Description of Business	12 Months Ended
Dec. 31, 2017
Accounting Policies [Abstract]
Description of Business	1. Description of Business Business — MannKind Corporation and Subsidiaries (the “Company”) is a biopharmaceutical company focused on the development and commercialization of inhaled therapeutic products for diseases such as diabetes and pulmonary arterial hypertension. The Company’s only approved product, Afrezza (insulin human) inhalation powder, is a rapid-acting inhaled insulin that was approved by the U.S. Food and Drug Administration (the “FDA”) in June of 2014 to improve glycemic control in adults with diabetes. Afrezza became available by prescription in U.S. retail pharmacies in February 2015. Pursuant to a license and collaboration agreement (the “Sanofi License Agreement”) between the Company and Sanofi-Aventis U.S. LLC (“Sanofi”). Sanofi was responsible for global commercial, regulatory and development activities associated with Afrezza from August 2014 to April 2016. After a transition period during which Sanofi continued to fulfill orders for Afrezza, the Company assumed responsibility for worldwide development and commercialization of Afrezza and the Company began distributing MannKind-branded Afrezza to wholesalers in July 2016. During the second half of 2016, the Company utilized a contract sales organization to promote Afrezza while the Company focused its internal resources on establishing a channel strategy, entering into distribution agreements and developing co-pay assistance programs, a voucher program, data agreements and payor relationships. In early 2017, the Company recruited its own specialty sales force to promote Afrezza to endocrinologists and certain high-prescribing primary care physicians. The Company’s current strategy for future commercialization of Afrezza outside of the United States, subject to receipt of the necessary foreign regulatory approvals, is to seek and establish regional partnerships in foreign jurisdictions where there are appropriate commercial opportunities. Basis of Presentation - The accompanying consolidated financial statements have been prepared assuming that the Company will continue as a going concern which contemplates the realization of assets and satisfaction of liabilities in the normal course of business. The Company is not currently profitable and has rarely generated positive net cash flow from operations. As of December 31, 2017, the Company had an accumulated deficit of $(2.9) billion. At December 31, 2017, the Company’s capital resources consisted of cash and cash equivalents of $43.9 million. The Company expects to continue to incur significant expenditures to support commercial manufacturing, sales and marketing of Afrezza and the development of product candidates in the Company’s pipeline. 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”) that resulted in the issuance of 9.75% Senior Convertible Notes due 2019 (“2019 notes”) and the First Amendment to Facility Agreement and Registration Rights Agreement (the “First Amendment”) that resulted in the issuance of an additional tranche of 8.75% Senior Convertible Notes due 2019 (“Tranche B notes”) (see Note 7 — Borrowings) requires the Company to maintain at least $25.0 million in cash and cash equivalents or available borrowings under the loan arrangement, dated as of October 2, 2007, between the Company and The Mann Group LLC (“The Mann Group”) (as amended, restated, or otherwise modified as of the date hereof, “The Mann Group Loan Arrangement”), as of the last day of each fiscal quarter. On June 29, 2017, the Company entered into an Exchange and Third Amendment to the Facility Agreement (the “Third Amendment”) with Deerfield which, among other things, amended such financial covenant to provide that, if certain conditions are met, then the obligation to maintain at least $25.0 million in cash as of the end of each quarter will be reduced to $10.0 million as of August 31, 2017, September 30, 2017, October 31, 2017 and December 31, 2017 if certain conditions were met (see Note 7 — Borrowings). We met the conditions at each of these month-ends. As of December 31, 2017, the Company has $157.8 million principal amount of outstanding borrowings. The Company has entered into certain transaction related to these borrowings during 2017 and 2018 that are more fully described in Note 6 - Related Party Agreements, Note 7 – Borrowings and Note 20 – Subsequent Events. The Company’s available cash and financing sources will not be sufficient to meet its current and anticipated cash requirements, accordingly, these factors, among others, raise substantial doubt about the Company’s ability to continue as a going concern. The Company plans to raise additional capital, whether through a sale of equity or debt securities, a strategic business collaboration with another 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. The Company cannot provide assurances that such additional capital will be available on acceptable terms or at all. Successful completion of these plans is dependent on factors outside of the Company’s control. As such, management cannot be certain that such plans will be effectively implemented within one year after the date that the financial statements are issued. These factors raise 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 this uncertainty. Reverse Stock Split - On March 1, 2017, following stockholder approval, the Company’s board of directors approved a 1-for-5 reverse stock split of its outstanding common stock. On March 1, 2017, the Company filed with the Secretary of State of the State of Delaware a Certificate of Amendment of the Company’s Amended and Restated Certificate of Incorporation (the “Charter Amendment”) to effect the 1-for-5 reverse stock split of the Company’s outstanding common stock (the “Reverse Stock Split”) and to reduce the authorized number of shares of the Company’s common stock from 700,000,000 to 140,000,000 shares. The Company’s common stock began trading on the NASDAQ Global Market on a split-adjusted basis when the market opened on March 3, 2017. As a result, prior to March 3, 2017, all common stock share amounts included in these consolidated financial statements have been retroactively reduced by a factor of five, and all common stock per share amounts have been increased by a factor of five, with the exception of the Company’s common stock par value. Correction of an Immaterial Error — Subsequent to the issuance of the Company’s financial statements for the year ended December 31, 2016 on Form 10-K, the Company determined that the common stock par value as of December 31, 2016 should not have been retrospectively adjusted for the impact of the reverse stock split on March 3, 2017 as described above. Management evaluated the materiality of the errors from a quantitative and qualitative perspective and concluded that this adjustment was not material to the Company’s previously issued financial statements. The Company has elected to revise the historical consolidated financial information presented herein in the consolidated balance sheet and statements of stockholders’ deficit to reflect the correction of this error for the prior periods presented. Since the revisions were not material, no amendments to previously filed reports were required. The revisions had the effect of decreasing common stock and increasing additional paid in capital by $3.8 million, $3.4 million, and $3.2 million as of December 31, 2016 and 2015 and January 1, 2015, respectively. Each affected individual line item within the consolidated statements of stockholders’ deficit relating to issuances of common shares for any reason and the return of loaned common stock in the years ended December 31, 2016 and 2015 have likewise been revised to decrease the common stock and increase the additional paid in capital attributable to each such transaction. 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 — 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

