Goodwill and other intangible assets - Carrying amount of goodwill, IPRD and intangible assets (Details) - USD ($)		1 Months Ended	3 Months Ended	12 Months Ended
	Apr. 18, 2022	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
Goodwill
Impairment				$ (3,873,079)
Intangible Assets
Impairment				(2,277,921)
Amortization of intangible asset				(1,091,250)	$ (1,030,625)
IPRD
Intangible Assets
Intangible assets beginning balance				0	3,500,000
Impairment					(3,500,000)
Intangible assets, ending balance				0	0
Elusys Therapeutics
Goodwill
Goodwill beginning balance				3,301,959
Impairment		$ (3,900,000)		(3,873,079)
Acquisition of Elusys Therapeutics	$ 3,300,000				5,067,748
Measurement period adjustments			$ (600,000)	(571,120)	(1,765,789)
Goodwill ending balance	3,873,080		$ 3,900,000		3,301,959
Intangible Assets
Impairment		$ (2,300,000)
Acquisition of Elusys Therapeutics	$ 9,700,000
Elusys Therapeutics | Intangible Assets
Intangible Assets
Intangible assets beginning balance				8,669,375
Impairment				(2,277,921)
Acquisition of Elusys Therapeutics					11,200,000
Measurement period adjustments					(1,500,000)
Amortization of intangible asset				(1,091,250)	(1,030,625)
Reclassified to discontinued operations				$ (5,300,204)
Intangible assets, ending balance					$ 8,669,375