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Acquired Intangible Assets and Goodwill - Schedule of Estimated Future Amortization Expense for Intangible Assets (Details) - USD ($)
$ in Thousands
Jul. 31, 2019
Jan. 31, 2019
Goodwill And Intangible Assets Disclosure [Abstract]    
2020 - remainder of fiscal year $ 766  
2021 1,530  
2022 1,527  
2023 1,500  
2024 940  
2025 and thereafter 1,963  
Carrying Value, Intangible Assets $ 8,226 $ 2,635