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Acquisition (Pro Forma) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Business Combinations [Abstract]        
Revenue $ 62,716 $ 52,309 $ 168,127 $ 157,658
Net income (loss) $ 2,622 $ 670 $ (2,294) $ (1,172)