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Exit Costs Related to Office Space (Tables)
 12 Months Ended
Sep. 30, 2012
Exit Costs Related to Office Space  
Schedule of reconciliation of the beginning and ending lease liability balance

The following is a reconciliation of the beginning and ending lease liability balance at September 30, 2011 and 2012:

 
   2011   2012  

Beginning lease liability

   $ 264   $ 71  

Less: Lease payments

     (182 )   (59 )

Less: Change in liability resulting from sublet space

     (22 )   (12 )

Add: Accretion expense

     11     —  
           

Lease liability balance at September 30

   $ 71   $ —