Collaborative Research Agreements	12 Months Ended
Dec. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Collaborative Research Agreements	12. Collaborative Research Agreements We are a party to collaborative agreements with corporate partners to provide development and commercialization services relating to the collaborative products. These agreements are in the form of research and development collaboration and licensing agreements. In connection with these agreements, we have granted licenses or the rights to obtain licenses to our oral drug delivery technology. In return, we are entitled to receive certain payments upon the achievement of milestones and will receive royalties on sales of products should they be commercialized. Under these agreements, we are entitled to also be reimbursed for research and development costs. We also have the right to manufacture and supply delivery agents developed under these agreements to our corporate partners. We also perform research and development for others pursuant to feasibility agreements, which are of short duration and are designed to evaluate the applicability of our drug delivery agents to specific drugs. Under the feasibility agreements, we are generally reimbursed for the cost of work performed. All of our collaborative agreements are subject to termination by our corporate partners without significant financial penalty to them. Milestone and upfront payments received in connection with these agreements was $14.0 million, $0.0 million, and $10.0 million in the years ended December 31, 2015, 2014 and, 2013, respectively. There were no expenses incurred in connection with these agreements in the years ended December 31, 2015, 2014 and 2013. Significant agreements are described below. *Novo Nordisk Agreements* GLP-1 License Agreement On June 21, 2008, we entered into an exclusive Development and License Agreement with Novo Nordisk pursuant to which Novo Nordisk will develop and commercialize oral formulations of Novo Nordisk proprietary products in combination with Emisphere carriers (the “GLP-1 License Agreement”). Emisphere received approximately $32.6 million as of December 31, 2015, and could receive up to an additional $60 million in contingent product development and sales milestone payments under the terms of the GLP-1 License Agreement. Emisphere would also be entitled to receive royalties on sales in the event Novo Nordisk commercializes products developed under such agreement. Under the terms of the GLP-1 License Agreement, Novo Nordisk is responsible for the development and commercialization of the products. Initially Novo Nordisk is focusing on the development of oral formulations of its proprietary GLP-1 receptor agonists. In January 2010, Novo Nordisk had its first Phase I clinical trial with a long acting oral GLP-1 receptor agonist. This milestone released a $2 million payment to Emisphere. The GLP-1 License Agreement includes multiple deliverables including the license grant, several versions of the Company’s Eligen^® Technology (or carriers), support services and manufacturing. Emisphere management reviewed the relevant terms of the GLP-1 License Agreement and determined that such deliverables should be accounted for as a single unit of accounting in accordance with FASB ASC 605-25, Multiple-Element Arrangements, since the delivered license and Eligen^® Technology do not have stand-alone value and Emisphere does not have objective evidence of fair value of the undelivered Eligen^® Technology or the manufacturing value of all the undelivered items. Such conclusion will be reevaluated as each item in the arrangement is delivered. Consequently, any payments received from Novo Nordisk pursuant to such agreement, including the initial $10 million upfront payment and any payments received for support services, will be deferred and included in Deferred Revenue within our balance sheet. Management cannot currently estimate when all of such deliverables will be delivered nor can they estimate when, if ever, Emisphere will have objective evidence of the fair value for all of the undelivered items, therefore all payments from Novo Nordisk are expected to be deferred for the foreseeable future. On April 26, 2013, the Company entered into an Amendment No. 2 (the “Amendment”) to the GLP-1 License Agreement. The Amendment provides, among other things, for a payment of $10 million from Novo Nordisk to the Company as a prepayment for the achievement of certain development milestones that would have otherwise become payable to the Company under the GLP-1 License Agreement in exchange for a reduction in the rate of potential future royalty payments as provided in the GLP-1 License Agreement. The $10 million payment from Novo Nordisk was received by the Company on May 6, 2013, and recorded as deferred revenue. On October 14, 2015, we amended the GLP-1 License Agreement for a third time to provide for, among other things, a payment of $9.0 million to us from Novo Nordisk as prepayment of a product development milestone that would have otherwise become payable to the Company under the GLP-1 License Agreement and in exchange for a reduction in certain future royalty payments. The $9.0 million payment from Novo Nordisk was received October 26, 2015, and recorded as deferred revenue. As of December 31, 2015, total deferred revenue from the GLP-1 License Agreement was $32.6 million, comprised of the $9.0 million prepayment received October 26, 2015, the $10.0 million