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Balance Sheet Components (Details 4) - USD ($)
$ in Thousands
Apr. 30, 2017
Jul. 31, 2016
Balance Sheet Related Disclosures [Abstract]    
2017 (remainder of fiscal year) $ 4,776  
2018 18,782  
2019 17,542  
2020 16,464  
2021 9,995  
Thereafter 8,532  
Net Book Value $ 76,091 $ 14,204