Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)	Nov. 30, 2020	Feb. 29, 2020
Accounts receivable, allowance for doubtful accounts	$ 1,752,900	$ 638,907
Notes receivable, current portion of the valuation allowance	55,751	0
Notes receivable, noncurrent portion of valuation allowance	$ 67,743	$ 0
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)	6,070,925	6,019,532
Common stock, shares outstanding (in shares)	6,070,925	6,019,532
Series A Preferred Stock [Member]
Preferred stock, shares authorized (in shares)	50,000	50,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Undesignated Series [Member]
Preferred stock, shares authorized (in shares)	200,000	200,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0