v3.26.1
COMMITMENTS AND CONTINGENCIES - Changes in warranty reserves (Details) - USD ($)
$ in Thousands
3 Months Ended
Jul. 31, 2026
Jul. 31, 2025
Changes in warranty reserves    
Balance at beginning of period $ 386 $ 259
Warranty issued during period 25 49
Warranty expenditures during period (1) (5)
Balance at end of period $ 410 $ 303