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Intangible Assets - Amortization (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Sep. 30, 2016
Future expected amortization of intangible assets    
2017 (remaining three months) $ 53  
2018 189  
2019 182  
2020 183  
2021 and thereafter 767  
Total $ 1,374 $ 2,650