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Description of Business and Summary of Significant Accounting Policies (Tables)
 6 Months Ended
Jan. 31, 2019
Accounting Policies [Abstract]  
Contract with Customer, Asset and Liability [Table Text Block] The change in the carrying amount of contract assets was as follows (in thousands):
Balance as of July 31, 2018
 
$
11,840

Costs amortized during the period
 
(3,322
)
Effect of foreign currency exchange rates
 
(46
)
Balance as of January 31, 2019
 
$
8,472
Schedule of foreign currency translation The cumulative effects of foreign currency exchange rate fluctuations were as follows (in thousands):
Cumulative loss on foreign currency translation as of July 31, 2017
 
$
(100,676
)
Loss on foreign currency translation
 
(7,252
)
Cumulative loss on foreign currency translation as of July 31, 2018
 
$
(107,928
)
Gain on foreign currency translation
 
705

Cumulative loss on foreign currency translation as of January 31, 2019
 
$
(107,223
)