Schedule II-Valuation and Qualifying Accounts and Reserves (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2014
Uncollectible accounts - trade
Reserves:
Balance at Beginning of Year			$ 134
Charged to Cost and Expenses			(101)
Deductions From Reserves			33
Inventories
Reserves:
Balance at Beginning of Year			10,854
Deductions From Reserves			10,854
Valuation allowance on deferred tax asset
Reserves:
Balance at Beginning of Year	$ 345	$ 395	379
Charged to Cost and Expenses	180	(50)	16
Charged to Other Accounts	989
Balance at End of Year	$ 1,514	$ 345	$ 395