Note 3 - Acquisition (Details) - Fair Value of Purchase Consideration - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014	Jul. 30, 2014	Jul. 22, 2014
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration	$ 2,507	$ 2,507
Sensima [Member]
Business Acquisition, Contingent Consideration [Line Items]
Cash paid at the Acquisition Date	11,735
Contingent consideration	2,507		$ 2,500	$ 2,500
Total	$ 14,242