Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Feb. 28, 2018	Feb. 28, 2017
Accounts receivable, allowance for bad debts	$ 19	$ 20
Preferred stock, par value
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	9,732,000	9,732,000
Common stock, shares outstanding	5,887,000	5,891,000
Treasury stock, shares	3,845,000	3,841,000