Annual report pursuant to Section 13 and 15(d)

Income taxes - Schedule of Net Deferred Tax Position (Details)

v3.10.0.1
Income taxes - Schedule of Net Deferred Tax Position (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Sep. 30, 2017
Income Tax Disclosure [Abstract]    
Balance of tax jurisdictions with net deferred tax assets $ 6,834 $ 7,691
Balance of tax jurisdictions with net deferred tax liabilities (26,377) (20,106)
Net deferred tax liabilities $ (19,543) $ (12,415)