Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Income Statement [Abstract]
Revenues	$ 6,545	$ 7,753	[1]	$ 5,869	[1]
Cost of revenues	3,720	4,652		5,133
Gross profit	2,825	3,101		736
Operating expenses:
Research and development, net	7,349	6,042		9,028
Sales and marketing	7,897	11,360		13,961
General and administrative	6,793	7,691		8,188
Total operating expenses	22,039	25,093		31,177
Operating loss	(19,214)	(21,992)		(30,441)
Loss on extinguishment of debt		313
Financial expenses, net	2,466	2,293		2,059
Loss before income taxes	(21,680)	(24,598)		(32,500)
Income taxes (tax benefit)	(5)	119		3
Net loss	$ (21,675)	$ (24,717)		$ (32,503)
Net loss per ordinary share, basic and diluted	$ (0.59)	$ (1.22)		$ (2.47)
Weighted average number of shares used in computing net loss per ordinary share, basic and diluted	36,812,476	20,214,895		13,178,107

[1] As noted above, prior period amounts have not been adjusted under the modified retrospective method.