Business Overview, Basis of Presentation and Recent Accounting Pronouncements	3 Months Ended
Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business Overview, Basis of Presentation and Recent Accounting Pronouncements	Business Overview, Basis of Presentation and Recent Accounting Pronouncements Business Overview Immunomedics, Inc., a Delaware corporation (“Immunomedics” or the “Company”), is a clinical-stage biopharmaceutical company that develops monoclonal antibody-based products for the targeted treatment of cancer. Immunomedics manages its operations as one line of business of researching, developing, manufacturing and marketing biopharmaceutical products, particularly antibody-based products for patients with difficult to treat solid tumor and blood cancers. The Company currently reports as a single industry segment with substantially all business conducted in the United States ("United States"). Immunomedics conducts its research activities in the United States and runs its development studies in the United States and selected European countries. Our corporate objective is to become a fully-integrated biopharmaceutical company and a leader in the field of antibody-drug conjugates (“ADCs”). To that end, our immediate priority is to commercialize our most advanced ADC product candidate, sacituzumab govitecan (“IMMU-132”), beginning in the United States, with metastatic triple-negative breast cancer (“mTNBC”) as the first indication. On May 21, 2018, we submitted a Biologics License Application (“BLA”) to the FDA for sacituzumab govitecan for the treatment of patients with mTNBC who have received at least two prior therapies for metastatic disease. On July 18, 2018, we received notification from the Food and Drug Administration ("FDA") that the BLA was accepted for filing and granted Priority Review with a PDUFA target action date of January 18, 2019. If approved, sacituzumab govitecan would be the first and only ADC approved for the treatment of mTNBC. Basis of Presentation The accompanying unaudited condensed consolidated financial statements of Immunomedics, which incorporate our subsidiaries, have been prepared in accordance with United States generally accepted accounting principles (“GAAP”), for interim financial information and the instructions to the Quarterly Report on Form 10‑Q and Regulation S‑X. Accordingly, the statements do not include all of the information and footnotes required by GAAP for complete annual financial statements. With respect to the financial information for the interim periods included in this Quarterly Report on Form 10-Q, which is unaudited, management believes that all adjustments (consisting of normal recurring accruals), considered necessary for a fair presentation of the results for such interim periods have been included. Operating results for the three-month period ended September 30, 2018, are not necessarily indicative of the results that may be expected for the full fiscal year ending June 30, 2019, or any other period. The preparation of the condensed consolidated financial statements requires management to make estimates and assumptions that affect reported amounts and disclosures. Actual results could differ from those estimates. Recent Accounting Pronouncements Accounting Pronouncements adopted during the year: In November 2016, the FASB issued Accounting Standards Update ("ASU") 2016-18 "Statement of Cash Flows (Topic 230): Restricted Cash.” The amendments in this update require that cash and cash equivalent balances in a statement of cash flows include those amounts deemed to be restricted cash and restricted cash equivalents. ASU 2016-18 is effective for annual reporting periods beginning after December 15, 2017, and early adoption is permitted. We adopted the amendments in this accounting standard update in the first quarter of fiscal 2019 on a retrospective basis resulting in an immaterial impact to our condensed consolidated financial statements. In August 2016, the FASB issued ASU 2016-15, “Statement of Cash Flows: Clarification of Certain Cash Receipts and Cash Payments,” which eliminates the diversity in practice related to the classification of certain cash receipts and payments in the statement of cash flows, by adding or clarifying guidance on eight specific cash flow issues. ASU 2016-15 is effective for annual and interim reporting periods beginning after December 15, 2017, and early adoption is permitted. ASU 2016-15 provides for retrospective application for all periods presented. ASU 2016-15 was effective for us in our first quarter of fiscal 2019 and did not result in any changes to the presentation of our Consolidated Statement of Cash Flows upon adoption. In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers (Topic 606),” and has subsequently issued a number of amendments to Topic 606. On July 1, 2018, we adopted Topic 606 using the modified retrospective method. The adoption of Topic 606 did not have a material impact to our condensed consolidated financial statements. Accounting Pronouncements yet to be adopted: In August 2018, the FASB issued ASU 2018-13, "Fair Value measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement," to no longer require public companies to disclose transfers between Level 1 and Level 2 of the fair value hierarchy, and to require disclosure about the range and weighted average used to develop significant unobservable inputs for Level 3 fair value measurements. The guidance is effective for fiscal years beginning after December 15, 2019, and for interim periods within those fiscal years. Entities are permitted to early adopt either the entire standard or only the provisions that eliminate or modify the requirements. We are currently assessing the impact of ASU 2018-13. In June 2018, the FASB issued ASU 2018-07, "Compensation-Stock Compensation," to improve the usefulness of information provided to users of financial statements while reducing cost and complexity in financial reporting and provide guidance aligning the measurement and classification for share-based payments to nonemployees with the guidance for share-based payments to employees. Under the guidance, the measurement of equity-classified nonemployee awards will be fixed at the grant date. This standard is effective for fiscal years beginning after December 15, 2018, and interim periods within those annual periods. Early adoption is permitted, but no earlier than an entity's adoption date of Topic 606. We are currently assessing the impact of ASU 2018-07. In February 2016, the FASB issued ASU 2016-02, “Leases,” and issued subsequent amendments to the initial guidance contained within ASU 2017-13. This standard requires a lessee to record the assets and liabilities for the rights and obligations created by lease terms of more than 12 months on the balance sheet. The amendments in this update are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and early application is permitted. We are currently assessing the impact of ASU 2016-02.

