Schedule of the computation of basic and diluted net income (loss) per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share [Abstract]
Weighted Average Number of Shares Outstanding, Diluted	32,152		31,242		31,945	31,022
Weighted Average Number of Shares Outstanding, Basic	32,152		31,242		31,945	31,022
Numerator:
Net loss	$ (3,468)	$ (10,470)	$ (4,857)	$ (11,735)	$ (13,938)	$ (16,592)
Denominator:
Weighted Average Number of Shares Outstanding, Basic and Diluted			31,242		31,945	31,022
Net loss per share
Earnings Per Share, Basic	$ (0.11)		$ (0.16)		$ (0.44)	$ (0.53)
Earnings Per Share, Diluted	$ (0.11)		$ (0.16)		$ (0.44)	$ (0.53)