Note 11 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

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

	Year Ended December 31,
	2019			2018
	(In thousands)
U.S.
Current	$	(107	)	$	(84	)
Deferred		(4,534	)		(4,171	)
Foreign
Current		312			347
Withholding		2,385			2,165
Deferred		2			—
Total income tax benefit	$	(1,942	)	$	(1,743	)

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

	Year Ended December 31,
	2019			2018
Federal statutory tax provision	$	(1,546	)	$	(1,986	)
State tax provision		(85	)		(133	)
Stock compensation expense		234			768
Tax credits		(2,974	)		(2,682	)
Foreign tax, net		2,430			2,104
Other		(1	)		186
Total income tax benefit	$	(1,942	)	$	(1,743	)

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

	December 31,
	2019			2018
Deferred tax assets
Net operating loss carry forward	$	4,596		$	2,720
Research and development and other credit carry forward		18,944			17,750
Foreign tax credit carry forward		6,443			3,994
Accruals deductible in different periods		1,968			2,198
Leases		1,850			—
Intangible assets		741			1,081
Stock-based compensation		1,271			1,109
Total deferred tax assets		35,813			28,852
Less: valuation allowance		(10,486	)		(9,808	)
Deferred tax assets, net of valuation allowance	$	25,327		$	19,044
Deferred tax liabilities
Property and equipment, net		(611	)		(710	)
Operating lease right-of-use assets		(1,850	)		—
Deferred tax liabilities	$	(2,461	)	$	(710	)
Net deferred tax assets	$	22,866		$	18,334

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

	Amount
Gross unrecognized tax benefits, January 1, 2018	$	12,889
Increases in tax positions for current year		664
Increases in tax positions for prior years		—
Lapse in statute of limitations		(261	)
Gross unrecognized tax benefits, December 31, 2018		13,292
Increases in tax positions for current year		667
Increases in tax positions for prior years		1
Lapse in statute of limitations		(345	)
Gross unrecognized tax benefits, December 31, 2019	$	13,615

SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]

Notes Tables

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
2019	$	9,808	$	678	$	—	$	10,486
2018	$	9,126	$	682	$	—	$	9,808