Selected Statements of Operations Data (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Financial income:
Exchange rate gains, net	$ 15	$ 4
Amortization of premium related to convertible loans	(1,257)	(2,149)
Total finance income	1,272	2,153
Financial expenses:
Accrued interest on convertible loans	45	56
Loss on marketable equity securities	(527)	(33)
Bank commissions and exchange rates	(3)	(4)
Loss from extinguishment of convertible loans (Note 8c,8d,8e)	(977)	(1,709)
Total financial expenses	(1,552)	(1,802)
Total financial income (expense), net	$ (280)	$ 351