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Note 2 - Fair Value Measurement - Changes in the Fair Value of the Company's Level 3 Financial Liabilities (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Balance $ 1,293 $ 1,218
Immunetics acquisition (Note 17) 3,444  
Change in fair value of contingent purchase price consideration 244 202
Write-off of Boulder contingent purchase price consideration (1,452)  
Foreign currency adjustment (54) (127)
Balance $ 3,475 $ 1,293