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Summary of Significant Accounting Policies - Concentration of Credit Risk and Revenue Recognition - Additional Information (Details) - Customer |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Nov. 30, 2018 | Aug. 31, 2019 | Aug. 31, 2018 | Aug. 31, 2019 | Aug. 31, 2018
Sales Revenue, Net | Customer Concentration Risk |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration Risk, Percentage |  | 21.00% | 16.00% | 19.00% | 17.00%
Number of customers accounted for 10% or more of consolidated revenue |  | 1 | 1 | 1 | 1
Sales Revenue, Net | Supplier Concentration Risk | HP Inc |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration Risk, Percentage |  | 12.00% | 13.00% | 12.00% | 13.00%
Accounts Receivable | Customer Concentration Risk |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration Risk, Percentage | 11.00% |  |  | 21.00% |
Number of customers exceeded 10 percent of total consolidated accounts receivable | 1 | 1 |  | 1 |

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