Business Overview, Basis of Presentation and Recent Accounting Pronouncements

Business Overview

Immunomedics, Inc., a Delaware corporation (“Immunomedics” or the “Company”), is a clinical-stage biopharmaceutical company that develops monoclonal antibody-based products for the targeted treatment of cancer. Immunomedics manages its operations as one line of business of researching, developing, manufacturing and marketing biopharmaceutical products, particularly antibody-based products for patients with difficult to treat solid tumor and blood cancers. The Company currently reports as a single industry segment with substantially all business conducted in the United States ("United States"). Immunomedics conducts its research activities in the United States and runs its development studies in the United States and selected European countries. Our corporate objective is to become a fully-integrated biopharmaceutical company and a leader in the field of antibody-drug conjugates (“ADCs”). To that end, our immediate priority is to commercialize our most advanced ADC product candidate, sacituzumab govitecan (“IMMU-132”), beginning in the United States, with metastatic triple-negative breast cancer (“mTNBC”) as the first indication. On May 21, 2018, we submitted a Biologics License Application (“BLA”) to the FDA for sacituzumab govitecan for the treatment of patients with mTNBC who have received at least two prior therapies for metastatic disease. On July 18, 2018, we received notification from the Food and Drug Administration ("FDA") that the BLA was accepted for filing and granted Priority Review with a PDUFA target action date of January 18, 2019. If approved, sacituzumab govitecan would be the first and only ADC approved for the treatment of mTNBC.

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements of Immunomedics, which incorporate our subsidiaries, have been prepared in accordance with United States generally accepted accounting principles (“GAAP”), for interim financial information and the instructions to the Quarterly Report on Form 10‑Q and Regulation S‑X. Accordingly, the statements do not include all of the information and footnotes required by GAAP for complete annual financial statements. With respect to the financial information for the interim periods included in this Quarterly Report on Form 10-Q, which is unaudited, management believes that all adjustments (consisting of normal recurring accruals), considered necessary for a fair presentation of the results for such interim periods have been included. Operating results for the three-month period ended September 30, 2018, are not necessarily indicative of the results that may be expected for the full fiscal year ending June 30, 2019, or any other period. The preparation of the condensed consolidated financial statements requires management to make estimates and assumptions that affect reported amounts and disclosures. Actual results could differ from those estimates.

Recent Accounting Pronouncements

Accounting Pronouncements adopted during the year:

In November 2016, the FASB issued Accounting Standards Update ("ASU") 2016-18 "Statement of Cash Flows (Topic 230): Restricted Cash.” The amendments in this update require that cash and cash equivalent balances in a statement of cash flows include those amounts deemed to be restricted cash and restricted cash equivalents. ASU 2016-18 is effective for annual reporting periods beginning after December 15, 2017, and early adoption is permitted. We adopted the amendments in this accounting standard update in the first quarter of fiscal 2019 on a retrospective basis resulting in an immaterial impact to our condensed consolidated financial statements.

In August 2016, the FASB issued ASU 2016-15, “Statement of Cash Flows: Clarification of Certain Cash Receipts and Cash Payments,” which eliminates the diversity in practice related to the classification of certain cash receipts and payments in the statement of cash flows, by adding or clarifying guidance on eight specific cash flow issues. ASU 2016-15 is effective for annual and interim reporting periods beginning after December 15, 2017, and early adoption is permitted. ASU 2016-15 provides for retrospective application for all periods presented. ASU 2016-15 was effective for us in our first quarter of fiscal 2019 and did not result in any changes to the presentation of our Consolidated Statement of Cash Flows upon adoption.

In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers (Topic 606),” and has subsequently issued a number of amendments to Topic 606. On July 1, 2018, we adopted Topic 606 using the modified retrospective method. The adoption of Topic 606 did not have a material impact to our condensed consolidated financial statements.

Accounting Pronouncements yet to be adopted:

In August 2018, the FASB issued ASU 2018-13, "Fair Value measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement," to no longer require public companies to disclose transfers between Level 1 and Level 2 of the fair value hierarchy, and to require disclosure about the range and weighted average used to develop significant unobservable inputs for Level 3 fair value measurements. The guidance is effective for fiscal years beginning after December 15, 2019, and for interim periods within those fiscal years. Entities are permitted to early adopt either the entire standard or only the provisions that eliminate or modify the requirements. We are currently assessing the impact of ASU 2018-13.

In June 2018, the FASB issued ASU 2018-07, "Compensation-Stock Compensation," to improve the usefulness of information provided to users of financial statements while reducing cost and complexity in financial reporting and provide guidance aligning the measurement and classification for share-based payments to nonemployees with the guidance for share-based payments to employees. Under the guidance, the measurement of equity-classified nonemployee awards will be fixed at the grant date. This standard is effective for fiscal years beginning after December 15, 2018, and interim periods within those annual periods. Early adoption is permitted, but no earlier than an entity's adoption date of Topic 606. We are currently assessing the impact of ASU 2018-07.

In February 2016, the FASB issued ASU 2016-02, “Leases,” and issued subsequent amendments to the initial guidance contained within ASU 2017-13. This standard requires a lessee to record the assets and liabilities for the rights and obligations created by lease terms of more than 12 months on the balance sheet. The amendments in this update are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and early application is permitted. We are currently assessing the impact of ASU 2016-02.