Reconciliation of Changes in Warranty Reserve (Detail) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Feb. 29, 2020 |
Feb. 28, 2019 |
|
| Warranty Liability [Line Items] | ||
| Balance at beginning of year | $ 37 | $ 127 |
| Reduction/increase in provision based on current year sales activity | 63 | (77) |
| Warranty costs incurred | (49) | (13) |
| Balance at end of year | $ 51 | $ 37 |