Business Segment, Geographic, and Concentration Risk Information - Summary of Segment Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net loss attributable to Athenex, Inc.:
Total consolidated net loss attributable to Athenex, Inc.	$ (32,157)	$ (34,274)	$ (49,577)	$ (59,324)
Operating Segments
Net loss attributable to Athenex, Inc.:
Total consolidated net loss attributable to Athenex, Inc.	(23,816)	(30,906)	(52,540)	(52,240)
Discontinued operations
Net loss attributable to Athenex, Inc.:
Total consolidated net loss attributable to Athenex, Inc.	(8,341)	(3,368)	2,963	(7,084)
Oncology Innovation Platform | Operating Segments
Net loss attributable to Athenex, Inc.:
Total consolidated net loss attributable to Athenex, Inc.	(18,062)	(20,122)	(47,947)	(25,563)
Global Supply Chain Platform | Operating Segments
Net loss attributable to Athenex, Inc.:
Total consolidated net loss attributable to Athenex, Inc.	(3,324)	(576)	(4,096)	(542)
Commercial Platform | Operating Segments
Net loss attributable to Athenex, Inc.:
Total consolidated net loss attributable to Athenex, Inc.	$ (2,430)	$ (10,208)	$ (497)	$ (26,135)