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Note 4 - Acquisition (Tables) | 12 Months Ended
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Dec. 31, 2019
Notes Tables |
Schedule of Business Acquisitions, by Acquisition [Table Text Block] |
|  | Year Ended December 31, 2018
|  | (in thousands, unaudited)
Pro Forma |  |  |  |
Revenues |  | $ | 124,319 |
Income from continuing operations |  |  | 3,614 |

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