Description of Business	12 Months Ended
Dec. 31, 2018
Accounting Policies [Abstract]
Description of Business	1. Description of Business Business — MannKind Corporation and its 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 2014 to improve glycemic control in adults with diabetes. Afrezza became available by prescription in United States retail pharmacies in February 2015. Currently, the Company promotes Afrezza to endocrinologists and certain high-prescribing primary care physicians in the United States through its specialty sales force. 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, 2018, the Company had an accumulated deficit of $2.9 billion. At December 31, 2018, the Company’s capital resources consisted of cash and cash equivalents of $71.2 million and $0.5 million of restricted cash. The Company expects to continue to incur significant expenditures to support commercial manufacturing, sales and marketing of Afrezza, collaboration work and the development of product candidates in the Company’s pipeline. The facility agreement (as amended, the “Facility Agreement”) with Deerfield Private Design Fund II, L.P. 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 8.75% Senior Convertible Notes due 2019 (“Tranche B notes”) (see Note 7 — Borrowings) requires the Company to maintain at least $20.0 million in cash and cash equivalents as of October 31, 2018 and December 31, 2018 and $25.0 million in cash and cash equivalents as of the end of each fiscal quarter after December 31, 2018. As of December 31, 2018, the Company had $101.7 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 and Note 7 – Borrowings. The Company’s currently available cash and financing sources will not be sufficient to continue to meet its current and anticipated cash requirements within one year from the date these financial statements were issued. The Company plans to raise additional capital, whether through a sale of equity or debt securities, strategic business collaboration agreements with other companies, 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. 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.

Description of Business

12 Months Ended

Dec. 31, 2018

1. Description of Business

Business — MannKind Corporation and its 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 2014 to improve glycemic control in adults with diabetes. Afrezza became available by prescription in United States retail pharmacies in February 2015. Currently, the Company promotes Afrezza to endocrinologists and certain high-prescribing primary care physicians in the United States through its specialty sales force.

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, 2018, the Company had an accumulated deficit of $2.9 billion.

At December 31, 2018, the Company’s capital resources consisted of cash and cash equivalents of $71.2 million and $0.5 million of restricted cash. The Company expects to continue to incur significant expenditures to support commercial manufacturing, sales and marketing of Afrezza, collaboration work and the development of product candidates in the Company’s pipeline. The facility agreement (as amended, the “Facility Agreement”) with Deerfield Private Design Fund II, L.P. 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 8.75% Senior Convertible Notes due 2019 (“Tranche B notes”) (see Note 7 — Borrowings) requires the Company to maintain at least $20.0 million in cash and cash equivalents as of October 31, 2018 and December 31, 2018 and $25.0 million in cash and cash equivalents as of the end of each fiscal quarter after December 31, 2018.

As of December 31, 2018, the Company had $101.7 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 and Note 7 – Borrowings.

The Company’s currently available cash and financing sources will not be sufficient to continue to meet its current and anticipated cash requirements within one year from the date these financial statements were issued. The Company plans to raise additional capital, whether through a sale of equity or debt securities, strategic business collaboration agreements with other companies, 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.

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.