Stockholders' Equity (Deficit)	9 Months Ended
Mar. 31, 2018
Stockholders' Equity (Deficit)
Stockholders' Equity (Deficit)	7. Stockholders’ Equity (Deficit) At the June 29, 2017 Special Meeting, the Company’s stockholders approved the amendment and restatement of the Company’s Certificate of Incorporation to increase the maximum number of shares of the Company’s stock authorized up to 260,000,000 shares of stock consisting of 250,000,000 shares of common stock and 10,000,000 shares of preferred stock, (the “Charter Amendment”). Previously the Company’s Certificate of Incorporation authorized up to 165,000,000 shares of capital stock, consisting of 155,000,000 shares of common stock and 10,000,000 shares of preferred stock. Preferred Stock The Certificate of Incorporation of the Company authorizes 10,000,000 shares of preferred stock, $.01 par value per share. The preferred stock may be issued from time to time in one or more series, with such distinctive serial designations, rights and preferences as shall be determined by the Board of Directors. On May 10, 2017, the Company issued in a private placement 1,000,000 shares (the “Preferred Shares”) of the Company’s Series A-1 Convertible Preferred Stock at a price of $125 per share for gross proceeds to the Company of $125.0 million, before deducting fees and expenses. Each Preferred Share was exchanged into 23.10536 shares of common stock (or an aggregate of 23,105,348 shares of common stock). The exchange price per share of common stock was $5.41. Following the June 29, 2017 Special Meeting and filing the Charter Amendment with the State of Delaware, the Company had authorized a sufficient number of unreserved shares of common stock to permit the exchange of the Preferred Shares. On July 31, 2017, the Company filed a registration statement on Form S-3 to register for resale the 23,105,348 shares of the Company’s common stock issuable upon the exchange of the Series A-1 Convertible Preferred Stock. The Preferred Shares converted to shares of common stock on August 24, 2017. The registration statement was declared effective on September 19, 2017. Common stock On January 8, 2018, the Company announced that it had agreed to sell tiered, sales-based royalty rights on global net sales of sacituzumab govitecan to RPI Finance Trust, a Delaware statutory trust (“RPI”) for $175.0 million. Simultaneously, the Company also entered into a common stock purchase agreement with RPI pursuant to which the Company, in a private placement, issued and sold to RPI 4,373,178 shares (the “Shares”) of the Company’s Common Stock, at a price of $17.15 per share for gross proceeds to the Company of $75.0 million before deducting fees and expenses. The Shares were offered, issued and sold in reliance upon the exemption from the registration requirements of the Securities Act of 1933, as amended (the “Securities Act”), set forth under Section 4(a)(2) of the Securities Act relating to sales by an issuer not involving any public offering and in reliance on similar exemptions under applicable state laws. RPI represented that it is an accredited investor and that it acquired the Shares for investment purposes only and not with a view to any resale, distribution or other disposition of such securities in violation of the United States federal securities laws. On December 5, 2017, Seattle Genetics exercised the Warrants they held in full to acquire 8,655,804 shares of Common Stock for an aggregate purchase price of $42.4 million. On October 11, 2016, the Company completed an underwritten public offering of 10 million shares of its common stock and accompanying warrants to purchase 10 million shares of common stock at a purchase price of $3.00 per unit, comprised of one share of common stock and one warrant. The Company received gross and net proceeds of $30.0 million and approximately $28.6 million, respectively after deducting the underwriting discounts and commissions and estimated expenses related to the offering payable. The warrants became exercisable nine months following the date of issuance, and will expire on the second anniversary of the date of issuance and have an exercise price of $3.75. On the date of issuance, the fair value of these warrants was determined to be $7.3 million and recognized as a liability. The warrants under certain situations require cash settlement by the Company. On July 18, 2017, September 1, 2017, December 14, 2017, and February 22, 2018, 900,000, 675,000, 575,000, and 1,400,00 warrants were exercised, respectively. The fair value of the 3,550,000 exercised warrants increased $14.6 million from June 30, 2017 to the dates of exercise which has been recognized in the accompanying condensed consolidated statements of comprehensive loss.

