Reduction in Force - Summary of Severance and Other Termination Benefit Expense with Remaining Balance of Liability Recorded in Accrued and Other Current Liabilities on Condensed Balance Sheet (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2025
Restructuring Cost and Reserve [Line Items]
Total severance and other benefits, at fair value			$ 5,368
Liability, beginning balance	$ 3,285	$ 0	0
(Credit)/Expense recognized during the period	(86)	5,118
Payments made during the period	(1,834)	(1,833)
Liability, ending balance	1,365	3,285	1,365
No Future Service Period Required
Restructuring Cost and Reserve [Line Items]
Total severance and other benefits, at fair value			5,118
Liability, beginning balance	3,285	0	0
(Credit)/Expense recognized during the period	(192)	5,118
Payments made during the period	(1,834)	(1,833)
Liability, ending balance	1,259	$ 3,285	1,259
Future Service Period Required
Restructuring Cost and Reserve [Line Items]
Total severance and other benefits, at fair value			250
(Credit)/Expense recognized during the period	106
Liability, ending balance	$ 106		$ 106

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Nkarta, Inc. 10-Q