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Reconciliation of the Total Amounts of Unrecognized Tax Liabilities (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2013
Income Tax Disclosure [Abstract]      
Unrecognized Tax Liabilities, Beginning Balance $ 301 $ 314 $ 355
Change in prior year tax positions (187) 9 (22)
Current tax positions 17 23 142
Settlements with taxing authorities   0 (47)
Lapse of statute of limitations (56) (45) (114)
Unrecognized Tax Liabilities, Ending Balance $ 75 $ 301 $ 314