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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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