Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement Of Financial Position [Abstract]
Net loss	$ (45,319)	$ (55,998)	$ (160,199)	$ (145,941)
Other comprehensive loss
Change in unrealized gains and losses on investments	(171)	(209)	(4,834)	(886)
Comprehensive loss	(45,490)	(56,207)	(165,033)	(146,827)
Add: Comprehensive loss attributable to noncontrolling interest	38	95	136	95
Comprehensive loss attributable to Adaptive Biotechnologies Corporation	$ (45,452)	$ (56,112)	$ (164,897)	$ (146,732)