7. Stockholders’ Equity (Deficit)

At the June 29, 2017 Special Meeting, the Company’s stockholders approved the amendment and restatement of the Company’s Certificate of Incorporation to increase the maximum number of shares of the Company’s stock authorized up to 260,000,000 shares of stock consisting of 250,000,000 shares of common stock and 10,000,000 shares of preferred stock, (the “Charter Amendment”). Previously the Company’s Certificate of Incorporation authorized up to 165,000,000 shares of capital stock, consisting of 155,000,000 shares of common stock and 10,000,000 shares of preferred stock.

Preferred Stock

The Certificate of Incorporation of the Company authorizes 10,000,000 shares of preferred stock, $.01 par value per share. The preferred stock may be issued from time to time in one or more series, with such distinctive serial designations, rights and preferences as shall be determined by the Board of Directors.

On May 10, 2017, the Company issued in a private placement 1,000,000 shares (the “Preferred Shares”) of the Company’s Series A-1 Convertible Preferred Stock at a price of $125 per share for gross proceeds to the Company of $125.0 million, before deducting fees and expenses. Each Preferred Share was exchanged into 23.10536 shares of common stock (or an aggregate of 23,105,348 shares of common stock). The exchange price per share of common stock was $5.41.

Following the June 29, 2017 Special Meeting and filing the Charter Amendment with the State of Delaware, the Company had authorized a sufficient number of unreserved shares of common stock to permit the exchange of the Preferred Shares. On July 31, 2017, the Company filed a registration statement on Form S-3 to register for resale the 23,105,348 shares of the Company’s common stock issuable upon the exchange of the Series A-1 Convertible Preferred Stock. The Preferred Shares converted to shares of common stock on August 24, 2017. The registration statement was declared effective on September 19, 2017.

Common stock

On January 8, 2018, the Company announced that it had agreed to sell tiered, sales-based royalty rights on global net sales of sacituzumab govitecan to RPI Finance Trust, a Delaware statutory trust (“RPI”) for $175.0 million. Simultaneously, the Company also entered into a common stock purchase agreement with RPI pursuant to which the Company, in a private placement, issued and sold to RPI 4,373,178 shares (the “Shares”) of the Company’s Common Stock, at a price of $17.15 per share for gross proceeds to the Company of $75.0 million before deducting fees and expenses.

The Shares were offered, issued and sold in reliance upon the exemption from the registration requirements of the Securities Act of 1933, as amended (the “Securities Act”), set forth under Section 4(a)(2) of the Securities Act relating to sales by an issuer not involving any public offering and in reliance on similar exemptions under applicable state laws. RPI represented that it is an accredited investor and that it acquired the Shares for investment purposes only and not with a view to any resale, distribution or other disposition of such securities in violation of the United States federal securities laws.

On December 5, 2017, Seattle Genetics exercised the Warrants they held in full to acquire 8,655,804 shares of Common Stock for an aggregate purchase price of $42.4 million.

On October 11, 2016, the Company completed an underwritten public offering of 10 million shares of its common stock and accompanying warrants to purchase 10 million shares of common stock at a purchase price of $3.00 per unit, comprised of one share of common stock and one warrant. The Company received gross and net proceeds of $30.0 million and approximately $28.6 million, respectively after deducting the underwriting discounts and commissions and estimated expenses related to the offering payable. The warrants became exercisable nine months following the date of issuance, and will expire on the second anniversary of the date of issuance and have an exercise price of $3.75. On the date of issuance, the fair value of these warrants was determined to be $7.3 million and recognized as a liability. The warrants under certain situations require cash settlement by the Company. On July 18, 2017, September 1, 2017, December 14, 2017, and February 22, 2018, 900,000, 675,000, 575,000, and 1,400,00 warrants were exercised, respectively. The fair value of the 3,550,000 exercised warrants increased $14.6 million from June 30, 2017 to the dates of exercise which has been recognized in the accompanying condensed consolidated statements of comprehensive loss.