Stockholders' Equity - Per Share Results (Details) - USD ($) $ in Thousands	3 Months Ended
Feb. 29, 2020	Feb. 28, 2019
Earnings per share:
Net loss	$ (320)	$ (586)
Weighted average shares outstanding for computation of basic per share results	5,075,000	5,065,000
Adjusted weighted average shares for computation of diluted per share results	5,075,000	5,065,000
Incremental shares from assumed exercise of stock options excluded due to anti-dilutive effect	54,000	21,000

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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