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Acquisition of Versature Corp (Details 1) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Apr. 30, 2019 | Apr. 30, 2018 | Apr. 30, 2019 | Apr. 30, 2018
Acquisition of Versature Corp [Abstract] |  |  |  |
Revenues | $ 341,255 | $ 367,088 | $ 1,053,928 | $ 1,159,372
Net income (loss) | $ 4,157 | $ (3,236) | $ 3,289 | $ (3,555)

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