Asset Acquisition	9 Months Ended
Sep. 30, 2018
Asset Acquisition [Abstract]
Asset Acquisition	6. Asset Acquisition On June 29, 2018, the Company entered into a Share Subscription Agreement (“SSA”) for Axis Therapeutics (“Axis”), a subsidiary of the Company jointly owned by Athenex and Xiangxue Life Sciences Limited (“XLifeSc”). Under the SSA, Athenex contributed $30.0 million cash for a 55% ownership interest in Axis and XLifeSc contributed a license for IPR&D of certain immunotherapy technology for a 45% ownership interest in Axis. Also, on June 29, 2018, through a license agreement entered into between XLifeSc and Axis, XLifeSc granted Axis an exclusive, sublicensable worldwide (excluding mainland China) right and license to use its proprietary TCR-engineered T Cell therapy to develop and commercialize products for oncology indications (“TCR-T License”). Upon effectiveness of the TCR-T License and satisfaction of certain conditions of the license agreement, the Company issued 267,952 shares of its common stock equal to $5.0 million to XLifeSc as an upfront payment by Axis. On September 14, 2018, Athenex completed the $30.0 million cash injection to Axis and all the closing conditions under the SSA were fulfilled. The Company has consolidated the financial statements of Axis into its consolidated financial statements as of and for the nine months ended September 30, 2018 using the voting interest model. The nonmonetary exchange of 45% of the shares of Axis for the IPR&D from XLife has been accounted for as an asset acquisition that does not constitute a business under ASC 805. Therefore, the acquisition of IPR&D was expensed as research and development expense at its fair value. The Company determined that the fair value of the equity issued to XLifeSc was $24.5 million, considering the $30.0 million contribution made by the Company for its 55% ownership interest and the arms-length nature of the transaction. Accordingly, the Company recorded an expense of $24.5 million within research and development expenses on its consolidated statements of operations and comprehensive loss. This is a non-cash expense.

6. Asset Acquisition

On June 29, 2018, the Company entered into a Share Subscription Agreement (“SSA”) for Axis Therapeutics (“Axis”), a subsidiary of the Company jointly owned by Athenex and Xiangxue Life Sciences Limited (“XLifeSc”). Under the SSA, Athenex contributed $30.0 million cash for a 55% ownership interest in Axis and XLifeSc contributed a license for IPR&D of certain immunotherapy technology for a 45% ownership interest in Axis. Also, on June 29, 2018, through a license agreement entered into between XLifeSc and Axis, XLifeSc granted Axis an exclusive, sublicensable worldwide (excluding mainland China) right and license to use its proprietary TCR-engineered T Cell therapy to develop and commercialize products for oncology indications (“TCR-T License”). Upon effectiveness of the TCR-T License and satisfaction of certain conditions of the license agreement, the Company issued 267,952 shares of its common stock equal to $5.0 million to XLifeSc as an upfront payment by Axis. On September 14, 2018, Athenex completed the $30.0 million cash injection to Axis and all the closing conditions under the SSA were fulfilled.

The Company has consolidated the financial statements of Axis into its consolidated financial statements as of and for the nine months ended September 30, 2018 using the voting interest model. The nonmonetary exchange of 45% of the shares of Axis for the IPR&D from XLife has been accounted for as an asset acquisition that does not constitute a business under ASC 805. Therefore, the acquisition of IPR&D was expensed as research and development expense at its fair value. The Company determined that the fair value of the equity issued to XLifeSc was $24.5 million, considering the $30.0 million contribution made by the Company for its 55% ownership interest and the arms-length nature of the transaction. Accordingly, the Company recorded an expense of $24.5 million within research and development expenses on its consolidated statements of operations and comprehensive loss. This is a non-cash expense.