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Income Taxes (Income Before Provision for Income Taxes) (Details) - USD ($)
12 Months Ended
Jul. 31, 2018
Jul. 31, 2017
Jul. 31, 2016
Income Tax Disclosure [Abstract]      
U.S. $ 22,243,000 $ 23,732,000 $ (7,666,000)
Foreign 2,383,000 1,749,000 (526,000)
Income (loss) before (benefit from) provision for income taxes $ 24,626,000 $ 25,481,000 $ (8,192,000)