Deferred Revenue	3 Months Ended
Mar. 31, 2020
Revenue from Contract with Customer [Abstract]
Deferred Revenue	Deferred Revenue In October 2014, the Company entered into the Baxter Agreement with Baxter and received an upfront fee of $20 million. The upfront fee was recorded as deferred revenue and is being recognized based on the proportion of product shipments to Baxter in each period, compared with total expected sales volume over the term of the Baxter Agreement, which expires in October 2024. The Company recognized revenue of approximately $0.5 million for the three months ended March 31, 2020 and 2019. Deferred revenue related to the Baxter Agreement totaled $8.6 million as of March 31, 2020 and $9.1 million as of December 31, 2019. If a “Refund Trigger Event” occurs under the Baxter Agreement, we would be obligated to repay a portion of the upfront fee and any paid portion of the facility fee. In the event of a Refund Trigger Event occurring from April 1, 2020 to December 31, 2021, Baxter would be eligible for a 25% refund of the Baxter Agreement’s upfront fee. In addition, if Baxter terminates the Baxter Agreement because Baxter has been enjoined by a court of competent jurisdiction from selling in the United States any product covered by the Baxter Agreement due to a claim of intellectual property infringement or misappropriation relating to such product prior to the end of 2020, Baxter would be eligible for a partial refund of the upfront fee of $6.6 million. In no event does the Baxter Agreement require more than one refund be paid. In 2016, the Company entered into a distribution and license agreement with Wanbang (the "Wanbang Agreement") and received an upfront fee of $4.0 million. The upfront fee was recorded as deferred revenue and is being recognized as revenue based on the agreement term. The Company recognized revenue of approximately $0.1 million for the three months ended March 31, 2020 and 2019. Deferred revenue related to the Wanbang Agreement totaled $2.9 million as of March 31, 2020 and $3.0 million as of December 31, 2019. On January 14, 2020, we entered into license and supply agreements with Sun Pharma (the "Sun Pharma Agreements"), for the rights to commercialize Triferic Dialysate (ferric pyrophosphate citrate) in India. Under the terms of the Sun Pharma Agreements, Sun Pharma will be the exclusive development and commercialization partner for Triferic Dialysate in India, and we will supply the product to Sun Pharma. In consideration for the license, we received an upfront fee of $0.1 million, and will be eligible for milestone payments and royalties on net sales. A Joint Alliance Committee, comprised of members from the Company and Sun Pharma, will guide the development and execution for Triferic Dialysate in India. Sun Pharma will be responsible for all clinical, regulatory and commercialization activities. The upfront fee was recorded as deferred revenue and is being recognized as revenue based on the agreement term. The Company recognized revenue of approximately $2,500 during the three months ended March 31, 2020.

Deferred Revenue

In October 2014, the Company entered into the Baxter Agreement with Baxter and received an upfront fee of $20 million. The upfront fee was recorded as deferred revenue and is being recognized based on the proportion of product shipments to Baxter in each period, compared with total expected sales volume over the term of the Baxter Agreement, which expires in October 2024. The Company recognized revenue of approximately $0.5 million for the three months ended March 31, 2020 and 2019. Deferred revenue related to the Baxter Agreement totaled $8.6 million as of March 31, 2020 and $9.1 million as of December 31, 2019.

If a “Refund Trigger Event” occurs under the Baxter Agreement, we would be obligated to repay a portion of the upfront fee and any paid portion of the facility fee. In the event of a Refund Trigger Event occurring from April 1, 2020 to December 31, 2021, Baxter would be eligible for a 25% refund of the Baxter Agreement’s upfront fee. In addition, if Baxter terminates the Baxter Agreement because Baxter has been enjoined by a court of competent jurisdiction from selling in the United States any product covered by the Baxter Agreement due to a claim of intellectual property infringement or misappropriation relating to such product prior to the end of 2020, Baxter would be eligible for a partial refund of the upfront fee of $6.6 million. In no event does the Baxter Agreement require more than one refund be paid.

In 2016, the Company entered into a distribution and license agreement with Wanbang (the "Wanbang Agreement") and received an upfront fee of $4.0 million. The upfront fee was recorded as deferred revenue and is being recognized as revenue based on the agreement term. The Company recognized revenue of approximately $0.1 million for the three months ended March 31, 2020 and 2019. Deferred revenue related to the Wanbang Agreement totaled $2.9 million as of March 31, 2020 and $3.0 million as of December 31, 2019.

On January 14, 2020, we entered into license and supply agreements with Sun Pharma (the "Sun Pharma Agreements"), for the rights to commercialize Triferic Dialysate (ferric pyrophosphate citrate) in India. Under the terms of the Sun Pharma Agreements, Sun Pharma will be the exclusive development and commercialization partner for Triferic Dialysate in India, and we will supply the product to Sun Pharma. In consideration for the license, we received an upfront fee of $0.1 million, and will be eligible for milestone payments and royalties on net sales. A Joint Alliance Committee, comprised of members from the Company and Sun Pharma, will guide the development and execution for Triferic Dialysate in India. Sun Pharma will be responsible for all clinical, regulatory and commercialization activities. The upfront fee was recorded as deferred revenue and is being recognized as revenue based on the agreement term. The Company recognized revenue of approximately $2,500 during the three months ended March 31, 2020.