Consolidated Balance Sheets (Parenthetical) - $ / shares	Nov. 30, 2017	Nov. 30, 2016
Consolidated Balance Sheets
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares issued	5,541,029	5,541,029
Common stock, shares outstanding	5,000,535	5,047,708
Treasury stock, shares	540,494	493,321