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 |