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Acquisition of Pelican Therapeutics - Narrative (Details) - USD ($)	1 Months Ended		3 Months Ended			6 Months Ended
	Jun. 30, 2016	May 31, 2016	Jun. 30, 2020	Jun. 30, 2019	Mar. 31, 2018	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Oct. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Acquisition of Pelican Therapeutics
Discount rate						8.87%
Accrued liabilities			$ 1,202,705			$ 1,202,705		$ 1,676,467
Revenue			593,165	$ 342,487		1,495,045	$ 1,043,549
Net loss (income)			(4,454,430)	(4,770,870)		(10,746,536)	(10,486,346)
Net loss			$ 4,536,818	$ 4,944,905		$ 10,910,238	$ 10,763,986
Pelican Therapeutics, Inc.
Acquisition of Pelican Therapeutics
Ownership interest in subsidiary			85.00%			85.00%		85.00%
Pelican Therapeutics, Inc.
Acquisition of Pelican Therapeutics
Percentage of voting interests acquired in acquisition									85.00%	80.00%	80.00%
Discount rate					8.87%
Cash consideration					$ 200,000
Percentage of non-controlling interest acquired			20.00%			20.00%
Amount awarded from CPRIT grant		$ 15,200,000
Pelican Therapeutics, Inc. \| Maximum
Acquisition of Pelican Therapeutics
Amount awarded from CPRIT grant	$ 15,200,000
Pelican Therapeutics, Inc. \| Stockholders
Acquisition of Pelican Therapeutics
Cash consideration					$ 300,000
Pelican Therapeutics, Inc. \| CEO
Acquisition of Pelican Therapeutics
Percentage of milestone payments that will be paid to related parties					20.40%
Pelican Therapeutics, Inc. \| Edward B. Smith
Acquisition of Pelican Therapeutics
Percentage of milestone payments that will be paid to related parties					2.00%
Pelican Therapeutics, Inc. \| John Monahan
Acquisition of Pelican Therapeutics
Percentage of milestone payments that will be paid to related parties					0.30%