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Note 6 - Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2018
Notes Tables |
Schedule of Goodwill [Table Text Block] |
(in thousands) |  | Dec. 31, 2016 |  |  | Goodwill acquired during 2017 |  |  | Dec. 31, 2017 |  |  | Goodwill acquired during 2018 |  |  | Dec. 31, 2018 |
United States |  | $ | 24,047 |  |  | $ | 99,588 |  |  | $ | 123,635 |  |  | $ | 248 |  |  | $ | 123,883 |
Europe |  |  | 4,239 |  |  |  | - |  |  |  | 4,239 |  |  |  | - |  |  |  | 4,239 |
Japan |  |  | 630 |  |  |  | - |  |  |  | 630 |  |  |  | - |  |  |  | 630 |
Total goodwill |  | $ | 28,916 |  |  | $ | 99,588 |  |  | $ | 128,504 |  |  | $ | 248 |  |  | $ | 128,752 |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | Year Ended December 31, 2018 |  |  | Year Ended December 31, 2017 |  |  |  |  |  | Weighted Average Useful Life |
(in thousands) |  | Gross |  |  | Accumulated Amortization |  |  | Net |  |  | Gross |  |  | Accumulated Amortization |  |  | Net |  |  | Useful Life (in years) |  |  | Remaining (in years) |
Intangible Assets with finite lives: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Marketing assets |  | $ | 930 |  |  | $ | (434 | ) |  | $ | 496 |  |  | $ | 930 |  |  | $ | (341 | ) |  | $ | 589 |  |  | 10.0 |  |  | 5.3 |
Non-compete agreement |  |  | 270 |  |  |  | (206 | ) |  |  | 64 |  |  |  | 270 |  |  |  | (190 | ) |  |  | 80 |  |  | 2.0 - 5.0 |  |  | 4.0 |
Trade secrets |  |  | 250 |  |  |  | (233 | ) |  |  | 17 |  |  |  | 250 |  |  |  | (183 | ) |  |  | 67 |  |  | 5.0 |  |  | 0.3 |
Trade names |  |  | 1,080 |  |  |  | (540 | ) |  |  | 540 |  |  |  | 1,080 |  |  |  | - |  |  |  | 1,080 |  |  | 2.0 |  |  | 1.0 |
Software technology |  |  | 12,229 |  |  |  | (997 | ) |  |  | 11,232 |  |  |  | 8,229 |  |  |  | - |  |  |  | 8,229 |  |  | 10.0 |  |  | 9.0 |
Customer relationships |  |  | 10,070 |  |  |  | (2,569 | ) |  |  | 7,501 |  |  |  | 10,070 |  |  |  | (1,031 | ) |  |  | 9,039 |  |  | 6.0 - 9.0 |  |  | 4.8 |
Total intangible assets |  | $ | 24,829 |  |  | $ | (4,979 | ) |  | $ | 19,850 |  |  | $ | 20,829 |  |  | $ | (1,745 | ) |  | $ | 19,084 |  |  |  |  |  |  |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
(in thousands) |  | Estimated Amortization Expense |
2019 |  | $ | 3,451 |
2020 |  |  | 2,895 |
2021 |  |  | 2,895 |
2022 |  |  | 2,895 |
2023 |  |  | 2,691 |
Thereafter |  |  | 5,023 |
Total estimated amortization expense |  | $ | 19,850 |

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