Annual report pursuant to Section 13 and 15(d)

Goodwill and In-process R&D (Schedule of In-process R&D) (Details)

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Goodwill and In-process R&D (Schedule of In-process R&D) (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]    
In-process R&D beginning balance $ 5,866,000
In-process R&D from acquisition of Pelican 5,866,000 5,866,000
Purchase accounting adjustments  
In-process R&D ending balance $ 5,866,000 $ 5,866,000