Stockholders' Equity - Per Share Results (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Nov. 30, 2015	Aug. 31, 2015	May. 31, 2015	Feb. 28, 2015	Nov. 30, 2014	Aug. 31, 2014	May. 31, 2014	Feb. 28, 2014	Nov. 30, 2015	Nov. 30, 2014	Nov. 30, 2013
Per Share Results
Income (loss) from continuing operations for computation of basic and diluted per share results, net of tax	$ 164	$ 1,203	$ (234)	$ (708)	$ 273	$ (198)	$ (225)	$ (1,098)	$ 425	$ (1,248)	$ 1,910
Income from discontinued operations for computation of basic and diluted per share results, net of tax						26	390	(272)		144	(7,731)
Net income (loss)	$ 164	$ 1,203	$ (234)	$ (708)	$ 273	$ (172)	$ 165	$ (1,370)	$ 425	$ (1,104)	$ (5,821)
Weighted average shares outstanding for computation of basic per share results									5,151,000	5,148,000	5,144,000
Incremental shares from assumed exercise of Griffin stock options									17,000		8,000
Adjusted weighted average shares for computation of diluted per share results									5,168,000	5,148,000	5,152,000
Incremental shares from assumed exercise of stock options excluded due to anti-dilutive effect										11,000