Goodwill and Other Intangible Assets (Details) - USD ($)		3 Months Ended			6 Months Ended		12 Months Ended
	Apr. 18, 2022	Jun. 30, 2023	Sep. 30, 2022	Dec. 31, 2021	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022	Dec. 31, 2017
Goodwill and other intangible assets
Balance of finite-lived intangible assets		$ 7,941,875			$ 7,941,875		$ 8,669,375
Increase in liability for uncertain tax positions						$ 2,925
Increase in deferred tax liability					(571,120)	$ (3,326,000)
Pelican Therapeutics, Inc.
Goodwill and other intangible assets
Goodwill acquired								$ 2,200,000
In-process research and development impairment			$ 3,500,000
Goodwill impairment loss				$ 1,500,000
Pelican Therapeutics, Inc. | In-process R&D.
Goodwill and other intangible assets
Finite-lived intangible assets acquired								$ 5,900,000
Carrying value written down				5,900,000
Intangible assets fair value				3,500,000
In-process research and development impairment				$ 2,400,000
Elusys Therapeutics
Goodwill and other intangible assets
Goodwill acquired	$ 3,900,000
Finite-lived intangible assets acquired	$ 9,700,000
In-process research and development impairment					$ 0		$ 0
Remaining amortization period	80 months
Increase in goodwill		600,000
Increase in other assets		1,000,000.0
Increase in liability for uncertain tax positions		1,000,000.0
Increase in deferred tax liability		$ 600,000