Commitments and Contingencies - Narrative (Details)	6 Months Ended	23 Months Ended
	Jun. 30, 2024 USD ($) country	Aug. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)	Nov. 09, 2023	Oct. 31, 2021	Feb. 28, 2018
Other Commitments [Line Items]
Term of lease				3 years	2 years	5 years
Renewal extension period					2 years
Right of use asset, gross	$ 500,000
Operating lease, accumulated amortization	100,000
Total operating lease liability	500,000
Operating lease liability, current	154,000		$ 0
Operating lease liability, non-current	$ 316,000		0
Remaining lease term	2 years 6 months
Weighted-average estimated incremental borrowing rate	22.40%
Payments for license agreement		$ 1,000,000.0
Accrued litigation liability	$ 0		$ 0
NKMAX
Other Commitments [Line Items]
Number of countries | country	4
Payment for milestones	$ 0
Sales of licensed technology	0
NKMAX | UNITED STATES
Other Commitments [Line Items]
Milestone payment, after regulatory approval	5,000,000.0
NKMAX | European Union
Other Commitments [Line Items]
Milestone payment, after regulatory approval	4,000,000.0
NKMAX | Country A
Other Commitments [Line Items]
Milestone payment, after regulatory approval	1,000,000.0
NKMAX | Country B
Other Commitments [Line Items]
Milestone payment, after regulatory approval	1,000,000.0
NKMAX | Country C
Other Commitments [Line Items]
Milestone payment, after regulatory approval	1,000,000.0
NKMAX | Country D
Other Commitments [Line Items]
Milestone payment, after regulatory approval	$ 1,000,000.0