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Note 6 - Goodwill and Other Acquired Intangible Assets, Net (Tables) | 9 Months Ended
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Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill [Table Text Block] | The following table shows the changes in the carrying amount of goodwill for the year-to-date periods ended December 31, 2018 and September 30, 2019:
(In thousands) | Goodwill |  | Accumulated Impairment Losses |  | Net
Balance at December 31, 2017 | $ | 197,391 |  |  | $ | (186,469 | ) |  | $ | 10,922 |
Goodwill acquired | 3,170 |  |  | — |  |  | 3,170 |
Balance at December 31, 2018 | 200,561 |  |  | (186,469 | ) |  | 14,092 |
Goodwill acquired | 538 |  |  | — |  |  | 538 |
Balance at September 30, 2019 | $ | 201,099 |  |  | $ | (186,469 | ) |  | $ | 14,630 |
Schedule of Other Intangible Assets [Table Text Block] | The following is a summary of the gross and net carrying amounts and accumulated amortization of our other acquired intangible assets as of the periods indicated:
| September 30, 2019
(In thousands) | Original Amount Acquired |  | Accumulated Amortization and Impairment |  | Net Carrying Amount
Client relationships | $ | 83,860 |  |  | $ | (52,764 | ) |  | $ | 31,096 |
Technology | 16,964 |  |  | (14,382 | ) |  | 2,582 |
Trade name and trademarks | 8,340 |  |  | (4,511 | ) |  | 3,829 |
Non-competition agreements | 185 |  |  | (183 | ) |  | 2 |
Licenses | 463 |  |  | (69 | ) |  | 394 |
Total | $ | 109,812 |  |  | $ | (71,909 | ) |  | $ | 37,903 |
| December 31, 2018
(In thousands) | Original Amount Acquired |  | Accumulated Amortization and Impairment |  | Net Carrying Amount
Client relationships | $ | 84,000 |  |  | $ | (48,227 | ) |  | $ | 35,773 |
Technology | 17,362 |  |  | (13,141 | ) |  | 4,221 |
Trade name and trademarks | 8,340 |  |  | (3,864 | ) |  | 4,476 |
Non-competition agreements | 185 |  |  | (177 | ) |  | 8 |
Licenses | 463 |  |  | (35 | ) |  | 428 |
Total | $ | 110,350 |  |  | $ | (65,444 | ) |  | $ | 44,906 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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