Grant and Licensing Revenues (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Grant received for preclinical activities from CPRIT	$ 500,000		$ 900,000
Research funding revenue		$ 200,000		$ 200,000
Deferred revenue	$ 938,388		938,388
Pelican Therapeutics, Inc. [Member]
Grant received for preclinical activities from CPRIT			$ 15,200,000