Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)	May 31, 2018	Feb. 28, 2018
Statement of Financial Position [Abstract]
Allowance for doubtful accounts receivable	$ 46,000	$ 46,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized	25,000,000	25,000,000
Common stock, issued shares	14,989,003	14,986,367
Common stock, outstanding shares	14,989,003	14,986,367