Note 14 - Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Foreign currency translation adjustment	$ (3,510)	$ (5,590)	$ (1,440)
Accumulated other comprehensive loss	$ (3,510)	$ (5,590)	$ (1,440)