Note 10 - Financial Expenses, Net - Summary of Financial Income and Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Interest on bank deposits, net	$ 747	$ 520	$ 330
Foreign currency transactions gains, net	1,773
Other	27
Financial Income	2,547	520	330
Bank charges	185	149	95
Foreign currency transactions losses, net		1,224	1,711
Other		32	47
Financial expenses	(185)	(1,405)	(1,853)
Total	$ 2,362	$ (885)	$ (1,523)