Note 9 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

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

	Year ended December 31,
	2016			2015			2014
Domestic	$	(16,898	)	$	(20,098	)	$	(15,606	)
Foreign		319			(499	)		(3,416	)
	$	(16,579	)	$	(20,597	)	$	(19,022	)

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

	Year ended December 31,
	2016		2015		2014
Domestic:
Federal	$	92	$	—	$	—
State		109		85		16
Foreign		930		601		360
	$	1,131	$	686	$	376

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

	December 31,
	2016			2015
Carry forward losses and credits	$	6,294		$	9,220
Deferred revenues		16,774			12,223
Accrued payroll, commissions, vacation		2,078			1,247
Allowance for doubtful accounts		43			88
Accrued severance pay		372			328
Other		2,939			2,393
Net deferred tax assets before valuation allowance		28,500			25,499
Valuation allowance		(28,500	)		(25,499	)
Net deferred tax assets	$	—		$	—

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

	Year ended December 31,
	2016			2015			2014
Loss before taxes, as reported in the consolidated statements of operations	$	(16,579	)	$	(20,597	)	$	(19,022	)
Statutory tax rate		34	%		34	%		34	%
Theoretical tax benefits on the above amount at the US statutory tax rate	$	(5,637	)	$	(7,003	)	$	(6,468	)
Income tax at rate other than the U.S. statutory tax rate		68			333			993
Tax advances and non-deductible expenses including equity based compensation expenses		4,298			1,061			1,296
Operating losses and other temporary differences for which valuation allowance was provided		3,001			6,558			4,596
Research and Development Tax Credit		(1,182	)		-			-
State tax		(536	)		(477	)		(409	)
Impact of rate change		(360	)		(82	)		49
Change in tax reserve for uncertain tax positions		1,209			320			308
Other individually immaterial income tax items		270			(24	)		11
Actual tax expense	$	1,131		$	686		$	376

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

Gross unrecognized tax benefits as of January 1, 2015	$	577
Increase/decrease in tax position for prior years		460
Decrease for lapse of statute of limitations		(140	)
Gross unrecognized tax benefits as of December 31, 2015		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