Collaboration arrangement	12 Months Ended
Dec. 31, 2015
Collaboration arrangement	9. Collaboration arrangement Sanofi License Agreement and Sanofi Supply Agreement On August 11, 2014, the Company and Sanofi entered into the Sanofi License Agreement, which became effective on September 23, 2014. Under the terms of the Sanofi License Agreement, the Company granted to Sanofi exclusive, worldwide licenses to certain of the Company’s patents, trademarks and know-how for the development and commercialization of AFREZZA. Under the terms of the Sanofi License Agreement, Sanofi has the exclusive right and responsibility to develop AFREZZA worldwide, subject to certain development activities that will be performed by the Company. Sanofi will also be obligated to use commercially reasonable efforts to file for, obtain and maintain marketing approvals for AFREZZA in certain major markets and countries. In addition, Sanofi will have exclusive, worldwide rights to commercialize AFREZZA and will be obligated to use commercially reasonable efforts to market, promote and commercialize AFREZZA in all countries in the world where regulatory approval for AFREZZA has been received. Pursuant to the terms of the Sanofi Supply Agreement, the Company is responsible for the manufacture and supply to Sanofi of its requirements of AFREZZA. Under the Sanofi License Agreement, Sanofi paid the Company an up-front cash payment of $150.0 million in the third quarter of 2014. If certain manufacturing, regulatory and sales milestones are achieved, the Company will also be eligible to receive up to $775.0 million in milestone payments, of which $75.0 million relates to certain development and manufacturing milestone events, $50.0 million relates to the filing and completion of regulatory approvals and $650.0 million relates to the achievement of certain product sales milestones. As of December 31, 2014, the Company earned and recorded a total of $50.0 million in milestone payments in connection with the satisfaction of manufacturing milestones specified in the Sanofi agreement, which were received subsequent to December 31, 2014. In addition, worldwide profits and losses, which are determined based on the difference between the net sales of AFREZZA and the costs and expenses incurred by the Company and Sanofi that are specifically attributable or related to the development, improvement, regulatory filings, manufacturing, and commercialization of AFREZZA will be shared 65% by Sanofi and 35% by the Company. In accordance with the terms of the Sanofi License Agreement, profit and loss sharing commenced in the fourth quarter of 2014. Pursuant to the terms of the Sanofi Supply Agreement, the Company will be the exclusive manufacturer and supplier of AFREZZA until the specified conditions are met, upon which a portion of the manufacturing activities may be assumed by Sanofi. The Company analyzed the agreements entered into with Sanofi under the provisions of ASC 605, Revenue Recognition, to determine whether the consideration, or a portion thereof, could be recognized as revenue. ASC 605 provides that revenue is recognized when there is persuasive evidence that an arrangement exists, delivery has occurred or services have been rendered, the price is fixed or determinable and collection is reasonably assured. In addition, revenue arrangements with multiple elements are divided into separate units of accounting if certain criteria are met, including whether the delivered element has stand-alone value to the customer. When deliverables are separable, consideration received is allocated to the separate units of accounting based on the relative selling price of each deliverable and the appropriate revenue recognition principles are applied to each unit. The assessment of multiple element arrangements requires judgment in order to determine the appropriate units of accounting and the points in time that, or periods over which, revenue should be recognized. Under the terms of the Sanofi License Agreement, Sanofi Supply Agreement and the Sanofi Loan Facility the Company determined that the arrangement contained significant deliverables including (i) licenses to develop and commercialize AFREZZA and to use the Company’s trademarks, (ii) development activities, and (iii) manufacture and supply services for AFREZZA. Due to the proprietary nature of the manufacturing services being provided by the Company, the Company determined that all of the significant deliverables should be combined into a single unit of accounting. The Company believes that the manufacturing services are proprietary due to the fact that since the late 1990’s, the Company has developed proprietary knowledge and patented equipment and tools that are used in the manufacturing process of AFREZZA. Due to the complexities of particle formulation and the specialized knowledge and equipment needed to handle the AFREZZA powder, neither Sanofi nor any third-party contract manufacturing