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Intangible Assets - Schedule of Estimated Future Amortization Expense for Intangible Assets (Details) - USD ($)
$ in Thousands
Apr. 30, 2019
Jan. 31, 2019
Goodwill And Intangible Assets Disclosure [Abstract]    
2020 - remainder of fiscal year $ 484  
2021 642  
2022 638  
2023 612  
2024 52  
Carrying Value, Intangible Assets $ 2,428 $ 2,635