Note 9 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Notes Tables

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

	Year ended December 31,
	2015			2014			2013
Domestic	$	(20,098	)	$	(15,606	)	$	(4,501	)
Foreign		(499	)		(3,416	)		(2,618	)
	$	(20,597	)	$	(19,022	)	$	(7,119	)

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

	Year ended December 31,
	2015		2014		2013
Domestic:
Federal	$	-	$	-	$	-
State		85		16		5
Foreign		601		360		351
	$	686	$	376	$	356

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

	December 31,
	2015			2014
Carry forward losses and credits	$	9,220		$	7,947
Deferred revenues		12,223			9,146
Accrued payroll, commissions, vacation		1,247			610
Allowance for doubtful accounts		88			64
Accrued severance pay		328			443
Other		2,393			731
Net deferred tax assets before valuation allowance		25,499			18,941
Valuation allowance		(25,499	)		(18,941	)
Net deferred tax assets	$	-		$	-

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

	Year ended December 31,
	2015			2014			2013
Loss before taxes, as reported in the consolidated statements of operations	$	(20,597	)	$	(19,022	)	$	(7,119	)
Statutory tax rate		34	%		34	%		34	%
Theoretical tax benefits on the above amount at the US statutory tax rate	$	(7,003	)	$	(6,468	)	$	(2,420	)
Income tax at rate other than the U.S. statutory tax rate		333			993			720
Tax advances and non-deductible expenses including equity based compensation expenses		1,061			1,296			715
Operating losses and other temporary differences for which valuation allowance was provided		6,558			4,596			803
State tax		(477	)		(409	)		(184	)
Impact of rate change		(82	)		49			537
Tax reserve for uncertain tax positions		320			308			119
Other individually immaterial income tax items		(24	)		11			66
Actual tax expense	$	686		$	376		$	356

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

Gross unrecognized tax benefits as of January 1, 2014	$	269
Increase/decrease in tax position for prior years		4
Increase in tax position for current year		304
Gross unrecognized tax benefits as of December 31, 2014		577
Increase/decrease in tax position for current year		474
Increase/decrease in tax position for prior years		(14	)
Decrease for lapse of statute of limitations		(140	)
Gross unrecognized tax benefits as of December 31, 2015	$	897