Stockholders' Equity - Per Share Results (Details) - USD ($) $ in Thousands	3 Months Ended
	Feb. 28, 2019	Feb. 28, 2018
Earnings per share:
Net loss	$ (586)	$ (1,723)
Weighted average shares outstanding for computation of basic per share results	5,065,000	5,001,000
Adjusted weighted average shares for computation of diluted per share results	5,065,000	5,001,000
Incremental shares from assumed exercise of stock options excluded due to anti-dilutive effect	21,000	39,000