Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement Of Financial Position [Abstract]
Net loss	$ (207,298)	$ (146,227)	$ (68,606)
Other comprehensive (loss) income:
Change in unrealized gains and losses on investments	(2,030)	222	778
Comprehensive loss	(209,328)	(146,005)	(67,828)
Add: Comprehensive loss attributable to noncontrolling interest	19
Comprehensive loss attributable to Adaptive Biotechnologies Corporation	$ (209,309)	$ (146,005)	$ (67,828)