Supplemental Financial Statement Information - Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2014	Nov. 30, 2013
Investments
Dividend income	$ 79	$ 83	$ 82
Shares of common stock held in Centaur Media	1,952,462			2,452,462
Shares of Centaur Media common stock sold			500,000
Proceeds from sale of shares			$ 566
Gain on sale of common stock in Centaur Media plc			$ 318
Investment in Centaur Media
Fair value	$ 977	1,970
Cost	1,014	1,014
Unrealized (loss)	$ (37)
Unrealized gain		$ 956