organization currently possesses the capability of manufacturing AFREZZA. In order for revenue to be recognized, the seller’s price to the buyer must be fixed and determinable. Given that as of December 31, 2015, the Company did not have the ability to estimate the amount of costs that would potentially be incurred under the loss share provision related to the Sanofi License Agreement and the Sanofi Supply Agreement, the Company believes this requirement for revenue recognition has not been met. As such, the Company did not recognize any revenue pursuant to the Sanofi License Agreement or the Sanofi Supply Agreement for the years ended December 31, 2015 and 2014. The Company has recorded the $150.0 million up-front payment and $50.0 million from milestone payments as deferred payments from collaboration. In addition, as of December 31, 2015 the Company has recorded $17.5 million in AFREZZA product shipments to Sanofi as deferred product sales from collaboration and recorded $13.5 million as deferred product costs from collaboration. Deferred product costs represent the costs of product manufactured and shipped to Sanofi, not to exceed the amount of deferred product sales, for which recognition of revenue has been deferred. During the year ended December 31, 2015, the Company’s portion of the loss sharing was $57.7 million, which resulted in the reclassification from current deferred payments from collaboration to Sanofi loan facility and loss share obligation to reflect amounts owed to Sanofi. Sanofi Loan Facility On September 23, 2014, the Company entered into the Sanofi Loan Facility, consisting of a senior secured revolving promissory note and a guaranty and security agreement (the “Security Agreement”) with an affiliate of Sanofi which provides the Company with a secured loan facility of up to $175.0 million to fund the Company’s share of net losses under the Sanofi License Agreement. In the event of certain future defaults under the Sanofi Loan facility agreement for which the Company is not able to obtain waivers, the lender under the Sanofi Loan Facility may accelerate all of the Company’s repayment obligations, and take control of the Company’s pledged assets, potentially requiring the Company to renegotiate the terms of its indebtedness on terms less favorable to the Company, or to immediately cease operations. The obligations of the Company under the Sanofi Loan Facility are guaranteed by the Company’s wholly-owned subsidiary, MannKind LLC, and are secured by a first priority security interest in certain insulin inventory located in the United States and any contractual rights and obligations pursuant to which the Company purchases or has purchased such insulin, and a second priority security interest in the Company’s assets that secure the Company’s obligations under the Facility Agreement, as amended. In addition, the Company granted to Sanofi, as additional security for the obligations under the Sanofi Loan Facility, a first priority mortgage on the Company’s facility in Valencia, California, which has a carrying value of $17.9 million as of December 31, 2015. Advances under the Sanofi Loan Facility bear interest at a rate of 8.5% per annum and are payable in-kind and compounded quarterly and added to the outstanding principal balance under the Sanofi Loan Facility. The Company is required to make mandatory prepayments on the outstanding loans under the Sanofi Loan Facility from its share of any Profits (as defined in the Sanofi License Agreement) under the Sanofi License Agreement within 30 days of receipt of its share of any such Profits. No advances may be made under the Sanofi Loan Agreement if Deerfield has commenced enforcement proceedings in connection with an event of default under the Facility Agreement. The outstanding principal of all loans under the Sanofi Loan Facility, if not prepaid, will become due and payable on September 23, 2024 unless accelerated pursuant to the terms of the Sanofi Loan Facility. Additionally, if the Company sells its Valencia facility, the Company is required to prepay the loans under the Sanofi Loan Facility from the net cash proceeds of the sale within five business days of receipt. The Company’s total portion of the loss sharing was $57.7 million for the year ended December 31, 2015, of which $44.5 million was borrowed under the Sanofi Loan Facility as of December 31, 2015. Subsequent to December 31, 2015, the Company borrowed $17.9 million under the Sanofi Loan Facility to finance the portion of the Company’s loss for the quarter ended December 31, 2015. The total amount owed to Sanofi is $62.4 million, which includes $1.7 million in paid-in-kind interest. The Sanofi Loan Facility includes customary representations, warranties and covenants by the Company, including restrictions on its ability to incur additional indebtedness, grant certain liens and make certain changes to its organizational documents. Events of default under the Sanofi Loan