License and Collaboration Agreements	9 Months Ended
Mar. 31, 2016
License and Collaboration Agreements [Abstract]
License and Collaboration Agreements	10.License and Collaboration Agreements The Bayer Group (formerly Algeta ASA) In fiscal 2013 the Company entered into a collaboration agreement, referred to herein as the Collaboration Agreement, with Algeta ASA (subsequently acquired by The Bayer Group “Bayer”), for the development of epratuzumab to be conjugated with Algeta’s proprietary thorium-227 alpha-pharmaceutical payload. Under the terms of the Collaboration Agreement, the Company manufactured and supplied clinical-grade epratuzumab to Bayer, which has rights to evaluate the potential of a Targeted Thorium Conjugate (TTC), linking thorium-227 to epratuzumab, for the treatment of patients with cancer. Bayer has the right to terminate the Collaboration Agreement with three months prior written notice, subject to certain provisions. Bayer will fund all non-clinical and clinical development costs up to the end of Phase 1 clinical testing. Upon successful completion of Phase 1 testing, the parties shall negotiate terms for a license agreement at Bayer’s request. The Company and Bayer have agreed to certain parameters in the Collaboration Agreement. Under the terms of the Collaboration Agreement, as amended, Immunomedics received an upfront cash payment and other payments aggregating $6.0 million, which have been recognized in prior periods upon the Company fulfilling its obligations under the Collaboration Agreement. For the year ended June 30, 2015, the Company recognized $1.0 million in license and other revenue for the completion of the clinical development milestone as described in the Collaboration Agreement, which required the shipment of sufficient quantities of clinical grade material to Bayer to complete their Phase 1 clinical trial. In addition, in January 2016 and 2015, the Company recorded revenue of $0.3 million representing an anniversary payment under the agreement. The contract provides for the Company to receive one more similar payment of $0.3 million, representing “anniversary payment” over the next year. UCB, S.A. On May 9, 2006, the Company entered into an agreement with UCB, S.A. referred to herein as UCB, providing UCB an exclusive worldwide license to develop, manufacture, market and sell epratuzumab for the treatment of all non-cancer indications referred to herein as the UCB Agreement. On December 27, 2011, the Company entered into the Amendment Agreement with UCB which provided UCB the right to sublicense epratuzumab, subject to obtaining the Company’s prior consent, to a third party for the United States and certain other territories. The Company also issued to UCB on December 27, 2011 a 5-year warrant to purchase one million shares of the Company’s common stock, par value $0.01 per share, at an exercise price of $8.00 per share. In exchange for the right to sublicense its rights in epratuzumab to a third party and the warrant issuance, the Company received a non-refundable cash payment of $30.0 million in January 2012. Further, under the terms of the Amendment Agreement, UCB surrendered its buy-in right with respect to epratuzumab in the field of oncology, which had been granted under the UCB Agreement. UCB has not executed a sublicense agreement with a third-party. On July 28, 2015, UCB announced that the two Phase 3 EMBODY™ clinical trials for epratuzumab in SLE did not meet the primary clinical efficacy endpoints in either dose in both studies. On February 25, 2016, UCB notified the Company that it has ceased all Development (as defined in the Agreement) of the Licensed Compound (as defined in the Agreement) and would be terminating the Agreement effective as of March 26, 2016. As a result of the Agreement’s termination, all rights to the Licensed Product revert to the Company and the parties must cooperate to transition such rights back to the Company. The 5-year warrant to purchase one million shares of the Company’s common stock, par value $0.01 per share, at an exercise price of $8.00 per share expires December 27, 2016. The parties have begun discussions regarding the transition of the Licensed Product back to the Company.

10.License and Collaboration Agreements

The Bayer Group (formerly Algeta ASA)

In fiscal 2013 the Company entered into a collaboration agreement, referred to herein as the Collaboration Agreement, with Algeta ASA (subsequently acquired by The Bayer Group “Bayer”), for the development of epratuzumab to be conjugated with Algeta’s proprietary thorium-227 alpha-pharmaceutical payload. Under the terms of the Collaboration Agreement, the Company manufactured and supplied clinical-grade epratuzumab to Bayer, which has rights to evaluate the potential of a Targeted Thorium Conjugate (TTC), linking thorium-227 to epratuzumab, for the treatment of patients with cancer. Bayer has the right to terminate the Collaboration Agreement with three months prior written notice, subject to certain provisions. Bayer will fund all non-clinical and clinical development costs up to the end of Phase 1 clinical testing. Upon successful completion of Phase 1 testing, the parties shall negotiate terms for a license agreement at Bayer’s request. The Company and Bayer have agreed to certain parameters in the Collaboration Agreement. Under the terms of the Collaboration Agreement, as amended, Immunomedics received an upfront cash payment and other payments aggregating $6.0 million, which have been recognized in prior periods upon the Company fulfilling its obligations under the Collaboration Agreement.

For the year ended June 30, 2015, the Company recognized $1.0 million in license and other revenue for the completion of the clinical development milestone as described in the Collaboration Agreement, which required the shipment of sufficient quantities of clinical grade material to Bayer to complete their Phase 1 clinical trial. In addition, in January 2016 and 2015, the Company recorded revenue of $0.3 million representing an anniversary payment under the agreement. The contract provides for the Company to receive one more similar payment of $0.3 million, representing “anniversary payment” over the next year.

UCB, S.A.

On May 9, 2006, the Company entered into an agreement with UCB, S.A. referred to herein as UCB, providing UCB an exclusive worldwide license to develop, manufacture, market and sell epratuzumab for the treatment of all non-cancer indications referred to herein as the UCB Agreement. On December 27, 2011, the Company entered into the Amendment Agreement with UCB which provided UCB the right to sublicense epratuzumab, subject to obtaining the Company’s prior consent, to a third party for the United States and certain other territories.

The Company also issued to UCB on December 27, 2011 a 5-year warrant to purchase one million shares of the Company’s common stock, par value $0.01 per share, at an exercise price of $8.00 per share. In exchange for the right to sublicense its rights in epratuzumab to a third party and the warrant issuance, the Company received a non-refundable cash payment of $30.0 million in January 2012. Further, under the terms of the Amendment Agreement, UCB surrendered its buy-in right with respect to epratuzumab in the field of oncology, which had been granted under the UCB Agreement. UCB has not executed a sublicense agreement with a third-party.

On July 28, 2015, UCB announced that the two Phase 3 EMBODY™ clinical trials for epratuzumab in SLE did not meet the primary clinical efficacy endpoints in either dose in both studies. On February 25, 2016, UCB notified the Company that it has ceased all Development (as defined in the Agreement) of the Licensed Compound (as defined in the Agreement) and would be terminating the Agreement effective as of March 26, 2016.

As a result of the Agreement’s termination, all rights to the Licensed Product revert to the Company and the parties must cooperate to transition such rights back to the Company. The 5-year warrant to purchase one million shares of the Company’s common stock, par value $0.01 per share, at an exercise price of $8.00 per share expires December 27, 2016. The parties have begun discussions regarding the transition of the Licensed Product back to the Company.