Nature of Operations	9 Months Ended
Sep. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations	1. Nature of Operations Description of the Business KaloBios Pharmaceuticals, Inc. (the “Company”) is a biopharmaceutical company focused on developing medicines for patients with neglected and rare diseases, with an ancillary focus on pediatric conditions, and on executing its Responsible Pricing Model in the commercialization of the Company’s product candidates that may be approved. The Company’s lead product candidate is benznidazole for the treatment of Chagas disease, a parasitic illness that can lead to long-term heart, intestinal and neurological problems. As more fully described in note 10, the Company acquired certain worldwide rights to benznidazole on June 30, 2016. The Company is developing one of its proprietary monoclonal antibodies, lenzilumab (formerly known as KB003), for the treatment of chronic myelomonocytic leukemia and potentially for the treatment of juvenile myelomonocytic leukemia, both of which are rare hematologic cancers with high unmet medical need. The Company is exploring development of another of its proprietary monoclonal antibodies, ifabotuzumab (formerly known as KB004), for the treatment of certain rare solid and hematologic cancers. With a focus on neglected, rare, and orphan diseases, the Company believes that it has the opportunity to benefit from various regulatory incentives, such as orphan drug exclusivity, breakthrough therapy designation, fast track designation, accelerated approval, priority review and priority review vouchers (“PRV”), where available, that provide for certain periods of exclusivity, expedited review and/or other benefits. The Company was incorporated on March 15, 2000 in California and reincorporated as a Delaware corporation in September 2001. All of the Company’s assets are located in California. Liquidity and Going Concern The Company has historically incurred significant losses and had an accumulated deficit of $200.5 million as of September 30, 2015. The Company has financed its operations primarily through the sale of equity securities, grants and the payments received under its agreements with Novartis Pharma AG and Sanofi Pasteur S.A. (“Sanofi”). The Company completed its initial public offering in February 2013. To date, none of the Company’s product candidates have been approved for sale and therefore the Company has not generated any revenue from product sales. Management expects operating losses to continue for the foreseeable future. As a result, the Company will continue to require additional capital through equity offerings, debt financing and/or payments under new or existing licensing or collaboration agreements. If sufficient funds are not available on acceptable terms when needed, the Company could be required to significantly reduce its operating expenses and delay, reduce the scope of, or eliminate one or more of its development programs. The Company’s ability to access capital when needed is not assured and, if not achieved on a timely basis when needed, could materially harm its business, financial condition and results of operations. These conditions raise substantial doubt about the Company’s ability to continue as a going concern. The Condensed Consolidated Financial Statements for the quarterly period ended September 30, 2015 were prepared on the basis of a going concern, which contemplates that the Company will be able to realize assets and discharge liabilities in the normal course of business. The ability of the Company to meet its total liabilities of $12.6 million at September 30, 2015, and to continue as a going concern is dependent upon the availability of future funding. The financial statements do not include any adjustments that might be necessary if the Company is unable to continue as a going concern. Basis of Presentation The accompanying interim unaudited Condensed Consolidated Financial Statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information and on a basis consistent with the annual consolidated financial statements and include all adjustments necessary for the presentation of the Company’s condensed consolidated financial position, results of operations and cash flows for the periods presented. The Condensed Consolidated Financial Statements include the accounts of the Company and its wholly owned subsidiaries. These financial statements have been prepared on a basis that assumes that the Company will continue as a going concern, which contemplates the realization of assets and the satisfaction of liabilities and commitments in the normal course of business. The December 31, 2014 Condensed Consolidated Balance Sheet was derived from the audited financial statements but does not include all disclosures required by GAAP. These interim financial results are not necessarily indicative of the results to be expected for the year ending December 31, 2015, or for any other future annual or interim period. The accompanying unaudited Condensed Consolidated Financial Statements should be read in conjunction with the audited consolidated financial statements and the related notes thereto included in the 2014 Annual Report. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts and disclosures reported in the Condensed Consolidated Financial Statements and accompanying notes. Actual results could differ materially from those estimates. The Company believes judgment is involved in determining the valuation of the financing derivative, the fair value-based measurement of stock-based compensation, accruals and warrant valuations. The Company evaluates its estimates and assumptions as facts and circumstances dictate. As future events and their effects cannot be determined with precision, actual results could differ from these estimates and assumptions, and those differences could be material to the Condensed Consolidated Financial Statements.

