Note 14 - Accumulated Other Comprehensive Income (Details) - Reclassifications Out of Accumulated Other Comprehensive Income - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Financial income, net		$ 245	$ 186	$ 871	$ 895
Total, net of income taxes		167	773	1,670	873
Gains on cash flow hedges
Research and development	[1]	8,709	8,083	26,680	24,313
Sales and marketing	[2]	3,071	2,892	9,108	8,925
General and administrative	[3]	2,409	2,580	7,390	7,941
Total, before income taxes		308	$ 762	2,073	$ 848
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Total, net of income taxes		1		661
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Financial income, net				26
Total, net of income taxes				26
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Total, net of income taxes		(4)		620
Gains on cash flow hedges
Research and development		(3)		487
Sales and marketing				48
General and administrative		(1)		85
Total, before income taxes		(4)		620
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Total, net of income taxes		5		15
Gains on cash flow hedges
Research and development		3		9
Sales and marketing		2		6
Total, before income taxes		$ 5		$ 15

[1] Includes equity-based compensation expense in the amount of $546 and $568 for the three months ended September 30, 2015 and 2014, respectively; and $1,697 and $1,869 for the nine months ended September 30, 2015 and 2014, respectively.

[2] Includes equity-based compensation expense in the amount of $161 and $150 for the three months ended September 30, 2015 and 2014, respectively; and $491 and $481 for the nine months ended September 30, 2015 and 2014, respectively.

[3] Includes equity-based compensation expense in the amount of $479 and $507 for the three months ended September 30, 2015 and 2014, respectively; and $1,509 and $1,613 for the nine months ended September 30, 2015 and 2014, respectively.