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Lease Abandonment Accrual (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2009
Jun. 30, 2012
Lease Abandonment Accrual    
Lease abandonment expense $ 600,000  
Changes in the lease abandonment liability    
Balance at the beginning of the period   363,000
Lease payments to lessor   (210,000)
Sublease proceeds   126,000
Imputed interest expense   4,000
Balance at the end of the period   $ 283,000