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Balance Sheet Components (Details 6) - USD ($)
$ in Thousands
Apr. 30, 2020
Jul. 31, 2019
Balance Sheet Related Disclosures [Abstract]    
2020 (remainder of fiscal year) $ 6,324  
2021 19,965  
2022 11,143  
2023 3,799  
2024 2,379  
Thereafter 2,421  
Net Book Value $ 46,031 $ 66,542