prepayment received April 26, 2013, the $10.0 million non-refundable license fee, $2 million milestone payment and $1.6 million in support services; compared to total deferred revenue of $23.6 million as of December 31, 2014. Expansion License Agreement On October 14, 2015, we also entered into a new Development and License Agreement with Novo Nordisk (the “Expansion License Agreement”) to develop and commercialize oral formulations of four classes of Novo Nordisk’s investigational molecules targeting major metabolic disorders, including diabetes and obesity, using our oral Eligen^® Technology. Under the terms of the Expansion License Agreement, we licensed to Novo Nordisk the exclusive right to develop potential product candidates in three molecule classes, and the non-exclusive right to develop potential product candidates in a fourth molecule class, using the Eligen^® Technology. Pursuant to the Expansion License Agreement, we received a $5.0 million upfront licensing fee, and are eligible to receive up to $62.5 million in development and sales milestone payments for each of the three exclusively licensed molecule classes, and up to $20 million in development milestone payments for the non-exclusively licensed molecule class. Additionally, we are eligible to receive royalties on sales of each successfully commercialized product. Novo Nordisk is solely responsible for the development and commercialization of all product candidates. In addition, Emisphere granted Novo Nordisk the option to obtain exclusive and non-exclusive rights to develop and commercialize oral formulations of additional investigational molecules for the treatment of diabetes, obesity, and indications in other important therapeutic areas using the Eligen^® Technology. If Novo Nordisk exercises its option to develop and commercialize any additional investigational molecules, we would be entitled to receive an additional payment upon the exercise of each option for exclusive or non-exclusive development rights for each molecule class. We are eligible to receive up to $62.5 million in development and sales milestone payments for each additional exclusively licensed molecule class, and up to $20 million in development milestone payments for each additional non-exclusively licensed molecule class, plus royalties on sales of each commercialized product. The agreement remains in effect, on a country-by-country basis, for the longer of 10 years from the date of first sale of a licensed product in such country, or the date of expiration of the last-to-expire patent covered by the agreement in such country. Novo Nordisk may terminate this agreement with 90 days prior notice. We may terminate this agreement in the event that Novo Nordisk challenges the validity of any licensed patent under the agreement, but only with respect to the patents belonging to the patent family of the challenged patent. Either party may also terminate the agreement upon the other party’s material breach, if not cured within a specified period of time. Upon a termination of the agreement by Emisphere for Novo Nordisk’s breach, all intellectual property rights conveyed under the agreement shall revert back to us. As of December 31, 2015, total deferred revenue from the Expansion License Agreement was $5.0 million, comprised of the non-refundable, non-creditable license fee. Insulins License Agreement On December 20, 2010, we entered into an exclusive Development and License Agreement with Novo Nordisk, pursuant to which we granted to Novo Nordisk an exclusive license to develop and commercialize oral formulations of Novo Nordisk’s insulins, using the Company’s proprietary delivery agents (the “Insulins License Agreement”). The Insulins License Agreement includes $57.5 million in potential product development and sales milestone payments including a $5.0 million non- refundable, non-creditable license fee. Emisphere would also be entitled to receive royalties in the event Novo Nordisk commercializes products developed under such the Insulins License Agreement. The Insulins License Agreement includes multiple deliverables including the license grant, several versions of the Company’s Eligen^® Technology (or carriers), support services and manufacturing. Emisphere management reviewed the relevant terms of the Novo Nordisk agreement and determined that such deliverables should be accounted for as a single unit of accounting in accordance with FASB ASC 605-25, Multiple-Element Arrangements, since the delivered license and Eligen^® Technology do not have stand-alone value and Emisphere does not have objective evidence of fair value of the undelivered Eligen^® Technology or the manufacturing value of all the undelivered items. Such conclusion will be reevaluated as each item in the arrangement is delivered. Consequently any payments received from Novo Nordisk pursuant to such agreement, including the initial $5.0 million upfront payment and any payments received for support services, will be deferred and included in Deferred Revenue within our balance sheet. Management cannot currently estimate when all of such deliverables will be delivered nor can they estimate when, if ever, Emisphere will have objective evidence of the fair value for all of the undelivered items, therefore all payments from Novo Nordisk are expected to be deferred for the foreseeable future. As of December 31, 2015 and 2014, total deferred revenue from the Insulins License Agreement was $5.0 million, comprised of the