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Note 4 - Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Sep. 30, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Oct. 01, 2019 | Jan. 01, 2018
Goodwill, gross | $ 21,993 | $ 148,260 | $ 148,260 | $ 21,993 | $ 148,408 | $ 10,778 | $ 148,768
Accumulated impairment charges |  | (137,482) | (137,482) |  | (128,591) |  | (128,591)
Goodwill | 21,993 | 10,778 | 10,778 | 21,993 | 19,817 | 10,778 | 20,177
Goodwill allocation related to acquisition | 10,287 |  |  |  | 1,290 |  |
Foreign currency translation | 928 |  | (122) |  | (1,650) |  |
Impairment charge |  |  | (8,891) | 0 | 0 |  |
Measurement period adjustment |  |  | (26) |  |  |  |
Goodwill, gross (reallocation) | 21,993 | 148,260 | 148,260 | 21,993 | 148,408 | 10,778 | 148,768
Cinch Connectivity Solutions Segment [Member] |  |  |  |  |  |  |
Goodwill, gross | 7,179 |  |  | 7,179 |  | 6,467 |
Goodwill | 7,179 |  |  | 7,179 |  | 6,467 |
Goodwill allocation related to acquisition |  |  |  |  |  |  |
Foreign currency translation | 712 |  |  |  |  |  |
Goodwill, gross (reallocation) | 7,179 |  |  | 7,179 |  | 6,467 |
Power Solutions and Protection Segment [Member] |  |  |  |  |  |  |
Goodwill, gross | 14,814 |  |  | 14,814 |  | 4,311 |
Goodwill | 14,814 |  |  | 14,814 |  | 4,311 |
Goodwill allocation related to acquisition | 10,287 |  |  |  |  |  |
Foreign currency translation | 216 |  |  |  |  |  |
Goodwill, gross (reallocation) | 14,814 |  |  | 14,814 |  | 4,311 |
Magnetic Solutions Segment [Member] |  |  |  |  |  |  |
Goodwill, gross |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |
Goodwill allocation related to acquisition |  |  |  |  |  |  |
Foreign currency translation |  |  |  |  |  |  |
Goodwill, gross (reallocation) |  |  |  |  |  |  |
North America [Member] |  |  |  |  |  |  |
Goodwill, gross |  | 63,364 | 63,364 |  | 63,364 |  | 63,364
Accumulated impairment charges |  | (63,364) | (63,364) |  | (54,473) |  | (54,474)
Goodwill |  |  |  |  | 8,891 |  | 8,890
Goodwill allocation related to acquisition |  |  |  |  |  |  |
Foreign currency translation |  |  |  |  |  |  |
Impairment charge |  | (8,900) | (8,891) |  |  |  |
Measurement period adjustment |  |  |  |  |  |  |
Goodwill, gross (reallocation) |  | 63,364 | 63,364 |  | 63,364 |  | 63,364
Asia [Member] |  |  |  |  |  |  |
Goodwill, gross |  | 54,508 | 54,508 |  | 54,508 |  | 54,508
Accumulated impairment charges |  | (54,508) | (54,508) |  | (54,508) |  | (54,508)
Goodwill |  |  |  |  |  |  |
Goodwill allocation related to acquisition |  |  |  |  |  |  |
Foreign currency translation |  |  |  |  |  |  |
Impairment charge |  |  |  |  |  |  |
Measurement period adjustment |  |  |  |  |  |  |
Goodwill, gross (reallocation) |  | 54,508 | 54,508 |  | 54,508 |  | 54,508
Europe [Member] |  |  |  |  |  |  |
Goodwill, gross |  | 30,388 | 30,388 |  | 30,536 |  | 30,896
Accumulated impairment charges |  | (19,610) | (19,610) |  | (19,610) |  | (19,609)
Goodwill |  | 10,778 | 10,778 |  | 10,926 |  | 11,287
Goodwill allocation related to acquisition |  |  |  |  | 1,290 |  |
Foreign currency translation |  |  | (122) |  | (1,650) |  |
Impairment charge | $ 0 |  |  |  |  |  |
Measurement period adjustment |  |  | (26) |  |  |  |
Goodwill, gross (reallocation) |  | $ 30,388 | $ 30,388 |  | $ 30,536 |  | $ 30,896

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