Note 6 - Fair Value Measurements (Details Textual) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings | $ (4,171) | $ (6,682) | $ (4,922) |
| Comtrafo Industria de Transformadores Eletricos S.A. (Comtrafo) [Member] | |||
| Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings | $ (4,200) | ||