Note 12 - Financial Income, Net (Details) - Components of Financial Income, Net - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Components of Financial Income, Net [Abstract]
Foreign exchange gains	$ 19	$ 27
Interest income from marketable securities and deposits, net of amortization of premium on marketable securities	1,391	1,391	$ 1,656
Realized gains on marketable securities	3	73	1,013
Other			13
Financial income	1,413	1,491	2,682
Realized losses on marketable securities	27	12	4
Foreign exchange losses	58	113	86
Interest expenses	12	24	29
Other	141	138	106
Financial expense	238	287	225
Financial income, net	$ 1,175	$ 1,204	$ 2,457