Note 12 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block]

	Year Ended December 31,
	2016			2015			2014
United States	$	(14,431	)	$	(247	)	$	3,173
International		71,695			42,738			33,219
Total income before income taxes	$	57,264		$	42,491		$	36,392

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	Year Ended December 31,
	2016		2015		2014
Current:
Federal	$	2,527	$	6,042	$	18
State		-		2		(28	)
Foreign		2,013		1,213		943
Deferred:
Foreign		4		62		(36	)
Total income tax provision	$	4,544	$	7,319	$	897

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	Year Ended December 31,
	2016			2015			2014
U.S. statutory federal tax rate		34.0	%		34.0	%		34.0	%
Settlement with tax authorities		-			6.2			-
Foreign income at lower rates		(41.1	)		(43.1	)		(27.7	)
Changes in valuation allowance		11.0			17.6			5.9
Stock-based compensation		2.2			-			(9.3	)
Reserves and other		1.8			2.5			(0.4	)
Effective tax rate		7.9	%		17.2	%		2.5	%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	December 31,
	2016			2015
Deferred tax assets:
Research tax credits	$	9,817		$	8,869
Deferred compensation		6,752			5,038
Stock-based compensation		7,283			1,912
Other expenses not currently deductible		3,974			3,519
Depreciation and amortization		161			(52	)
Total deferred tax assets		27,987			19,286
Valuation allowance		(27,354	)		(18,614	)
Net deferred tax assets	$	633		$	672

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

Balance as at January 1, 2014	$	14,922
Increase for tax position of prior year		584
Increase for tax position of current year		1,760
Decrease due to lapse of statue of limitation		(860	)
Balance as of December 31, 2014		16,406
Increase for tax position of current year		1,964
Decrease related to settlement with tax authorities		(4,162	)
Decrease due to lapse of statue of limitation		(669	)
Decrease for tax position of prior year		(1,446	)
Balance as of December 31, 2015		12,093
Increase for tax position of prior year		243
Increase for tax position of current year		2,095
Balance as of December 31, 2016	$	14,431