Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive (Loss)	Treasury Stock	Total Athenex, Inc. Stockholders' Equity	Non-Controlling Interests
Beginning Balance at Dec. 31, 2016	$ 34,669	$ 42	$ 237,581	$ (195,106)	$ (1,304)	$ (7,406)	$ 33,807	$ 862
Beginning balance, shares at Dec. 31, 2016		42,342,706				(1,656,920)
Sale of common stock	64,194	$ 7	64,187				64,194
Sale of common stock, shares		6,900,000
Conversion of bonds	98,929	$ 9	98,920				98,929
Conversion of bonds, shares		8,522,728
Stock-based compensation cost	10,090		10,090				10,090
Stock-based compensation cost, shares		400,000
Research and development license purchased with stock	6,250	$ 1	6,249				6,250
Research and development license purchased with stock, shares		568,182
Vesting of restricted stock	1,620	$ 1	1,619				1,620
Vesting of restricted stock, shares		421,982
Stock options and warrants exercised	1,208		1,208				1,208
Stock options and warrants exercised, shares		512,586
Repurchase of common stock, shares						(16,000)
Non-controlling interests	49							49
Net loss	(103,001)			(102,887)			(102,887)	(114)
Other comprehensive income (loss), net of tax	892				892		892
Ending balance at Sep. 30, 2017	114,900	$ 60	419,854	(297,993)	(412)	$ (7,406)	114,103	797
Ending balance, shares at Sep. 30, 2017		59,668,184				(1,672,920)
Beginning Balance at Dec. 31, 2017	90,722	$ 60	423,805	(326,276)	(146)	$ (7,406)	90,037	685
Beginning balance, shares at Dec. 31, 2017		59,894,362				(1,672,920)
Sale of common stock	117,148	$ 7	117,141				117,148
Sale of common stock, shares		7,444,528
Issuance of warrants	3,140		3,140				3,140
Stock-based compensation cost	7,558		7,558				7,558
Research and development license purchased with stock	31,545		31,545				31,545
Research and development license purchased with stock, shares		375,133
Vesting of restricted stock	1,007		1,007				1,007
Vesting of restricted stock, shares		240,000
Stock options and warrants exercised	2,960	$ 1	2,959				2,960
Stock options and warrants exercised, shares		607,655
Net loss	(101,549)			(90,327)			(90,327)	(11,222)
Other comprehensive income (loss), net of tax	(474)				(474)		(474)
Ending balance at Sep. 30, 2018	$ 152,057	$ 68	$ 587,155	$ (416,603)	$ (620)	$ (7,406)	$ 162,594	$ (10,537)
Ending balance, shares at Sep. 30, 2018		68,561,678				(1,672,920)