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Goodwill and Acquired Intangible Assets, Net - Future Amortization Expense (Details) - USD ($)
$ in Thousands
Apr. 30, 2020
Jan. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]    
Remainder of 2021 $ 6,375  
2022 8,500  
2023 8,500  
2024 7,825  
2025 1,450  
2026 0  
Net Book Value $ 32,650 $ 34,779