Facility include: the Company’s failure to timely make payments due under the Sanofi Loan Facility; inaccuracies in the Company’s representations and warranties to the noteholder; the Company’s failure to comply with any of its covenants under any of the Sanofi Loan Facility or certain other related security agreements and documents entered into in connection with the Sanofi Loan Facility, subject to a cure period with respect to most covenants; the Company’s insolvency or the occurrence of certain bankruptcy-related events; termination by Sanofi of the Sanofi License Agreement as a result of the Company’s breach of the Sanofi License Agreement; and the failure of any material provision under any of the Sanofi Loan Facility or certain other related security agreements and documents entered into in connection with the Sanofi Loan Facility to remain in full force and effect. If one or more events of default occurs and is continuing, Sanofi may terminate its obligation to make advances under the Sanofi Loan Facility, and, if certain specified events of default (including the Company’s failure to timely make payments due under the Sanofi Loan Facility; the Company’s failure to comply with the negative covenants under the Sanofi Loan Facility limiting the Company’s ability to incur additional indebtedness or grant certain liens; the Company’s insolvency or the occurrence of certain bankruptcy-related events; termination by Sanofi of the Sanofi License Agreement as a result of the Company’s breach of the non-compete provisions of the Sanofi License Agreement; or the failure of any material provision under any of the Sanofi Loan Facility or certain other related security agreements and documents entered into in connection with the Sanofi Loan Facility to remain in full force and effect) occur and are continuing, the noteholder may accelerate all of the Company’s repayment obligations under the Sanofi Loan Facility and otherwise exercise any of its remedies as a secured creditor. There can be no assurance that the noteholder would not choose to exercise these rights in the event such events were to occur. Subsequent to December 31, 2015, the Company received written notice on January 4, 2016 from Sanofi of its election to terminate in its entirety the Sanofi License Agreement. Pursuant to its terms, the Sanofi Supply Agreement will terminate concurrently with the Sanofi License Agreement. Sanofi’s notice indicated that the termination was pursuant to Sanofi’s right to terminate the Sanofi License Agreement upon Sanofi’s good faith determination that the commercialization of AFREZZA is no longer economically viable in the United States, in which case the effective date of termination will be April 4, 2016. In the alternative, Sanofi indicated that the termination was also pursuant to its right to terminate the Sanofi License Agreement for any reason, in which case the effective date of termination will be July 4, 2016. In the interest of an expedient transition, the Company is currently working with Sanofi to transfer and wind down the agreement activities by April 4, 2016, or as soon as practicable thereafter. Pursuant to the terms of the Sanofi License Agreement, the Company and Sanofi are required to use diligent efforts to facilitate the smooth and orderly transition of relevant obligations and rights to the Company with respect to development and commercialization activities related to AFREZZA, and are also required to negotiate in good faith a written transition agreement for this purpose. As a result of the foregoing termination, effective on the Termination Date and thereafter during any period which Sanofi is required to perform any wind-down activities pursuant to the terms of the Sanofi License Agreement, the rights granted to Sanofi under the Sanofi License Agreement to develop and commercialize AFREZZA will become non-exclusive and the Company will have the right to engage one or more other distributors and/or licensees of AFREZZA. Sanofi will continue to distribute AFREZZA during the wind-down period as required by the agreement until such time that the Company or its designee takes over responsibility for distribution. All profits and losses from AFREZZA product sales by Sanofi or its affiliates after the Termination Date, if any, will continue to be shared 65% by Sanofi and 35% by the Company pursuant to the terms of the License Agreement. In addition to the Sanofi License Agreement and Sanofi Supply Agreement, as discussed above, the Company and Aventisub LLC, an affiliate of Sanofi, are parties to a Senior Secured Revolving Promissory Note, dated September 23, 2014 and a Guaranty and Security Agreement. Both the Sanofi Loan Facility and the Security Agreement remain in effect. The original maturity date of September 23, 2024 for repayment of the outstanding principal amount of the loans under the Sanofi Loan Facility will not be affected by the termination of the Sanofi License Agreement.

