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Note 6 - Goodwill and Other Intangibles - Goodwill (Details) $ in Thousands | 6 Months Ended
--- | ---
Sep. 30, 2022 USD ($)
March 31, 2021 | $ 43,471
March 31, 2022 | 43,471
Grid [Member] |
March 31, 2021 | 34,634
Neeltran Acquisition | 8,837
Less impairment loss | 0
March 31, 2022 | $ 43,471

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