Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Summary of net revenues by geographic region
Total revenues	$ 758	$ 1,710	$ 2,052	$ 3,722
Revenues percentage	100.00%	100.00%	100.00%	100.00%
United States [Member]
Summary of net revenues by geographic region
Total revenues	$ 265	$ 898	$ 854	$ 1,962
Revenues percentage	35.00%	53.00%	42.00%	53.00%
Japan [Member]
Summary of net revenues by geographic region
Total revenues	$ 360	$ 417	$ 834	$ 1,017
Revenues percentage	48.00%	24.00%	41.00%	27.00%
Germany [Member]
Summary of net revenues by geographic region
Total revenues	$ 24	$ 185	$ 144	$ 371
Revenues percentage	3.00%	11.00%	7.00%	10.00%
Switzerland [Member]
Summary of net revenues by geographic region
Total revenues	$ 52	$ 40	$ 107	$ 57
Revenues percentage	7.00%	2.00%	5.00%	2.00%
China [Member]
Summary of net revenues by geographic region
Total revenues	$ 15	$ 53	$ 49	$ 128
Revenues percentage	2.00%	3.00%	2.00%	3.00%
Taiwan [Member]
Summary of net revenues by geographic region
Total revenues	$ 9	$ (22)	$ 9	$ 18
Revenues percentage	1.00%	(1.00%)		0.00%
Other [Member]
Summary of net revenues by geographic region
Total revenues	$ 33	$ 139	$ 55	$ 169
Revenues percentage	4.00%	8.00%	3.00%	5.00%