Note 2 - Fair Value Measurement - Changes in the Fair Value of the Company's Level 3 Financial Liabilities (Details) $ in Thousands	6 Months Ended
Jun. 30, 2017 USD ($)
Balance – December 31, 2016	$ 3,475
Change in fair value of contingent purchase price consideration	(2,595)
Balance – June 30, 2017	$ 880

Amount of increase (decrease) of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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