Equity Method Investment	9 Months Ended
Sep. 30, 2023
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investment	5. Equity Method Investment On February 11, 2018, the Company entered into a joint venture agreement (the “JV Agreement”) with Shenzhen Hepalink Pharmaceutical Group Co., Ltd., a related party, principal shareholder of the Company, and a Chinese entity (“Hepalink”), to develop and commercialize products for infectious diseases. Under the terms of the JV Agreement, the Company contributed $1.0 million and the license of its technology relating to the Company’s AR-101 and AR-301 product candidates for use in the joint venture company named Shenzhen Arimab BioPharmaceuticals Co., Ltd. (the “JV Entity”) in the territories of the Republic of China, Hong Kong, Macau and Taiwan (the “Territory”) and initially owns 49% of the JV Entity. On July 2, 2018, the JV Entity received final approval from the government of the People’s Republic of China. It was agreed by the parties that the Company shall be reimbursed for certain legal and contract manufacturing expenses related to the clinical drug supply for a Phase 3 clinical study of AR-301 and the clinical drug supply for a clinical study of AR-105 (see Note 11). On August 6, 2018, the Company entered into an amendment to the JV Agreement with Hepalink whereby the Company agreed to additionally contribute an exclusive, revocable, and royalty-free right and license to its AR-105 product candidate in the Territory. Pursuant to the JV Agreement and the amendment, Hepalink initially owns 51% of the JV Entity and is obligated to contribute the equivalent of $7.2 million to the JV Entity. Additionally, Hepalink is obligated to make an additional equity investment of $10.8 million or more at the time of the JV Entity’s first future financing. The Company evaluated the accounting for the JV Agreement entered into noting that it did not meet the accounting definition of a joint venture and instead meets the definition of a variable interest entity. The Company concluded that it is not the primary beneficiary of the JV Entity and therefore is not required to consolidate the entity. This conclusion was based on the fact that the equity-at-risk is insufficient to support operations without additional investment and that the Company does not hold decision-making power over activities that significantly impact the JV Entity’s operations. The Company accounted for its investment in the JV Entity as an equity method investment. The Company recorded the equity method investment at $1.0 million which represents the Company’s contribution into the JV Entity. The Company’s license contributed to the JV Entity was recorded at its carryover basis of $0. The Company recognized no losses from the operations of the JV Entity for the three and nine months ended September 30, 2023 and 2022, respectively. As of September 30, 2023 and December 31, 2022, the Company’s equity method investment in the JV Entity was $0. On August 21, 2023, Aridis Pharmaceuticals, Inc. (the “Company”) sent written notice to Shenzhen Arimab Biopharmaceuticals Co., Ltd. (“Arimab”) stating that as of August 21, 2023, the Amended and Restated Technology License and Collaboration Agreement between Arimab, a joint venture of the Company and Shenzhen Hepalink Pharmaceutical Group Co., Ltd. dated as of August 6, 2018 (the “Agreement”) would terminate pursuant to Section 11.2 of the Agreement.

Equity Method Investment

9 Months Ended

Sep. 30, 2023

Equity Method Investments and Joint Ventures [Abstract]

5. Equity Method Investment

On February 11, 2018, the Company entered into a joint venture agreement (the “JV Agreement”) with Shenzhen Hepalink Pharmaceutical Group Co., Ltd., a related party, principal shareholder of the Company, and a Chinese entity (“Hepalink”), to develop and commercialize products for infectious diseases. Under the terms of the JV Agreement, the Company contributed $1.0 million and the license of its technology relating to the Company’s AR-101 and AR-301 product candidates for use in the joint venture company named Shenzhen Arimab BioPharmaceuticals Co., Ltd. (the “JV Entity”) in the territories of the Republic of China, Hong Kong, Macau and Taiwan (the “Territory”) and initially owns 49% of the JV Entity. On July 2, 2018, the JV Entity received final approval from the government of the People’s Republic of China. It was agreed by the parties that the Company shall be reimbursed for certain legal and contract manufacturing expenses related to the clinical drug supply for a Phase 3 clinical study of AR-301 and the clinical drug supply for a clinical study of AR-105 (see Note 11).

On August 6, 2018, the Company entered into an amendment to the JV Agreement with Hepalink whereby the Company agreed to additionally contribute an exclusive, revocable, and royalty-free right and license to its AR-105 product candidate in the Territory. Pursuant to the JV Agreement and the amendment, Hepalink initially owns 51% of the JV Entity and is obligated to contribute the equivalent of $7.2 million to the JV Entity. Additionally, Hepalink is obligated to make an additional equity investment of $10.8 million or more at the time of the JV Entity’s first future financing.

The Company evaluated the accounting for the JV Agreement entered into noting that it did not meet the accounting definition of a joint venture and instead meets the definition of a variable interest entity. The Company concluded that it is not the primary beneficiary of the JV Entity and therefore is not required to consolidate the entity. This conclusion was based on the fact that the equity-at-risk is insufficient to support operations without additional investment and that the Company does not hold decision-making power over activities that significantly impact the JV Entity’s operations. The Company accounted for its investment in the JV Entity as an equity method investment. The Company recorded the equity method investment at $1.0 million which represents the Company’s contribution into the JV Entity. The Company’s license contributed to the JV Entity was recorded at its carryover basis of $0.

The Company recognized no losses from the operations of the JV Entity for the three and nine months ended September 30, 2023 and 2022, respectively. As of September 30, 2023 and December 31, 2022, the Company’s equity method investment in the JV Entity was $0.

On August 21, 2023, Aridis Pharmaceuticals, Inc. (the “Company”) sent written notice to Shenzhen Arimab Biopharmaceuticals Co., Ltd. (“Arimab”) stating that as of August 21, 2023, the Amended and Restated Technology License and Collaboration Agreement between Arimab, a joint venture of the Company and Shenzhen Hepalink Pharmaceutical Group Co., Ltd. dated as of August 6, 2018 (the “Agreement”) would terminate pursuant to Section 11.2 of the Agreement.