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Commitments and Contingencies and Other Matters (Details 3) (USD $)
12 Months Ended 3 Months Ended
Dec. 31, 2011
Dec. 31, 2009
Jun. 30, 2009
Data Storage
Asset Impairment Charges      
Asset impairment charges $ 584,000 $ 304,000  
Impairment charges related to property and equipment     $ 300,000