Note 11 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Income Tax Disclosure [Abstract]

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

	Year Ended December 31,
	2015			2014		2013
United States	$	(247	)	$	3,173	$	(2,309	)
International		42,738			33,219		26,316
Total income before income taxes	$	42,491		$	36,392	$	24,007

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

	Year Ended December 31,
	2015		2014			2013
Current:
Federal	$	6,042	$	18		$	77
State		2		(28	)		67
Foreign		1,213		943			1,053
Deferred:
Foreign		62		(36	)		(88	)
Total income tax provision	$	7,319	$	897		$	1,109

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

	Year Ended December 31,
	2015			2014			2013
U.S. statutory federal tax rate		34.0	%		34.0	%		34.0	%
Settlement with tax authorities		6.2			-			-
Foreign income at lower rates		(43.1	)		(27.7	)		(33.8	)
Changes in valuation allowance		17.6			5.9			16.8
Stock-based compensation		-			(9.3	)		(13.7	)
Reserves and other		2.5			(0.4	)		1.3
Effective tax rate		17.2	%		2.5	%		4.6	%

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

	December 31,
	2015			2014
Deferred tax assets:
Research tax credits	$	8,869		$	10,393
Deferred compensation		5,038			2,326
Other expenses not currently deductible		3,519			2,535
Stock-based compensation		1,912			4,068
Net operating losses		-			298
Depreciation and amortization		(52	)		181
Total deferred tax assets		19,286			19,801
Valuation allowance		(18,614	)		(19,051	)
Net deferred tax assets	$	672		$	750

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

Balance as at January 1, 2013	$	13,081
Increases for tax position of prior year		646
Increases for tax position of current year		1,528
Decreases due to lapse of statue of limitations		(333	)
Balance as of December 31, 2013		14,922
Increases for tax position of prior year		584
Increases for tax position of current year		1,760
Decreases due to lapse of statue of limitations		(860	)
Balance as of December 31, 2014		16,406
Increases for tax position of current year		1,964
Decreases related to settlement with tax authorities		(4,162	)
Decreases due to lapse of statue of limitations		(669	)
Decreases for tax position of prior year		(1,446	)
Balance as of December 31, 2015	$	12,093