Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Details)

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Fair Value Measurements (Details) (Level 1, Recurring Basis, Money market funds, USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Level 1 | Recurring Basis | Money market funds
   
Fair Value Measurements    
Cash and cash equivalents $ 25,639 $ 20,682