Concentration of Risk - Summary of Customers Accounted for More than Five Percent of Net Sales (Details)	12 Months Ended
	Nov. 30, 2018	Nov. 30, 2017
Walmart
Concentration Risk [Line Items]
Percentage of Company's net saves accounted by customer	41.50%	36.30%
Walgreens
Concentration Risk [Line Items]
Percentage of Company's net saves accounted by customer	16.30%	13.40%
Target
Concentration Risk [Line Items]
Percentage of Company's net saves accounted by customer	10.40%	6.90%
CVS
Concentration Risk [Line Items]
Percentage of Company's net saves accounted by customer	7.30%
Foreign Sales
Concentration Risk [Line Items]
Percentage of Company's net saves accounted by customer	8.80%	12.40%