Geographic Information and Major Customer and Product Data (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue, Major Customer [Line Items]
Total revenues	$ 4,873	$ 6,545	$ 7,753
Israel [Member]
Revenue, Major Customer [Line Items]
Total revenues	2
UNITED STATES
Revenue, Major Customer [Line Items]
Total revenues	2,003	3,558	4,598
Europe [Member]
Revenue, Major Customer [Line Items]
Total revenues	2,832	2,807	3,094
Asia-Pacific [Member]
Revenue, Major Customer [Line Items]
Total revenues	36	22	61
Latin America [Member]
Revenue, Major Customer [Line Items]
Total revenues		58
Africa [Member]
Revenue, Major Customer [Line Items]
Total revenues		$ 100