9. Collaboration arrangement

Sanofi License Agreement and Sanofi Supply Agreement

On August 11, 2014, the Company and Sanofi entered into the Sanofi License Agreement, which became effective on September 23, 2014. Under the terms of the Sanofi License Agreement, the Company granted to Sanofi exclusive, worldwide licenses to certain of the Company’s patents, trademarks and know-how for the development and commercialization of AFREZZA. Under the terms of the Sanofi License Agreement, Sanofi has the exclusive right and responsibility to develop AFREZZA worldwide, subject to certain development activities that will be performed by the Company. Sanofi will also be obligated to use commercially reasonable efforts to file for, obtain and maintain marketing approvals for AFREZZA in certain major markets and countries. In addition, Sanofi will have exclusive, worldwide rights to commercialize AFREZZA and will be obligated to use commercially reasonable efforts to market, promote and commercialize AFREZZA in all countries in the world where regulatory approval for AFREZZA has been received. Pursuant to the terms of the Sanofi Supply Agreement, the Company is responsible for the manufacture and supply to Sanofi of its requirements of AFREZZA.

Under the Sanofi License Agreement, Sanofi paid the Company an up-front cash payment of $150.0 million in the third quarter of 2014. If certain manufacturing, regulatory and sales milestones are achieved, the Company will also be eligible to receive up to $775.0 million in milestone payments, of which $75.0 million relates to certain development and manufacturing milestone events, $50.0 million relates to the filing and completion of regulatory approvals and $650.0 million relates to the achievement of certain product sales milestones. As of December 31, 2014, the Company earned and recorded a total of $50.0 million in milestone payments in connection with the satisfaction of manufacturing milestones specified in the Sanofi agreement, which were received subsequent to December 31, 2014. In addition, worldwide profits and losses, which are determined based on the difference between the net sales of AFREZZA and the costs and expenses incurred by the Company and Sanofi that are specifically attributable or related to the development, improvement, regulatory filings, manufacturing, and commercialization of AFREZZA will be shared 65% by Sanofi and 35% by the Company. In accordance with the terms of the Sanofi License Agreement, profit and loss sharing commenced in the fourth quarter of 2014.

Pursuant to the terms of the Sanofi Supply Agreement, the Company will be the exclusive manufacturer and supplier of AFREZZA until the specified conditions are met, upon which a portion of the manufacturing activities may be assumed by Sanofi.

The Company analyzed the agreements entered into with Sanofi under the provisions of ASC 605, Revenue Recognition, to determine whether the consideration, or a portion thereof, could be recognized as revenue. ASC 605 provides that revenue is recognized when there is persuasive evidence that an arrangement exists, delivery has occurred or services have been rendered, the price is fixed or determinable and collection is reasonably assured. In addition, revenue arrangements with multiple elements are divided into separate units of accounting if certain criteria are met, including whether the delivered element has stand-alone value to the customer. When deliverables are separable, consideration received is allocated to the separate units of accounting based on the relative selling price of each deliverable and the appropriate revenue recognition principles are applied to each unit.

The assessment of multiple element arrangements requires judgment in order to determine the appropriate units of accounting and the points in time that, or periods over which, revenue should be recognized. Under the terms of the Sanofi License Agreement, Sanofi Supply Agreement and the Sanofi Loan Facility the Company determined that the arrangement contained significant deliverables including (i) licenses to develop and commercialize AFREZZA and to use the Company’s trademarks, (ii) development activities, and (iii) manufacture and supply services for AFREZZA. Due to the proprietary nature of the manufacturing services being provided by the Company, the Company determined that all of the significant deliverables should be combined into a single unit of accounting. The Company believes that the manufacturing services are proprietary due to the fact that since the late 1990’s, the Company has developed proprietary knowledge and patented equipment and tools that are used in the manufacturing process of AFREZZA. Due to the complexities of particle formulation and the specialized knowledge and equipment needed to handle the AFREZZA powder, neither Sanofi nor any third-party contract manufacturing organization currently possesses the capability of manufacturing AFREZZA.

