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Fair Value Disclosures (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2012
Fair Value Disclosures (Additional Textual) [Abstract]    
Cash equivalents consisting of money market funds with maturities 90 days 90 days
Transfers of assets between fair value hierarchy levels $ 0 $ 0
Money Market Funds [Member]
   
Fair Value Disclosures (Textual) [Abstract]    
Cash equivalents consisting of money market funds $ 3,100,000 $ 3,100,000