Net Loss per Share Attributable to Athenex, Inc. Common Stockholders - Schedule Weighted Average Outstanding Shares of Common Stock Equivalents Excluded from the Calculation of Diluted Net Loss Per Share (Detail) - shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total potential dilutive common shares	1,538,356	698,860
Stock Options and Other Common Stock Equivalents
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total potential dilutive common shares	1,501,661	681,202
Unvested Restricted Common Shares
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total potential dilutive common shares	36,695	17,658