Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Feb. 29, 2016	Feb. 28, 2015
Balance Sheets [Abstract]
Allowance for doubtful accounts (in dollars)	$ 2	$ 2
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	500,000	500,000
Preferred stock, shares issued
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 outstanding	2,232,977	2,185,832
Treasury stock, shares	338,257	273,230