Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)	May 31, 2022	Feb. 28, 2022
Accounts receivable, allowance for doubtful accounts	$ 819,183	$ 870,735
Notes receivable, current portion of the valuation allowance	$ 33,784	$ 47,228
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	250,000	250,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	46,000,000	46,000,000
Common stock, shares issued (in shares)	6,213,681	6,186,356
Common stock, shares outstanding (in shares)	6,213,681	6,186,356