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Description of Business and Summary of Significant Accounting Policies (Details 2) - USD ($) $ in Thousands | 12 Months Ended
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Jul. 31, 2018 | Jul. 31, 2017 | Jul. 31, 2016
Reserves deducted from accounts receivable: |  |  |  |  |  |
Allowance for doubtful accounts, Balance at beginning of year |  | $ 5,207 | [1] | $ 4,818 | [1] | $ 5,645
Allowance for doubtful accounts, Additions charged to costs and expenses |  | 2,199 | [1] | 686 | [1] | 1,519
Allowance for doubtful accounts, Deductions | [2] | (2,048) | [1] | (297) | [1] | (2,346)
Allowance for doubtful accounts, Balance at end of year | [1] | $ 5,358 |  | $ 5,207 |  | $ 4,818
[1] | Includes allowance for doubtful accounts of $2.2 million and $2.6 million held for sale at July 31, 2018 and 2017, respectively (see Note 3)
[2] | Primarily uncollectible accounts written off, net of recoveries.

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- Definition Reserves deducted from accounts receivable. + References No definition available. + Details
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