The Merger (Schedule of preliminary allocation of purchase price) (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Preliminary allocation of purchase price:
Goodwill	$ 3,490,000	$ 3,490,000
AmpliPhi Biosciences Corporation [Member]
Preliminary allocation of purchase price:
Cash and cash equivalents		3,008,000
Prepaid expenses		257,000
Property and equipment		708,000
Right of use asset		271,000
In-process research and development		10,256,000
Total assets		14,500,000
Accounts payable		(4,004,000)
Other long term liabilities		(199,000)
Goodwill		3,490,000
Deferred tax liability acquired		(3,077,000)
Net assets acquired		7,220,000
Purchase price		$ 10,710,000