Note 10 - Stockholders' Equity - Restricted Stock Unit Awards Outstanding Under the Plans (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares
9 Months Ended
Nov. 30, 2021
Nov. 30, 2020
Outstanding non-vested restricted stock units as of February 28 or 29: (in shares) 209,450 265,555
Granted (in shares) 26,058 0
Vested (in shares) (117,470) (51,393)
Cancelled/forfeited (in shares) (2,400) (1,344)
Outstanding non-vested restricted stock units as of November 30: (in shares) 115,638 212,818
Weighted average grant date fair value (in dollars per share) $ 9.23 $ 9.40
Weighted average remaining vesting period (Year) 2 years 4 months 24 days 3 years 11 months 1 day