Note 14 - Taxes on Income - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Reserves and accruals	$ 284	$ 1,202
Equity-based compensation	1,621	922
Intangible assets	184	320
Carryforward tax losses	6,715	4,368	[1]
Other	858	229
Total deferred tax assets	9,662	7,041
Valuation allowance	(6,082)	(5,998)
Total deferred tax assets	3,580	1,043
Acquired intangible assets	195	565
Acquired carryforward tax losses	(44)	(141)
Total deferred tax liabilities, net	$ 151	$ 424

[1] The amount in 2015 is after a deduction of $200,208 carryforward tax losses of a foreign subsidiary that expired by December 31, 2015.