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Note 15 - Financial Instruments - Change in Fair Value of Contingent Consideration Liability (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability $ (122) $ (579)
Balance, December 31, 2016 10,442  
Less: current portion 2,882 2,206
Non-current portion 7,560 1,110
Fair Value, Inputs, Level 3 [Member]    
Balance, December 31, 2015 3,316  
Amounts recognized on acquisitions 9,998  
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability (621) (54)
Resolved and settled in cash (2,490)  
Other 239  
Balance, December 31, 2016 10,442 $ 3,316
Less: current portion 2,882  
Non-current portion $ 7,560