Goodwill and In-process R&D (Schedule of In-process R&D) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Goodwill and In-process R&D
In-process R&D beginning balance	$ 5,866,000
In-process R&D from acquisition of Pelican	5,866,000	$ 5,866,000
In-process R&D ending balance	$ 5,866,000	$ 5,866,000