non-refundable, non-creditable license fee. *Novartis Agreements* Salmon Calcitonin Agreements We have collaborated with Novartis in connection with the development and testing of oral formulations of salmon calcitonin (“sCT”) to treat osteoarthritis and osteoporosis (the “Salmon Calcitonin Program”). We entered into a Research Collaboration and Option Agreement, dated as of December 3, 1997, as amended on October 20, 2000 (the “Salmon Calcitonin Option Agreement”) with Novartis to develop an oral form of sCT, which is a hormone that inhibits the bone-tissue resorbing activity of specialized bone cells called osteoclasts, enabling the bone to retain more of its mass and functionality. Pursuant to the Salmon Calcitonin Option Agreement, the Company granted Novartis the option to acquire from the Company a license to develop and commercialize oral sCT utilizing Emisphere’s Eligen^® Technology and the right to commence research collaboration with the Company with respect to a second compound, in exchange for certain option exercise payments. Novartis also agreed to reimburse the Company with respect to certain research and development costs incurred by the Company in connection with the sCT Program. Furthermore, under the Salmon Calcitonin Option Agreement, the Company is obligated to help to manage this program through a joint “steering committee” with Novartis. The Salmon Calcitonin Option Agreement expires upon the expiration of the last to expire of the patents of the Company described therein, subject to certain early termination rights, including termination by either party for material breach of the other party and termination by Novartis in favor of a license executed thereunder. In May 2007, Novartis and Nordic Bioscience notified the Company that they were initiating a Phase III clinical study of SMC021 for the treatment of osteoarthritis (“OA”) using the Company’s Eligen^® Technology. A second Phase III study of SMC021 for the treatment of OA, designed to meet FDA requirements for U.S. registration, was initiated by Novartis and Nordic Bioscience in October 2008. On December 14, 2011, the Company announced that Novartis had informed the Company that it will not pursue further clinical development of the investigational drug SMC021 (oral calcitonin) as a treatment option in osteoarthritis and for post-menopausal osteoporosis and that it will not seek regulatory submission for SMC021 in either indication. Novartis advised the Company that its decision to stop the clinical program of SMC021 in both indications was based on analysis and evaluation of data from three Phase III clinical trials (two in osteoarthritis and one in osteoporosis) conducted by Nordic Bioscience showed that SMC021 failed to meet key efficacy endpoints in all three trials, despite displaying a favorable safety profile. Although Novartis has not informed Emisphere of its intention to terminate the Salmon Calcitonin Option Agreement and the Salmon Calcitonin License Agreement, in the likely event that Novartis determines to terminate these agreements, we will reacquire the rights to our technology licensed to Novartis thereunder. Oral PTH-1-34 Agreements We have collaborated with Novartis in connection with the development and testing of oral formulations of PTH-1-34 (“PTH”) to treat osteoarthritis and osteoporosis (the “PTH Program”). On December 1, 2004, we entered into a Research Collaboration Option and License Agreement with Novartis whereby Novartis obtained an option to license our existing technology to develop oral forms of PTH 1-34 (the “PTH Option Agreement”). On March 7, 2006, Novartis exercised its option to the license. PTH is produced by the parathyroid glands to regulate the amount of calcium and phosphorus in the body. Recombinant PTH, currently approved for the treatment of osteoporosis, is available only by injection. When used therapeutically, it increases bone density and bone strength to help prevent fractures. It is approved to treat osteoporosis, a disease associated with a gradual thinning and weakening of the bones that occurs most frequently in women after menopause. Untreated postmenopausal osteoporosis can lead to chronic back pain, disabling fractures, and lost mobility. During April 2010, we announced that Novartis initiated a second Phase I trial for an oral PTH-1-34 which uses Emisphere’s Eligen^® Technology, and was in development for the treatment of postmenopausal osteoporosis. On June 17, 2011, the Company announced that Novartis informed Emisphere of the results of its recently completed Proof of Concept study for an oral PTH1-34 using Emisphere’s Eligen^® Technology in post-menopausal women with osteoporosis or osteopenia. Novartis informed Emisphere that, although the study confirmed that oral PTH1-34 was both safe and well-tolerated, several clinical endpoints were not met. Based on the data analyzed, Novartis has terminated the study and anticipates no further work on the oral formulation of PTH1-34. The Company has requested additional information from Novartis in order to further analyze and evaluate the results of this trial. Although Novartis has not informed Emisphere of its intention to terminate the PTH Option Agreement in accordance with relevant terms thereunder, Emisphere would reacquire the rights to develop and/or commercialize the product should Novartis so terminate the Agreement. Total deferred revenue as of December 31, 2015 and 2014 related to Novartis agreements was $13.0 million.

