Note 7 - Customer and Geographic Information - Long-lived Assets by Geographic Area (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
North America [Member]
Long-lived assets	$ 12,720	$ 10,752
Rest of the World [Member]
Long-lived assets	516	573
Long-lived assets	$ 13,236	$ 11,325