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Goodwill and Intangible Assets, Net - Future Amortization Expense (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Oct. 31, 2020
Jan. 31, 2020
Jan. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]      
Amortization of Intangible Assets $ 6,759 $ 2,327  
Remainder of 2021 3,991    
2022 15,240    
2023 14,211    
2024 14,211    
2025 12,106    
Thereafter 4,400    
Total $ 64,159 $ 21,306 $ 306