section 13 or 15(d)

Cash Equivalents And Investments (Schedule Of Estimated Fair Value Of Available-For-Sale Securities) (Details)

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Cash Equivalents And Investments (Schedule Of Estimated Fair Value Of Available-For-Sale Securities) (Details) - Investments [Member]
$ in Thousands
Jun. 30, 2017
USD ($)
Schedule of Available-for-sale Securities [Line Items]  
Amortized Cost, Due within one year $ 1,445
Estimated Fair Value, Due within one year $ 1,445