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Note 6 - Goodwill and Other Intangibles - Intangible Assets (Details) - USD ($)
$ in Thousands
9 Months Ended
Dec. 31, 2021
Mar. 31, 2021
Accumulated Amortization $ (6,096) $ (4,117)
Net Book Value 10,155  
Intangible assets, gross amount 18,051 13,270
Intangible assets, net 11,955 9,153
Trade Names [Member]    
Trade name 1,800 600
Backlog [Member]    
Gross Amount 681 600
Accumulated Amortization (614) (475)
Net Book Value $ 67 125
Estimated Useful Life (Year) 2 years  
Customer Relationships [Member]    
Gross Amount $ 9,600 6,100
Accumulated Amortization (2,217) (739)
Net Book Value $ 7,383 5,361
Estimated Useful Life (Year) 7 years  
Core Technology and Know-how [Member]    
Gross Amount $ 5,970 5,970
Accumulated Amortization (3,265) (2,903)
Net Book Value $ 2,705 $ 3,067
Core Technology and Know-how [Member] | Minimum [Member]    
Estimated Useful Life (Year) 5 years  
Core Technology and Know-how [Member] | Maximum [Member]    
Estimated Useful Life (Year) 10 years