Concentration of Risk - Summary of Customers Accounted for More than Five Percent of Net Sales (Details)	12 Months Ended
	Nov. 30, 2017	Nov. 30, 2016	Nov. 30, 2015
Walmart
Concentration Risk [Line Items]
Percentage of Company's net saves accounted by customer	36.30%	38.70%	34.60%
Walgreens
Concentration Risk [Line Items]
Percentage of Company's net saves accounted by customer	13.40%	10.50%	13.40%
Target
Concentration Risk [Line Items]
Percentage of Company's net saves accounted by customer	6.90%	8.60%	7.20%
CVS
Concentration Risk [Line Items]
Percentage of Company's net saves accounted by customer			5.70%
Foreign Sales
Concentration Risk [Line Items]
Percentage of Company's net saves accounted by customer	12.40%	11.30%	13.20%