1. Nature of Operations

Description of the Business

KaloBios Pharmaceuticals, Inc. (the “Company”) is a biopharmaceutical company focused on developing medicines for patients with neglected and rare diseases, with an ancillary focus on pediatric conditions, and on executing its Responsible Pricing Model in the commercialization of the Company’s product candidates that may be approved. The Company’s lead product candidate is benznidazole for the treatment of Chagas disease, a parasitic illness that can lead to long-term heart, intestinal and neurological problems. As more fully described in note 10, the Company acquired certain worldwide rights to benznidazole on June 30, 2016. The Company is developing one of its proprietary monoclonal antibodies, lenzilumab (formerly known as KB003), for the treatment of chronic myelomonocytic leukemia and potentially for the treatment of juvenile myelomonocytic leukemia, both of which are rare hematologic cancers with high unmet medical need. The Company is exploring development of another of its proprietary monoclonal antibodies, ifabotuzumab (formerly known as KB004), for the treatment of certain rare solid and hematologic cancers. With a focus on neglected, rare, and orphan diseases, the Company believes that it has the opportunity to benefit from various regulatory incentives, such as orphan drug exclusivity, breakthrough therapy designation, fast track designation, accelerated approval, priority review and priority review vouchers (“PRV”), where available, that provide for certain periods of exclusivity, expedited review and/or other benefits.

The Company was incorporated on March 15, 2000 in California and reincorporated as a Delaware corporation in September 2001. All of the Company’s assets are located in California.

Liquidity and Going Concern

The Company has historically incurred significant losses and had an accumulated deficit of $200.5 million as of September 30, 2015. The Company has financed its operations primarily through the sale of equity securities, grants and the payments received under its agreements with Novartis Pharma AG and Sanofi Pasteur S.A. (“Sanofi”). The Company completed its initial public offering in February 2013. To date, none of the Company’s product candidates have been approved for sale and therefore the Company has not generated any revenue from product sales. Management expects operating losses to continue for the foreseeable future. As a result, the Company will continue to require additional capital through equity offerings, debt financing and/or payments under new or existing licensing or collaboration agreements. If sufficient funds are not available on acceptable terms when needed, the Company could be required to significantly reduce its operating expenses and delay, reduce the scope of, or eliminate one or more of its development programs. The Company’s ability to access capital when needed is not assured and, if not achieved on a timely basis when needed, could materially harm its business, financial condition and results of operations. These conditions raise substantial doubt about the Company’s ability to continue as a going concern.

The Condensed Consolidated Financial Statements for the quarterly period ended September 30, 2015 were prepared on the basis of a going concern, which contemplates that the Company will be able to realize assets and discharge liabilities in the normal course of business. The ability of the Company to meet its total liabilities of $12.6 million at September 30, 2015, and to continue as a going concern is dependent upon the availability of future funding. The financial statements do not include any adjustments that might be necessary if the Company is unable to continue as a going concern.

Basis of Presentation

The accompanying interim unaudited Condensed Consolidated Financial Statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information and on a basis consistent with the annual consolidated financial statements and include all adjustments necessary for the presentation of the Company’s condensed consolidated financial position, results of operations and cash flows for the periods presented. The Condensed Consolidated Financial Statements include the accounts of the Company and its wholly owned subsidiaries. These financial statements have been prepared on a basis that assumes that the Company will continue as a going concern, which contemplates the realization of assets and the satisfaction of liabilities and commitments in the normal course of business. The December 31, 2014 Condensed Consolidated Balance Sheet was derived from the audited financial statements but does not include all disclosures required by GAAP. These interim financial results are not necessarily indicative of the results to be expected for the year ending December 31, 2015, or for any other future annual or interim period. The accompanying unaudited Condensed Consolidated Financial Statements should be read in conjunction with the audited consolidated financial statements and the related notes thereto included in the 2014 Annual Report.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts and disclosures reported in the Condensed Consolidated Financial Statements and accompanying notes. Actual results could differ materially from those estimates. The Company believes judgment is involved in determining the valuation of the financing derivative, the fair value-based measurement of stock-based compensation, accruals and warrant valuations. The Company evaluates its estimates and assumptions as facts and circumstances dictate. As future events and their effects cannot be determined with precision, actual results could differ from these estimates and assumptions, and those differences could be material to the Condensed Consolidated Financial Statements.