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Intangible Assets, Net - Schedule of future amortization expense of intangible assets (Details)
$ in Thousands
Sep. 30, 2019
USD ($)
Intangible Assets, Net (Excluding Goodwill) [Abstract]  
Remainder of 2019 $ 264
2020 792
2021 792
2022 792
2023 792
Thereafter 5,812
Total $ 9,244