Goodwill and In-process R&D (Schedule of Goodwill and In-process R&D) (Details)	12 Months Ended
	Dec. 31, 2017 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill balance at December 31, 2016
Goodwill from acquisition of Pelican	2,189,338
Goodwill balance at December 31, 2017	2,189,338
In-process R&D balance at December 31, 2016
In-process R&D from acquisition of Pelican	5,866,000
In-process R&D balance at December 31, 2016	$ 5,866,000