12. Collaborative Research Agreements

We are a party to collaborative agreements with corporate partners to provide development and commercialization services relating to the collaborative products. These agreements are in the form of research and development collaboration and licensing agreements. In connection with these agreements, we have granted licenses or the rights to obtain licenses to our oral drug delivery technology. In return, we are entitled to receive certain payments upon the achievement of milestones and will receive royalties on sales of products should they be commercialized. Under these agreements, we are entitled to also be reimbursed for research and development costs. We also have the right to manufacture and supply delivery agents developed under these agreements to our corporate partners.

We also perform research and development for others pursuant to feasibility agreements, which are of short duration and are designed to evaluate the applicability of our drug delivery agents to specific drugs. Under the feasibility agreements, we are generally reimbursed for the cost of work performed.

All of our collaborative agreements are subject to termination by our corporate partners without significant financial penalty to them. Milestone and upfront payments received in connection with these agreements was $14.0 million, $0.0 million, and $10.0 million in the years ended December 31, 2015, 2014 and, 2013, respectively. There were no expenses incurred in connection with these agreements in the years ended December 31, 2015, 2014 and 2013. Significant agreements are described below.

Novo Nordisk Agreements

GLP-1 License Agreement

On June 21, 2008, we entered into an exclusive Development and License Agreement with Novo Nordisk pursuant to which Novo Nordisk will develop and commercialize oral formulations of Novo Nordisk proprietary products in combination with Emisphere carriers (the “GLP-1 License Agreement”). Emisphere received approximately $32.6 million as of December 31, 2015, and could receive up to an additional $60 million in contingent product development and sales milestone payments under the terms of the GLP-1 License Agreement. Emisphere would also be entitled to receive royalties on sales in the event Novo Nordisk commercializes products developed under such agreement. Under the terms of the GLP-1 License Agreement, Novo Nordisk is responsible for the development and commercialization of the products. Initially Novo Nordisk is focusing on the development of oral formulations of its proprietary GLP-1 receptor agonists. In January 2010, Novo Nordisk had its first Phase I clinical trial with a long acting oral GLP-1 receptor agonist. This milestone released a $2 million payment to Emisphere.

The GLP-1 License Agreement includes multiple deliverables including the license grant, several versions of the Company’s Eligen^® Technology (or carriers), support services and manufacturing. Emisphere management reviewed the relevant terms of the GLP-1 License Agreement and determined that such deliverables should be accounted for as a single unit of accounting in accordance with FASB ASC 605-25, Multiple-Element Arrangements, since the delivered license and Eligen^® Technology do not have stand-alone value and Emisphere does not have objective evidence of fair value of the undelivered Eligen^® Technology or the manufacturing value of all the undelivered items. Such conclusion will be reevaluated as each item in the arrangement is delivered. Consequently, any payments received from Novo Nordisk pursuant to such agreement, including the initial $10 million upfront payment and any payments received for support services, will be deferred and included in Deferred Revenue within our balance sheet. Management cannot currently estimate when all of such deliverables will be delivered nor can they estimate when, if ever, Emisphere will have objective evidence of the fair value for all of the undelivered items, therefore all payments from Novo Nordisk are expected to be deferred for the foreseeable future.

On April 26, 2013, the Company entered into an Amendment No. 2 (the “Amendment”) to the GLP-1 License Agreement. The Amendment provides, among other things, for a payment of $10 million from Novo Nordisk to the Company as a prepayment for the achievement of certain development milestones that would have otherwise become payable to the Company under the GLP-1 License Agreement in exchange for a reduction in the rate of potential future royalty payments as provided in the GLP-1 License Agreement. The $10 million payment from Novo Nordisk was received by the Company on May 6, 2013, and recorded as deferred revenue.

On October 14, 2015, we amended the GLP-1 License Agreement for a third time to provide for, among other things, a payment of $9.0 million to us from Novo Nordisk as prepayment of a product development milestone that would have otherwise become payable to the Company under the GLP-1 License Agreement and in exchange for a reduction in certain future royalty payments. The $9.0 million payment from Novo Nordisk was received October 26, 2015, and recorded as deferred revenue.

As of December 31, 2015, total deferred revenue from the GLP-1 License Agreement was $32.6 million, comprised of the $9.0 million prepayment received October 26, 2015, the $10.0 million prepayment received April 26, 2013, the $10.0 million non-refundable license fee, $2 million milestone payment and $1.6 million in support services; compared to total deferred revenue of $23.6 million as of December 31, 2014.

