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Note 15 - Commitments and Contingencies (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2018
Notes Tables |
Lessee, Operating Lease, Disclosure [Table Text Block] |
|  | Minimum Rental
|  | (In thousands)
Years ended December 31: |  |  |  |
2019 |  | $ | 7,605 |
2020 |  |  | 7,977 |
2021 |  |  | 7,214 |
2022 |  |  | 6,822 |
2023 |  |  | 6,961 |
Thereafter |  |  | 23,655 |
Total minimum payments required |  | $ | 60,234 |

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