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Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Sep. 30, 2019
Equity [Abstract]    
Cumulative effect of foreign currency translation $ (5,109) $ (5,111)
Cumulative unrealized loss on pension liability (7,482) (7,482)
Accumulated other comprehensive loss $ (12,591) $ (12,593)