Contingencies And Commitments (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Selas SAS, Liabilities	$ 438
Employment period	1 year
Maximum [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Base salary term	2 years
Minimum [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Base salary term	1 year