Description of business and basis of presentation	12 Months Ended
Dec. 31, 2014
Description of business and basis of presentation	1. Description of business and basis of presentation Business — MannKind Corporation and subsidiaries (the “Company”) is a biopharmaceutical company focused on the discovery and development of therapeutic products for diseases such as diabetes. Our only approved product, AFREZZA, (insulin human [rDNA origin]) inhalation powder , is a rapid-acting inhaled insulin that was approved by the U.S. Food and Drug Administration (the “FDA”) on June 27, 2014 to improve glycemic control in adult patients with diabetes. Basis of Presentation — The Company’s primary activities since incorporation have been establishing its facilities, recruiting personnel, conducting research and development, business development, business and financial planning, and raising capital. It is costly to develop therapeutic products and conduct clinical studies for these products. As of and for the year ended December 31, 2014, the Company has reported an accumulated deficit of $2.5 billion and has reported negative cash flow from operations since inception. At December 31, 2014, the Company’s capital resources consisted of cash and cash equivalents of $120.8 million. The Company expects to continue to incur significant expenditures to support commercial manufacturing of AFREZZA and the development of other product candidates. In addition, the Company’s 5.75% Senior Convertible Notes due 2015 (the “2015 notes”) in the aggregate principal amount of $100.0 million have a maturity date of August 15, 2015, and payment on the outstanding amount is due in full on that date (see Note 8 – Senior convertible notes). The facility agreement (the “Facility Agreement”) with Deerfield Private Design Fund II, L.P. (“Deerfield Private Design Fund”) and Deerfield Private Design International II, L.P. (collectively, “Deerfield”) and the First Amendment to Facility Agreement and Registration Rights Agreement (the “First Amendment”) additional sales of an additional tranche of notes (the “Tranche B notes”) (see Note 17 – Facility Agreement) contains a financial covenant that requires the Company’s cash and cash equivalents, which include available borrowings under this Loan Arrangement, on the last day of each fiscal quarter to not be less than $25.0 million. Should the holders of the notes not elect to convert such notes into the Company’s common stock prior to their due date, the Company intends to refinance the 2015 notes or raise additional funds to settle the 2015 notes. Although the Company believes that it can refinance the 2015 notes or obtain alternative financing to settle the 2015 notes, inherent uncertainty in achieving its projected cashflows and refinancing of the 2015 notes raises substantial doubt about the Company’s ability to continue as a going concern. The financial statements do not include any adjustments that might result from the outcome of these uncertainties. On August 11, 2014, we executed a license and collaboration agreement (the “Sanofi License Agreement”) with Sanofi-Aventis Deutschland GmbH (which subsequently assigned its rights and obligations under the agreement to Sanofi-Aventis U.S. LLC (“Sanofi”)), pursuant to which Sanofi is responsible for global commercial, regulatory and development activities for AFREZZA. The Sanofi License Agreement became effective on September 23, 2014. We manufacture AFREZZA at our manufacturing facility in Danbury, Connecticut to supply Sanofi’s demand for the product. In addition, we and Sanofi are planning to collaborate to expand manufacturing capacity to meet global demand as necessary. Under the Sanofi License Agreement, Sanofi paid us an up-front cash payment of $150.0 million in the third quarter of 2014. As of December 31, 2014, we have earned and recorded as Receivables from collaboration an additional $50.0 million in milestone payments in connection with the satisfaction of specified manufacturing milestones. Such payments were received subsequent to year end. We are also eligible to receive up to $725.0 million in additional milestone payments under the Sanofi License Agreement if certain development, regulatory and sales milestones are achieved. 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 us and Sanofi that are specifically attributable or related to the development, regulatory filings, manufacturing, or commercialization of AFREZZA, will be shared 65% by Sanofi and 35% by the us. As a result of the loss share provision, and because we do not have the ability to estimate the amount of costs that would potentially be incurred related to the Sanofi License Agreement, the amount of up-front cash payment or milestone payments that could be recognized as revenue is not fixed or determinable. In connection with the Sanofi License Agreement, an affiliate of Sanofi provided us with a secured loan facility (the “Sanofi Loan Facility”) of up to $175.0 million to fund our share of net losses under the Sanofi License Agreement. Additional funding sources that are, or in certain circumstances may be available to the Company, include approximately $30.1 million principal amount of available borrowings under its loan arrangement ( the “Loan Arrangement”) with The Mann Group LLC (“The Mann Group”) (see note 7 – Related-party arrangements), potential proceeds from the exercise of warrants issued in its February 2012 public offering of approximately $19.5 million, and the Company’s at-the-market issuance sales agreements which allow the Company to sell up to $50.0 million in common stock. The Company cannot provide assurances that its plans will not change or that changed circumstances will not result in the depletion of its capital resources more rapidly than it currently anticipates. The Company may need to raise additional capital, whether through a sale of equity or debt securities, a strategic business collaboration with a pharmaceutical company, the establishment of other funding facilities, licensing arrangements, asset sales or other means, in order to continue the development and commercialization of AFREZZA and other product candidates and to support its other ongoing activities. However, the Company cannot provide assurances that such additional capital will be available on acceptable terms or at all. Principles of Consolidation — The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. Intercompany balances and transactions have been eliminated. Segment Information — In accordance with Accounting Standards Codification (“ASC”) 280-10-50 Segment Reporting, operating segments are identified as components of an enterprise about which separate discrete financial information is available for evaluation by the chief operating decision-maker in making decisions regarding resource allocation and assessing performance. To date, the Company has viewed its operations and manages its business as one segment operating in the United States of America.

