Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Kuur	Cidal	Common Stock	Common Stock Kuur	Common Stock Cidal	Additional Paid-in Capital	Additional Paid-in Capital Kuur	Additional Paid-in Capital Cidal	Accumulated Deficit	Accumulated Other Comprehensive Loss	Treasury Stock	Total Athenex, Inc. Stockholders' Equity	Total Athenex, Inc. Stockholders' Equity Kuur	Total Athenex, Inc. Stockholders' Equity Cidal	Non-Controlling Interests
Beginning balance at Dec. 31, 2018	$ 128,769			$ 69			$ 591,064			$ (443,716)	$ (656)	$ (7,406)	$ 139,355			$ (10,586)
Beginning balance, shares at Dec. 31, 2018				68,668,986								(1,672,920)
Sale of common stock	159,977			$ 14			159,963						159,977
Sale of common stock, shares				14,006,575
Equity consideration in connection with acquisition	748						748						748
Stock-based compensation cost	8,219						8,219						8,219
Restricted stock expense	1,671						1,671						1,671
Restricted stock expense, shares				223,723
Stock options exercised	1,983						1,983						1,983
Stock options exercised, shares				331,779
Net loss	(125,533)									(123,749)			(123,749)			(1,784)
Other comprehensive gain (loss), net of tax	21										21		21
Ending balance at Dec. 31, 2019	175,855			$ 83			763,648			(567,465)	(635)	$ (7,406)	188,225			(12,370)
Ending balance, shares at Dec. 31, 2019				83,231,063								(1,672,920)
Sale of common stock	119,110			$ 11			119,099						119,110
Sale of common stock, shares				11,607,322
Issuance of warrant, net	6,544						6,544						6,544
Stock-based compensation cost	9,833						9,833						9,833
Restricted stock expense	1,017						1,017						1,017
Restricted stock expense, shares				(10,820)
Stock options exercised	1,724			$ 1			1,723						1,724
Stock options exercised, shares				238,630
Non-controlling interests	198															198
Net loss	(148,434)									(146,179)			(146,179)			(2,255)
Other comprehensive gain (loss), net of tax	(499)										(499)		(499)
Ending balance at Dec. 31, 2020	165,348			$ 95			901,864			(713,644)	(1,134)	$ (7,406)	179,775			(14,427)
Ending balance, shares at Dec. 31, 2020				95,066,195								(1,672,920)
Sale of common stock through ATM and ESPP	1,342			$ 1			1,341						1,342
Sale of common stock through ATM and ESPP, shares				844,382
Equity consideration in connection with acquisition		$ 58,427	$ 1		$ 15			$ 58,412	$ 1					$ 58,427	$ 1
Equity consideration in connection with acquisition, shares					15,601,667	11,299
Stock-based compensation cost	8,591						8,591						8,591
Restricted stock expense	616						616						616
Stock options exercised	$ 1,579						1,579						1,579
Stock options exercised, shares	279,425			279,425
Treasury stock repurchase	$ (79)											$ (79)	(79)
Disposal of non-controlling interest	16															16
Net loss	(202,036)									(199,768)			(199,768)			(2,268)
Other comprehensive gain (loss), net of tax	647										647		647
Ending balance at Dec. 31, 2021	$ 34,452			$ 111			$ 972,404			$ (913,412)	$ (487)	$ (7,485)	$ 51,131			$ (16,679)
Ending balance, shares at Dec. 31, 2021				111,802,968								(1,672,920)