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Note 13 - Fair Value Measurements - Rollforward of the Fair Value as Determined by Level 3 (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Beginning balance $ 72 $ 1,300
Additions
Payments (33) (35)
Change in fair value included in earnings (13) 30
Ending balance $ 26 $ 1,295