Expansion License Agreement

On October 14, 2015, we also entered into a new Development and License Agreement with Novo Nordisk (the “Expansion License Agreement”) to develop and commercialize oral formulations of four classes of Novo Nordisk’s investigational molecules targeting major metabolic disorders, including diabetes and obesity, using our oral Eligen^® Technology. Under the terms of the Expansion License Agreement, we licensed to Novo Nordisk the exclusive right to develop potential product candidates in three molecule classes, and the non-exclusive right to develop potential product candidates in a fourth molecule class, using the Eligen^® Technology. Pursuant to the Expansion License Agreement, we received a $5.0 million upfront licensing fee, and are eligible to receive up to $62.5 million in development and sales milestone payments for each of the three exclusively licensed molecule classes, and up to $20 million in development milestone payments for the non-exclusively licensed molecule class. Additionally, we are eligible to receive royalties on sales of each successfully commercialized product. Novo Nordisk is solely responsible for the development and commercialization of all product candidates. In addition, Emisphere granted Novo Nordisk the option to obtain exclusive and non-exclusive rights to develop and commercialize oral formulations of additional investigational molecules for the treatment of diabetes, obesity, and indications in other important therapeutic areas using the Eligen^® Technology. If Novo Nordisk exercises its option to develop and commercialize any additional investigational molecules, we would be entitled to receive an additional payment upon the exercise of each option for exclusive or non-exclusive development rights for each molecule class. We are eligible to receive up to $62.5 million in development and sales milestone payments for each additional exclusively licensed molecule class, and up to $20 million in development milestone payments for each additional non-exclusively licensed molecule class, plus royalties on sales of each commercialized product. The agreement remains in effect, on a country-by-country basis, for the longer of 10 years from the date of first sale of a licensed product in such country, or the date of expiration of the last-to-expire patent covered by the agreement in such country. Novo Nordisk may terminate this agreement with 90 days prior notice. We may terminate this agreement in the event that Novo Nordisk challenges the validity of any licensed patent under the agreement, but only with respect to the patents belonging to the patent family of the challenged patent. Either party may also terminate the agreement upon the other party’s material breach, if not cured within a specified period of time. Upon a termination of the agreement by Emisphere for Novo Nordisk’s breach, all intellectual property rights conveyed under the agreement shall revert back to us.

As of December 31, 2015, total deferred revenue from the Expansion License Agreement was $5.0 million, comprised of the non-refundable, non-creditable license fee.

Insulins License Agreement

On December 20, 2010, we entered into an exclusive Development and License Agreement with Novo Nordisk, pursuant to which we granted to Novo Nordisk an exclusive license to develop and commercialize oral formulations of Novo Nordisk’s insulins, using the Company’s proprietary delivery agents (the “Insulins License Agreement”). The Insulins License Agreement includes $57.5 million in potential product development and sales milestone payments including a $5.0 million non- refundable, non-creditable license fee. Emisphere would also be entitled to receive royalties in the event Novo Nordisk commercializes products developed under such the Insulins License Agreement.

The Insulins License Agreement includes multiple deliverables including the license grant, several versions of the Company’s Eligen^® Technology (or carriers), support services and manufacturing. Emisphere management reviewed the relevant terms of the Novo Nordisk agreement and determined that such deliverables should be accounted for as a single unit of accounting in accordance with FASB ASC 605-25, Multiple-Element Arrangements, since the delivered license and Eligen^® Technology do not have stand-alone value and Emisphere does not have objective evidence of fair value of the undelivered Eligen^® Technology or the manufacturing value of all the undelivered items. Such conclusion will be reevaluated as each item in the arrangement is delivered. Consequently any payments received from Novo Nordisk pursuant to such agreement, including the initial $5.0 million upfront payment and any payments received for support services, will be deferred and included in Deferred Revenue within our balance sheet. Management cannot currently estimate when all of such deliverables will be delivered nor can they estimate when, if ever, Emisphere will have objective evidence of the fair value for all of the undelivered items, therefore all payments from Novo Nordisk are expected to be deferred for the foreseeable future.

As of December 31, 2015 and 2014, total deferred revenue from the Insulins License Agreement was $5.0 million, comprised of the non-refundable, non-creditable license fee.

