Discontinued Operation (Details 1) - USD ($) $ in Thousands	5 Months Ended	12 Months Ended
	May 22, 2018	Dec. 31, 2017
Discontinued Operations and Disposal Groups [Abstract]
Revenues	$ 1,512	$ 7,061
Cost of revenues	2,655	7,790
Gross profit (loss)	(1,143)	(729)
Operating expenses:
Research and development	120	672
Selling and marketing	204	546
General and administrative	376	2,199
Total operating expenses	700	3,417
Loss from operations	(1,843)	(4,146)
Capital gain	6,844
Finance expense, net	(102)	(632)
Profit (loss) before provision for income taxes	4,899	(4,778)
Taxes on income	5	124
Net profit (loss)	$ 4,894	$ (4,902)