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Note 5 - Goodwill and Intangible Assets, Net - Other Intangible Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Mar. 31, 2020
--- | --- | ---
Carrying Amount | $ 183,110 | $ 169,123
Accumulated Amortization | (62,307) | (49,252)
Net | 120,803 | 119,871
Intellectual Property [Member] |  |
Carrying Amount | 21,909 | 15,731
Accumulated Amortization | (8,262) | (6,454)
Net | 13,647 | 9,277
Trade Names [Member] |  |
Carrying Amount | 8,875 | 5,839
Accumulated Amortization | (3,060) | (2,855)
Net | 5,815 | 2,984
Customer Relationships [Member] |  |
Carrying Amount | 151,027 | 146,106
Accumulated Amortization | (49,800) | (38,777)
Net | 101,227 | 107,329
Noncompete Agreements [Member] |  |
Carrying Amount | 1,299 | 1,447
Accumulated Amortization | (1,185) | (1,166)
Net | $ 114 | $ 281

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