Net Loss Per Share - Summary of Basic and Diluted Net Loss per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Numerator:
Net loss attributable to Kineta, Inc.		$ 386	$ (5,878)	$ (6,065)	$ (10,854)
Denominator:
Weighted-average shares outstanding, basic	[1]	9,939	4,795	9,339	4,766
Weighted-average shares outstanding, diluted	[1]	9,939	4,795	9,339	4,766
Net income (loss) per share, basic		$ 0.04	$ (1.23)	$ (0.65)	$ (2.28)
Net income (loss) per share, diluted		$ 0.04	$ (1.23)	$ (0.65)	$ (2.28)

[1] Included in the denominator were 640,000 and 506,000 weighted-average shares of common stock warrants for the three and six months ended June 30, 2023, respectively, with exercise prices that ranged from $0.001 to $0.14. Included in the denominator were 146,000 weighted-average shares of common stock warrants for the three and six months ended June 30, 2022 with an exercise price of $0.14.