Schedule II-Valuation and Qualifying Accounts and Reserves (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2018	Nov. 30, 2017	Nov. 30, 2016
Uncollectible accounts - trade
Reserves:
Charged to Cost and Expenses	$ 84
Balance at End of Year	84
Valuation allowance on deferred tax asset
Reserves:
Balance at Beginning of Year	1,363	$ 1,514	$ 345
Charged to Cost and Expenses	827	(151)	180
Charged to Other Accounts			989
Balance at End of Year	$ 2,190	$ 1,363	$ 1,514