Quarterly report pursuant to Section 13 or 15(d)

Acquisition of Pelican Therapeutics (Narrative) (Details)

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Acquisition of Pelican Therapeutics (Narrative) (Details) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Jun. 30, 2016
Mar. 31, 2018
Sep. 30, 2019
Oct. 31, 2018
Sep. 30, 2018
Pelican Therapeutics, Inc. [Member]          
Business Acquisition [Line Items]          
Percentage of voting interests acquired in acquisition     85.00% 85.00% 80.00%
Cash consideration     $ 200,000    
Percentage of probability-weighted     3.90%    
Percentage of non-controlling interest acquired     20.00%    
Amount awarded from CPRIT grant $ 15,200,000        
Pelican Therapeutics, Inc. [Member] | Stockholders [Member]          
Business Acquisition [Line Items]          
Cash consideration   $ 300,000      
Heat Biologics I, Inc. [Member]          
Business Acquisition [Line Items]          
Percentage of voting interests acquired in acquisition       80.00%