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Note 8 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2014

Note 8 - Income Taxes (Tables) [Line Items]

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

		Year Ended December 31,
		2014				2013				2012
		(In thousands)
U.S.
Current		$	3,032			$	719			$	271
Deferred			2,882				5,432				(19,863	)
Foreign
Current			476				291				512
Withholding			3,103				3,830				948
Deferred			4				108				(197	)
Total provision (benefit)		$	9,497			$	10,380			$	(18,329	)

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

		Year Ended December 31,
		2014				2013				2012
Federal statutory tax provision		$	9,786			$	10,958			$	6,609
State tax provision (benefit)			56				581				(925	)
Stock compensation expense			540				393				644
Tax credits			(3,924	)			(5,424	)			(722	)
Foreign tax, net			3,170				3,884				906
Change in valuation allowance			—				—				(25,223	)
Other			(131	)			(12	)			382
Tax provision (benefit)		$	9,497			$	10,380			$	(18,329	)

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

		December 31,
		2014				2013
Deferred tax Assets
Net operating loss carry forward		$	533			$	621
Research and development and other credit carry forward			5,438				6,938
Foreign tax credit carry forward			1				—
Accruals deductible in different periods			3,021				3,931
Intangible assets			5,555				6,105
Stock-based compensation			2,861				2,491
Valuation allowance			(5,433	)			(5,087	)
Subtotal		$	11,976			$	14,999
Deferred tax liabilities
Fixed assets			(632	)			(478	)
Net Deferred tax assets		$	11,344			$	14,521

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

		Amount
Gross unrecognized tax benefits, January 1, 2012		$	9,644
Increases in tax positions for current year			616
Increase in tax positions for prior years			—
Lapse in statute of limitations			(707	)
Gross unrecognized tax benefits, December 31, 2012			9,553
Increases in tax positions for current year			1,052
Increases in tax positions for prior years			—
Lapse in statute of limitations			(389	)
Gross unrecognized tax benefits, December 31, 2013			10,216
Increases in tax positions for current year			809
Increases in tax positions for prior years			—
Lapse in statute of limitations			(597	)
Gross unrecognized tax benefits, December 31, 2014		$	10,428

Valuation Allowance of Deferred Tax Assets [Member]

Note 8 - Income Taxes (Tables) [Line Items]

Summary of Valuation Allowance [Table Text Block]

		Balance at Beginning of Period				Charged to Costs and Expenses				Deductions/ Write-offs of Accounts				Balance at End of Period
Valuation allowance for deferred tax assets
2014		$	5,087			$	346			$	—			$	5,433
2013			4,708				379				—				5,087
2012			30,731				—				(26,023	)			4,708

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