Schedule of Revenues Disaggregated by Source (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Revenues	$ 1,826	$ 3,515
Grant [Member]
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Revenues	1,053	2,037
Royalties From Product Sales and License Fees [Member]
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Revenues	773	1,221
Sale of Research Products and Services [Member]
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Revenues		$ 257