In order for revenue to be recognized, the seller’s price to the buyer must be fixed and determinable. Given that as of December 31, 2015, the Company did not have the ability to estimate the amount of costs that would potentially be incurred under the loss share provision related to the Sanofi License Agreement and the Sanofi Supply Agreement, the Company believes this requirement for revenue recognition has not been met.

As such, the Company did not recognize any revenue pursuant to the Sanofi License Agreement or the Sanofi Supply Agreement for the years ended December 31, 2015 and 2014. The Company has recorded the $150.0 million up-front payment and $50.0 million from milestone payments as deferred payments from collaboration. In addition, as of December 31, 2015 the Company has recorded $17.5 million in AFREZZA product shipments to Sanofi as deferred product sales from collaboration and recorded $13.5 million as deferred product costs from collaboration. Deferred product costs represent the costs of product manufactured and shipped to Sanofi, not to exceed the amount of deferred product sales, for which recognition of revenue has been deferred. During the year ended December 31, 2015, the Company’s portion of the loss sharing was $57.7 million, which resulted in the reclassification from current deferred payments from collaboration to Sanofi loan facility and loss share obligation to reflect amounts owed to Sanofi.

Sanofi Loan Facility

On September 23, 2014, the Company entered into the Sanofi Loan Facility, consisting of a senior secured revolving promissory note and a guaranty and security agreement (the “Security Agreement”) with an affiliate of Sanofi which provides the Company with a secured loan facility of up to $175.0 million to fund the Company’s share of net losses under the Sanofi License Agreement. In the event of certain future defaults under the Sanofi Loan facility agreement for which the Company is not able to obtain waivers, the lender under the Sanofi Loan Facility may accelerate all of the Company’s repayment obligations, and take control of the Company’s pledged assets, potentially requiring the Company to renegotiate the terms of its indebtedness on terms less favorable to the Company, or to immediately cease operations.

The obligations of the Company under the Sanofi Loan Facility are guaranteed by the Company’s wholly-owned subsidiary, MannKind LLC, and are secured by a first priority security interest in certain insulin inventory located in the United States and any contractual rights and obligations pursuant to which the Company purchases or has purchased such insulin, and a second priority security interest in the Company’s assets that secure the Company’s obligations under the Facility Agreement, as amended. In addition, the Company granted to Sanofi, as additional security for the obligations under the Sanofi Loan Facility, a first priority mortgage on the Company’s facility in Valencia, California, which has a carrying value of $17.9 million as of December 31, 2015.

Advances under the Sanofi Loan Facility bear interest at a rate of 8.5% per annum and are payable in-kind and compounded quarterly and added to the outstanding principal balance under the Sanofi Loan Facility. The Company is required to make mandatory prepayments on the outstanding loans under the Sanofi Loan Facility from its share of any Profits (as defined in the Sanofi License Agreement) under the Sanofi License Agreement within 30 days of receipt of its share of any such Profits. No advances may be made under the Sanofi Loan Agreement if Deerfield has commenced enforcement proceedings in connection with an event of default under the Facility Agreement.

The outstanding principal of all loans under the Sanofi Loan Facility, if not prepaid, will become due and payable on September 23, 2024 unless accelerated pursuant to the terms of the Sanofi Loan Facility. Additionally, if the Company sells its Valencia facility, the Company is required to prepay the loans under the Sanofi Loan Facility from the net cash proceeds of the sale within five business days of receipt.

The Company’s total portion of the loss sharing was $57.7 million for the year ended December 31, 2015, of which $44.5 million was borrowed under the Sanofi Loan Facility as of December 31, 2015. Subsequent to December 31, 2015, the Company borrowed $17.9 million under the Sanofi Loan Facility to finance the portion of the Company’s loss for the quarter ended December 31, 2015. The total amount owed to Sanofi is $62.4 million, which includes $1.7 million in paid-in-kind interest.

