Note 8 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2013

Income Tax Disclosure [Abstract]

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

	Year Ended December 31,
	2013			2012		2011
United States	$	(2,309	)	$	807	$	(2,031	)
International		26,316			17,083		15,757
Total income before income taxes	$	24,007		$	17,890	$	13,726

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

	Year Ended December 31,
	2013			2012			2011
Current:
Federal	$	77		$	840		$	447
State		67			3			(593	)
Foreign		1,053			1,302			992
Deferred:
Foreign		(88	)		(11	)		(421	)
Total income tax provision	$	1,109		$	2,134		$	425

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

	Year Ended December 31,
	2013			2012			2011
U.S. statutory federal tax rate		34.0	%		34.0	%		34.0	%
State, net of federal benefit		0.3			-			-
Research and development credits		-			(3.6	)		(0.5	)
Stock-based compensation		(13.7	)		0.1			5.6
Foreign income at lower rates		(33.8	)		(28.4	)		(31.8	)
Changes in valuation allowance		16.8			7.0			(6.1	)
Litigation reserves and other		1.0			2.8			1.9
Effective tax rate		4.6	%		11.9	%		3.1	%

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

	As of December 31,
	2013			2012
Deferred tax assets:
Research tax credits	$	8,303		$	4,930
Other expenses not currently deductible		3,204			2,133
Stock-based compensation		2,599			5,487
Litigation settlement		2,490			-
Net operating losses		627			291
Depreciation and amortization		291			317
Total deferred tax assets		17,514			13,158
Valuation allowance		(16,739	)		(12,488	)
Net deferred tax assets	$	775		$	670

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

Balance as at January 1, 2011	$	9,106
Gross increase for tax position of prior year		1,710
Gross increase for tax position of current year		1,388
Balance as at December 31, 2011		12,204
Gross increase for tax position of prior year		188
Gross increase for tax position of current year		689
Balance as of December 31, 2012		13,081
Gross increase for tax position of prior year		646
Gross increase for tax position of current year		1,528
Reduction for prior year tax position		(333	)
Balance as of December 31, 2013	$	14,922