License, Collaboration and Other Agreements	3 Months Ended
Mar. 31, 2026
License Agreement [Abstract]
License, Collaboration and Other Agreements	3. License, Collaboration and Other Agreements Kyorin Pharmaceutical Co., Ltd. In January 2020, we entered into a collaboration and license agreement (Kyorin Agreement) with Kyorin Pharmaceutical Co., Ltd. (Kyorin) for the development and commercialization of efzofitimod for the treatment of interstitial lung disease (ILD) in Japan. Under the Kyorin Agreement, Kyorin received an exclusive right to develop and commercialize efzofitimod in Japan for all forms of ILD, and is obligated to fund all research, development, regulatory, marketing and commercialization activities in Japan. In 2020, Kyorin conducted and funded a Phase 1 clinical trial of efzofitimod (known as KRP-R120 in Japan). The Phase 1 clinical trial was a placebo-controlled clinical trial to evaluate the safety, pharmacokinetics (PK) and immunogenicity of efzofitimod in 32 healthy Japanese male volunteers. Efzofitimod was observed to be generally well-tolerated with no drug-related serious adverse events, and PK findings were consistent with previous studies of efzofitimod. Kyorin has also participated in the EFZO-FIT study as the local sponsor in Japan. In February 2023, Kyorin dosed the first patient in Japan in the EFZO-FIT study which triggered a $10.0 million milestone payment to us. To date, the Kyorin Agreement has generated $20.0 million in upfront and milestone payments to us. We assessed our license and collaboration with Kyorin in accordance with Topic 606 which applies to delivered goods or services to a customer and concluded that Kyorin is a customer. For the three months ended March 31, 2026 and 2025, there were no activities that triggered additional license and collaboration agreement revenue under the Kyorin Agreement. On May 12, 2026 we received notice of termination of the Kyorin Agreement with Kyorin. Refer to our discussion of the termination in Note 6 – Subsequent Events.

License, Collaboration and Other Agreements

3 Months Ended

Mar. 31, 2026

License, Collaboration and Other Agreements

3. License, Collaboration and Other Agreements

Kyorin Pharmaceutical Co., Ltd.

In January 2020, we entered into a collaboration and license agreement (Kyorin Agreement) with Kyorin Pharmaceutical Co., Ltd. (Kyorin) for the development and commercialization of efzofitimod for the treatment of interstitial lung disease (ILD) in Japan. Under the Kyorin Agreement, Kyorin received an exclusive right to develop and commercialize efzofitimod in Japan for all forms of ILD, and is obligated to fund all research, development, regulatory, marketing and commercialization activities in Japan. In 2020, Kyorin conducted and funded a Phase 1 clinical trial of efzofitimod (known as KRP-R120 in Japan). The Phase 1 clinical trial was a placebo-controlled clinical trial to evaluate the safety, pharmacokinetics (PK) and immunogenicity of efzofitimod in 32 healthy Japanese male volunteers. Efzofitimod was observed to be generally well-tolerated with no drug-related serious adverse events, and PK findings were consistent with previous studies of efzofitimod. Kyorin has also participated in the EFZO-FIT study as the local sponsor in Japan. In February 2023, Kyorin dosed the first patient in Japan in the EFZO-FIT study which triggered a $10.0 million milestone payment to us. To date, the Kyorin Agreement has generated $20.0 million in upfront and milestone payments to us.

We assessed our license and collaboration with Kyorin in accordance with Topic 606 which applies to delivered goods or services to a customer and concluded that Kyorin is a customer. For the three months ended March 31, 2026 and 2025, there were no activities that triggered additional license and collaboration agreement revenue under the Kyorin Agreement.

On May 12, 2026 we received notice of termination of the Kyorin Agreement with Kyorin. Refer to our discussion of the termination in Note 6 – Subsequent Events.