Business — MannKind Corporation and Subsidiaries (the “Company”) is a biopharmaceutical company focused on the development and commercialization of inhaled therapeutic products for diseases such as diabetes and pulmonary arterial hypertension. The Company’s only approved product, Afrezza (insulin human) inhalation powder, is a rapid-acting inhaled insulin that was approved by the U.S. Food and Drug Administration (the “FDA”) in June of 2014 to improve glycemic control in adults with diabetes. Afrezza became available by prescription in U.S. retail pharmacies in February 2015. Pursuant to a license and collaboration agreement (the “Sanofi License Agreement”) between the Company and Sanofi-Aventis U.S. LLC (“Sanofi”). Sanofi was responsible for global commercial, regulatory and development activities associated with Afrezza from August 2014 to April 2016. After a transition period during which Sanofi continued to fulfill orders for Afrezza, the Company assumed responsibility for worldwide development and commercialization of Afrezza and the Company began distributing MannKind-branded Afrezza to wholesalers in July 2016. During the second half of 2016, the Company utilized a contract sales organization to promote Afrezza while the Company focused its internal resources on establishing a channel strategy, entering into distribution agreements and developing co-pay assistance programs, a voucher program, data agreements and payor relationships. In early 2017, the Company recruited its own specialty sales force to promote Afrezza to endocrinologists and certain high-prescribing primary care physicians. The Company’s current strategy for future commercialization of Afrezza outside of the United States, subject to receipt of the necessary foreign regulatory approvals, is to seek and establish regional partnerships in foreign jurisdictions where there are appropriate commercial opportunities.

Basis of Presentation - The accompanying consolidated financial statements have been prepared assuming that the Company will continue as a going concern which contemplates the realization of assets and satisfaction of liabilities in the normal course of business. The Company is not currently profitable and has rarely generated positive net cash flow from operations. As of December 31, 2017, the Company had an accumulated deficit of $(2.9) billion.

