Supplemental Financial Statement Information - AFS Securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2017	Nov. 30, 2016	Nov. 30, 2015
Investments
Shares of common stock held in Centaur Media	1,952,462,000	1,952,462
Shares of Centaur Media common stock sold	1,952,462
Proceeds from sale of shares	$ 1,216
Gain on sale of common stock of Centaur Media plc	275
Dividend income	$ 38	$ 79	$ 83
Investment in Centaur Media
Fair Value		977
Cost		1,014
Unrealized (loss)		$ (37)