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Note 5 - Intangible Assets, Net (Tables) | 9 Months Ended
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Sep. 30, 2019
Notes Tables |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | Amortization period (in years) |  |  | September 30, 2019 |  |  | December 31, 2018 |
Gross amount: |  |  |  |  |  |  |  |  |  |  |  |
Software developed for internal use |  |  | 3 |  |  | $ | 4,427 |  |  | $ | 3,037 |
Acquired proprietary technology |  |  | 4-5 |  |  |  | 13,559 |  |  |  | 11,459 |
Customer relationships |  |  | 6-10 |  |  |  | 37,286 |  |  |  | 34,986 |
Trade names |  |  | 4-20 |  |  |  | 16,657 |  |  |  | 16,357 |
Domain names |  |  | 20 |  |  |  | 191 |  |  |  | 191 |
Databases |  |  | 5-10 |  |  |  | 31,292 |  |  |  | 31,292 |
Non-competition agreements |  |  | 2-5 |  |  |  | 1,768 |  |  |  | 1,768 |
Total gross amount |  |  |  |  |  |  | 105,180 |  |  |  | 99,090 |
Accumulated amortization: |  |  |  |  |  |  |  |  |  |  |  |
Software developed for internal use |  |  |  |  |  |  | (1,724 | ) |  |  | (1,282 | )
Acquired proprietary technology |  |  |  |  |  |  | (8,827 | ) |  |  | (6,987 | )
Customer relationships |  |  |  |  |  |  | (18,116 | ) |  |  | (14,417 | )
Trade names |  |  |  |  |  |  | (3,124 | ) |  |  | (2,504 | )
Domain names |  |  |  |  |  |  | (36 | ) |  |  | (29 | )
Databases |  |  |  |  |  |  | (13,280 | ) |  |  | (10,573 | )
Non-competition agreements |  |  |  |  |  |  | (1,595 | ) |  |  | (1,486 | )
Total accumulated amortization |  |  |  |  |  |  | (46,702 | ) |  |  | (37,278 | )
Net intangible assets: |  |  |  |  |  |  |  |  |  |  |  |
Software developed for internal use |  |  |  |  |  |  | 2,703 |  |  |  | 1,755 |
Acquired proprietary technology |  |  |  |  |  |  | 4,732 |  |  |  | 4,472 |
Customer relationships |  |  |  |  |  |  | 19,170 |  |  |  | 20,569 |
Trade names |  |  |  |  |  |  | 13,533 |  |  |  | 13,853 |
Domain names |  |  |  |  |  |  | 155 |  |  |  | 162 |
Databases |  |  |  |  |  |  | 18,012 |  |  |  | 20,719 |
Non-competition agreements |  |  |  |  |  |  | 173 |  |  |  | 282 |
Total intangible assets, net |  |  |  |  |  | $ | 58,478 |  |  | $ | 61,812 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
Year |  | September 30, 2019 |
Remainder of 2019 |  | $ | 3,443 |
2020 |  |  | 13,623 |
2021 |  |  | 10,810 |
2022 |  |  | 9,171 |
2023 |  |  | 4,663 |
2024 and thereafter |  |  | 16,768 |
Total |  | $ | 58,478 |

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