The Sanofi Loan Facility includes customary representations, warranties and covenants by the Company, including restrictions on its ability to incur additional indebtedness, grant certain liens and make certain changes to its organizational documents. Events of default under the Sanofi Loan Facility include: the Company’s failure to timely make payments due under the Sanofi Loan Facility; inaccuracies in the Company’s representations and warranties to the noteholder; the Company’s failure to comply with any of its covenants under any of the Sanofi Loan Facility or certain other related security agreements and documents entered into in connection with the Sanofi Loan Facility, subject to a cure period with respect to most covenants; the Company’s insolvency or the occurrence of certain bankruptcy-related events; termination by Sanofi of the Sanofi License Agreement as a result of the Company’s breach of the Sanofi License Agreement; and the failure of any material provision under any of the Sanofi Loan Facility or certain other related security agreements and documents entered into in connection with the Sanofi Loan Facility to remain in full force and effect. If one or more events of default occurs and is continuing, Sanofi may terminate its obligation to make advances under the Sanofi Loan Facility, and, if certain specified events of default (including the Company’s failure to timely make payments due under the Sanofi Loan Facility; the Company’s failure to comply with the negative covenants under the Sanofi Loan Facility limiting the Company’s ability to incur additional indebtedness or grant certain liens; the Company’s insolvency or the occurrence of certain bankruptcy-related events; termination by Sanofi of the Sanofi License Agreement as a result of the Company’s breach of the non-compete provisions of the Sanofi License Agreement; or the failure of any material provision under any of the Sanofi Loan Facility or certain other related security agreements and documents entered into in connection with the Sanofi Loan Facility to remain in full force and effect) occur and are continuing, the noteholder may accelerate all of the Company’s repayment obligations under the Sanofi Loan Facility and otherwise exercise any of its remedies as a secured creditor. There can be no assurance that the noteholder would not choose to exercise these rights in the event such events were to occur.

Subsequent to December 31, 2015, the Company received written notice on January 4, 2016 from Sanofi of its election to terminate in its entirety the Sanofi License Agreement. Pursuant to its terms, the Sanofi Supply Agreement will terminate concurrently with the Sanofi License Agreement. Sanofi’s notice indicated that the termination was pursuant to Sanofi’s right to terminate the Sanofi License Agreement upon Sanofi’s good faith determination that the commercialization of AFREZZA is no longer economically viable in the United States, in which case the effective date of termination will be April 4, 2016. In the alternative, Sanofi indicated that the termination was also pursuant to its right to terminate the Sanofi License Agreement for any reason, in which case the effective date of termination will be July 4, 2016. In the interest of an expedient transition, the Company is currently working with Sanofi to transfer and wind down the agreement activities by April 4, 2016, or as soon as practicable thereafter.

Pursuant to the terms of the Sanofi License Agreement, the Company and Sanofi are required to use diligent efforts to facilitate the smooth and orderly transition of relevant obligations and rights to the Company with respect to development and commercialization activities related to AFREZZA, and are also required to negotiate in good faith a written transition agreement for this purpose. As a result of the foregoing termination, effective on the Termination Date and thereafter during any period which Sanofi is required to perform any wind-down activities pursuant to the terms of the Sanofi License Agreement, the rights granted to Sanofi under the Sanofi License Agreement to develop and commercialize AFREZZA will become non-exclusive and the Company will have the right to engage one or more other distributors and/or licensees of AFREZZA. Sanofi will continue to distribute AFREZZA during the wind-down period as required by the agreement until such time that the Company or its designee takes over responsibility for distribution. All profits and losses from AFREZZA product sales by Sanofi or its affiliates after the Termination Date, if any, will continue to be shared 65% by Sanofi and 35% by the Company pursuant to the terms of the License Agreement.

In addition to the Sanofi License Agreement and Sanofi Supply Agreement, as discussed above, the Company and Aventisub LLC, an affiliate of Sanofi, are parties to a Senior Secured Revolving Promissory Note, dated September 23, 2014 and a Guaranty and Security Agreement. Both the Sanofi Loan Facility and the Security Agreement remain in effect. The original maturity date of September 23, 2024 for repayment of the outstanding principal amount of the loans under the Sanofi Loan Facility will not be affected by the termination of the Sanofi License Agreement.