Note 9 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

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

	Year ended December 31,
	2017			2016			2015
Domestic	$	(18,234	)	$	(16,898	)	$	(20,098	)
Foreign		6,999			319			(499	)
	$	(11,235	)	$	(16,579	)	$	(20,597	)

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

	Year ended December 31,
	2017			2016		2015
Current:
Domestic:
Federal	$	(92	)	$	92	$	—
State		191			109		85
Foreign		2,516			930		601
Total current income tax	$	2,615		$	1,131	$	686
Deferred:
Foreign	$	(156	)	$	—	$	—
Total deferred income tax	$	(156	)	$	—	$	—
Income tax expense	$	2,459		$	1,131	$	686

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

	December 31,
	2017			2016
Carry forward losses and credits	$	7,407		$	6,294
Deferred revenues		14,226			16,774
Accrued payroll, commissions, vacation		1,105			2,078
Allowance for doubtful accounts		633			43
Accrued severance pay		239			372
Other		2,668			2,939
Net deferred tax assets before valuation allowance		26,278			28,500
Valuation allowance		(26,122	)		(28,500	)
Net deferred tax assets	$	156		$	—

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

	Year ended December 31,
	2017			2016			2015
Loss before taxes, as reported in the consolidated statements of operations	$	(11,235	)	$	(16,579	)	$	(20,597	)
Statutory tax rate		34	%		34	%		34	%
Theoretical tax benefits on the above amount at the US statutory tax rate	$	(3,820	)	$	(5,637	)	$	(7,003	)
Income tax at rate other than the U.S. statutory tax rate		(934	)		68			333
Tax advances and non-deductible expenses including equity based compensation expenses		3,123			4,298			1,061
Operating losses and other temporary differences for which valuation allowance was provided		(10,203	)		3,001			6,558
Research and Development Tax Credit		1,126			(1,182	)		-
State tax		(563	)		(536	)		(477	)
Impact of rate change		12,121			(360	)		(82	)
Change in tax reserve for uncertain tax positions		1,576			1,209			320
Other individually immaterial income tax items		33			270			(24	)
Actual tax expense	$	2,459		$	1,131		$	686

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

Gross unrecognized tax benefits as of January 1, 2016	$	897
Increase/decrease in tax position for current year		992
Increase/decrease in tax position for prior years		217
Gross unrecognized tax benefits as of December 31, 2016	$	2,106
Increase/decrease in tax position for current year		1,752
Increase/decrease in tax position for prior years		(176	)
Gross unrecognized tax benefits as of December 31, 2017	$	3,682