Consolidated Balance Sheets (Parenthetical) - $ / shares	Aug. 31, 2018	Nov. 30, 2017
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	5,615,583	5,541,029
Common stock, shares outstanding	5,045,050	5,000,535
Treasury stock, shares	570,533	540,494