Novartis Agreements

Salmon Calcitonin Agreements

We have collaborated with Novartis in connection with the development and testing of oral formulations of salmon calcitonin (“sCT”) to treat osteoarthritis and osteoporosis (the “Salmon Calcitonin Program”). We entered into a Research Collaboration and Option Agreement, dated as of December 3, 1997, as amended on October 20, 2000 (the “Salmon Calcitonin Option Agreement”) with Novartis to develop an oral form of sCT, which is a hormone that inhibits the bone-tissue resorbing activity of specialized bone cells called osteoclasts, enabling the bone to retain more of its mass and functionality. Pursuant to the Salmon Calcitonin Option Agreement, the Company granted Novartis the option to acquire from the Company a license to develop and commercialize oral sCT utilizing Emisphere’s Eligen^® Technology and the right to commence research collaboration with the Company with respect to a second compound, in exchange for certain option exercise payments. Novartis also agreed to reimburse the Company with respect to certain research and development costs incurred by the Company in connection with the sCT Program. Furthermore, under the Salmon Calcitonin Option Agreement, the Company is obligated to help to manage this program through a joint “steering committee” with Novartis. The Salmon Calcitonin Option Agreement expires upon the expiration of the last to expire of the patents of the Company described therein, subject to certain early termination rights, including termination by either party for material breach of the other party and termination by Novartis in favor of a license executed thereunder.

In May 2007, Novartis and Nordic Bioscience notified the Company that they were initiating a Phase III clinical study of SMC021 for the treatment of osteoarthritis (“OA”) using the Company’s Eligen^® Technology. A second Phase III study of SMC021 for the treatment of OA, designed to meet FDA requirements for U.S. registration, was initiated by Novartis and Nordic Bioscience in October 2008.

On December 14, 2011, the Company announced that Novartis had informed the Company that it will not pursue further clinical development of the investigational drug SMC021 (oral calcitonin) as a treatment option in osteoarthritis and for post-menopausal osteoporosis and that it will not seek regulatory submission for SMC021 in either indication. Novartis advised the Company that its decision to stop the clinical program of SMC021 in both indications was based on analysis and evaluation of data from three Phase III clinical trials (two in osteoarthritis and one in osteoporosis) conducted by Nordic Bioscience showed that SMC021 failed to meet key efficacy endpoints in all three trials, despite displaying a favorable safety profile.

Although Novartis has not informed Emisphere of its intention to terminate the Salmon Calcitonin Option Agreement and the Salmon Calcitonin License Agreement, in the likely event that Novartis determines to terminate these agreements, we will reacquire the rights to our technology licensed to Novartis thereunder.

Oral PTH-1-34 Agreements

We have collaborated with Novartis in connection with the development and testing of oral formulations of PTH-1-34 (“PTH”) to treat osteoarthritis and osteoporosis (the “PTH Program”). On December 1, 2004, we entered into a Research Collaboration Option and License Agreement with Novartis whereby Novartis obtained an option to license our existing technology to develop oral forms of PTH 1-34 (the “PTH Option Agreement”). On March 7, 2006, Novartis exercised its option to the license. PTH is produced by the parathyroid glands to regulate the amount of calcium and phosphorus in the body. Recombinant PTH, currently approved for the treatment of osteoporosis, is available only by injection. When used therapeutically, it increases bone density and bone strength to help prevent fractures. It is approved to treat osteoporosis, a disease associated with a gradual thinning and weakening of the bones that occurs most frequently in women after menopause. Untreated postmenopausal osteoporosis can lead to chronic back pain, disabling fractures, and lost mobility. During April 2010, we announced that Novartis initiated a second Phase I trial for an oral PTH-1-34 which uses Emisphere’s Eligen^® Technology, and was in development for the treatment of postmenopausal osteoporosis. On June 17, 2011, the Company announced that Novartis informed Emisphere of the results of its recently completed Proof of Concept study for an oral PTH1-34 using Emisphere’s Eligen^® Technology in post-menopausal women with osteoporosis or osteopenia. Novartis informed Emisphere that, although the study confirmed that oral PTH1-34 was both safe and well-tolerated, several clinical endpoints were not met. Based on the data analyzed, Novartis has terminated the study and anticipates no further work on the oral formulation of PTH1-34. The Company has requested additional information from Novartis in order to further analyze and evaluate the results of this trial. Although Novartis has not informed Emisphere of its intention to terminate the PTH Option Agreement in accordance with relevant terms thereunder, Emisphere would reacquire the rights to develop and/or commercialize the product should Novartis so terminate the Agreement.

Total deferred revenue as of December 31, 2015 and 2014 related to Novartis agreements was $13.0 million.