At December 31, 2017, the Company’s capital resources consisted of cash and cash equivalents of $43.9 million. The Company expects to continue to incur significant expenditures to support commercial manufacturing, sales and marketing of Afrezza and the development of product candidates in the Company’s pipeline. 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”) that resulted in the issuance of 9.75% Senior Convertible Notes due 2019 (“2019 notes”) and the First Amendment to Facility Agreement and Registration Rights Agreement (the “First Amendment”) that resulted in the issuance of an additional tranche of 8.75% Senior Convertible Notes due 2019 (“Tranche B notes”) (see Note 7 — Borrowings) requires the Company to maintain at least $25.0 million in cash and cash equivalents or available borrowings under the loan arrangement, dated as of October 2, 2007, between the Company and The Mann Group LLC (“The Mann Group”) (as amended, restated, or otherwise modified as of the date hereof, “The Mann Group Loan Arrangement”), as of the last day of each fiscal quarter. On June 29, 2017, the Company entered into an Exchange and Third Amendment to the Facility Agreement (the “Third Amendment”) with Deerfield which, among other things, amended such financial covenant to provide that, if certain conditions are met, then the obligation to maintain at least $25.0 million in cash as of the end of each quarter will be reduced to $10.0 million as of August 31, 2017, September 30, 2017, October 31, 2017 and December 31, 2017 if certain conditions were met (see Note 7 — Borrowings). We met the conditions at each of these month-ends.

As of December 31, 2017, the Company has $157.8 million principal amount of outstanding borrowings. The Company has entered into certain transaction related to these borrowings during 2017 and 2018 that are more fully described in Note 6 - Related Party Agreements, Note 7 – Borrowings and Note 20 – Subsequent Events.

The Company’s available cash and financing sources will not be sufficient to meet its current and anticipated cash requirements, accordingly, these factors, among others, raise substantial doubt about the Company’s ability to continue as a going concern.

The Company plans to raise additional capital, whether through a sale of equity or debt securities, a strategic business collaboration with another 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. The Company cannot provide assurances that such additional capital will be available on acceptable terms or at all. Successful completion of these plans is dependent on factors outside of the Company’s control. As such, management cannot be certain that such plans will be effectively implemented within one year after the date that the financial statements are issued. These factors raise 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 this uncertainty.

Reverse Stock Split - On March 1, 2017, following stockholder approval, the Company’s board of directors approved a 1-for-5 reverse stock split of its outstanding common stock. On March 1, 2017, the Company filed with the Secretary of State of the State of Delaware a Certificate of Amendment of the Company’s Amended and Restated Certificate of Incorporation (the “Charter Amendment”) to effect the 1-for-5 reverse stock split of the Company’s outstanding common stock (the “Reverse Stock Split”) and to reduce the authorized number of shares of the Company’s common stock from 700,000,000 to 140,000,000 shares. The Company’s common stock began trading on the NASDAQ Global Market on a split-adjusted basis when the market opened on March 3, 2017. As a result, prior to March 3, 2017, all common stock share amounts included in these consolidated financial statements have been retroactively reduced by a factor of five, and all common stock per share amounts have been increased by a factor of five, with the exception of the Company’s common stock par value.

Correction of an Immaterial Error — Subsequent to the issuance of the Company’s financial statements for the year ended December 31, 2016 on Form 10-K, the Company determined that the common stock par value as of December 31, 2016 should not have been retrospectively adjusted for the impact of the reverse stock split on March 3, 2017 as described above. Management evaluated the materiality of the errors from a quantitative and qualitative perspective and concluded that this adjustment was not material to the Company’s previously issued financial statements. The Company has elected to revise the historical consolidated financial information presented herein in the consolidated balance sheet and statements of stockholders’ deficit to reflect the correction of this error for the prior periods presented. Since the revisions were not material, no amendments to previously filed reports were required. The revisions had the effect of decreasing common stock and increasing additional paid in capital by $3.8 million, $3.4 million, and $3.2 million as of December 31, 2016 and 2015 and January 1, 2015, respectively. Each affected individual line item within the consolidated statements of stockholders’ deficit relating to issuances of common shares for any reason and the return of loaned common stock in the years ended December 31, 2016 and 2015 have likewise been revised to decrease the common stock and increase the additional paid in capital attributable to each such transaction.

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 — 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.