Note 10 - Fair Value Measurements (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Jul. 30, 2014	Jul. 22, 2014
Note 10 - Fair Value Measurements (Details) [Line Items]
Business Combination, Contingent Consideration, Liability	$ 2,507	$ 2,507
Sensima [Member]
Note 10 - Fair Value Measurements (Details) [Line Items]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High			$ 8,900	$ 8,900
Business Combination, Contingent Consideration, Liability	$ 2,507		$ 2,500	$ 2,500