1. Description of business and basis of presentation

Business — MannKind Corporation and subsidiaries (the “Company”) is a biopharmaceutical company focused on the discovery and development of therapeutic products for diseases such as diabetes. Our only approved product, AFREZZA, (insulin human [rDNA origin]) inhalation powder , is a rapid-acting inhaled insulin that was approved by the U.S. Food and Drug Administration (the “FDA”) on June 27, 2014 to improve glycemic control in adult patients with diabetes.

Basis of Presentation — The Company’s primary activities since incorporation have been establishing its facilities, recruiting personnel, conducting research and development, business development, business and financial planning, and raising capital. It is costly to develop therapeutic products and conduct clinical studies for these products. As of and for the year ended December 31, 2014, the Company has reported an accumulated deficit of $2.5 billion and has reported negative cash flow from operations since inception.

At December 31, 2014, the Company’s capital resources consisted of cash and cash equivalents of $120.8 million. The Company expects to continue to incur significant expenditures to support commercial manufacturing of AFREZZA and the development of other product candidates. In addition, the Company’s 5.75% Senior Convertible Notes due 2015 (the “2015 notes”) in the aggregate principal amount of $100.0 million have a maturity date of August 15, 2015, and payment on the outstanding amount is due in full on that date (see Note 8 – Senior convertible notes). The facility agreement (the “Facility Agreement”) with Deerfield Private Design Fund II, L.P. (“Deerfield Private Design Fund”) and Deerfield Private Design International II, L.P. (collectively, “Deerfield”) and the First Amendment to Facility Agreement and Registration Rights Agreement (the “First Amendment”) additional sales of an additional tranche of notes (the “Tranche B notes”) (see Note 17 – Facility Agreement) contains a financial covenant that requires the Company’s cash and cash equivalents, which include available borrowings under this Loan Arrangement, on the last day of each fiscal quarter to not be less than $25.0 million. Should the holders of the notes not elect to convert such notes into the Company’s common stock prior to their due date, the Company intends to refinance the 2015 notes or raise additional funds to settle the 2015 notes. Although the Company believes that it can refinance the 2015 notes or obtain alternative financing to settle the 2015 notes, inherent uncertainty in achieving its projected cashflows and refinancing of the 2015 notes raises substantial doubt about the Company’s ability to continue as a going concern. The financial statements do not include any adjustments that might result from the outcome of these uncertainties.

On August 11, 2014, we executed a license and collaboration agreement (the “Sanofi License Agreement”) with Sanofi-Aventis Deutschland GmbH (which subsequently assigned its rights and obligations under the agreement to Sanofi-Aventis U.S. LLC (“Sanofi”)), pursuant to which Sanofi is responsible for global commercial, regulatory and development activities for AFREZZA. The Sanofi License Agreement became effective on September 23, 2014. We manufacture AFREZZA at our manufacturing facility in Danbury, Connecticut to supply Sanofi’s demand for the product. In addition, we and Sanofi are planning to collaborate to expand manufacturing capacity to meet global demand as necessary.

Under the Sanofi License Agreement, Sanofi paid us an up-front cash payment of $150.0 million in the third quarter of 2014. As of December 31, 2014, we have earned and recorded as Receivables from collaboration an additional $50.0 million in milestone payments in connection with the satisfaction of specified manufacturing milestones. Such payments were received subsequent to year end. We are also eligible to receive up to $725.0 million in additional milestone payments under the Sanofi License Agreement if certain development, regulatory and sales milestones are achieved. 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 us and Sanofi that are specifically attributable or related to the development, regulatory filings, manufacturing, or commercialization of AFREZZA, will be shared 65% by Sanofi and 35% by the us. As a result of the loss share provision, and because we do not have the ability to estimate the amount of costs that would potentially be incurred related to the Sanofi License Agreement, the amount of up-front cash payment or milestone payments that could be recognized as revenue is not fixed or determinable. In connection with the Sanofi License Agreement, an affiliate of Sanofi provided us with a secured loan facility (the “Sanofi Loan Facility”) of up to $175.0 million to fund our share of net losses under the Sanofi License Agreement.

Additional funding sources that are, or in certain circumstances may be available to the Company, include approximately $30.1 million principal amount of available borrowings under its loan arrangement ( the “Loan Arrangement”) with The Mann Group LLC (“The Mann Group”) (see note 7 – Related-party arrangements), potential proceeds from the exercise of warrants issued in its February 2012 public offering of approximately $19.5 million, and the Company’s at-the-market issuance sales agreements which allow the Company to sell up to $50.0 million in common stock. The Company cannot provide assurances that its plans will not change or that changed circumstances will not result in the depletion of its capital resources more rapidly than it currently anticipates. The Company may need to raise additional capital, whether through a sale of equity or debt securities, a strategic business collaboration with a pharmaceutical company, the establishment of other funding facilities, licensing arrangements, asset sales or other means, in order to continue the development and commercialization of AFREZZA and other product candidates and to support its other ongoing activities. However, the Company cannot provide assurances that such additional capital will be available on acceptable terms or at all.

Principles of Consolidation — The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. Intercompany balances and transactions have been eliminated.

Segment Information — In accordance with Accounting Standards Codification (“ASC”) 280-10-50 Segment Reporting, operating segments are identified as components of an enterprise about which separate discrete financial information is available for evaluation by the chief operating decision-maker in making decisions regarding resource allocation and assessing performance. To date, the Company has viewed its operations and manages its business as one segment operating in the United States of America.