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Stockholders' Equity | 3 Months Ended
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Mar. 31, 2019
Equity [Abstract] |
Stockholders' Equity | Stockholders' Equity During the three months ended March 31, 2019, 101,787 warrants were exercised at $7.98 per share of common stock resulting in gross cash proceeds of $0.8 million. As discussed in ''— Note 5. Debt'' during the first quarter of 2019, the Company entered into separate, privately negotiated exchange agreements with a limited number of holders (the "Holders") of the Convertible Notes. Under the terms of the exchange agreements (the "Exchange Agreements"), the Holders agreed to exchange an aggregate principal amount of approximately $219.3 million of Convertible Notes held by them in exchange for an aggregate of approximately 39.0 million shares of the our common stock, par value $0.01 per share. As further discussed in "— Note 8. Assets and Liabilities Measured at Fair Value," the Company reached a clinical milestone, which was the dosing of the first patient in a Phase 3 study, related to the contingent consideration from the acquisition of Callidus. The milestone for this event was $9.0 million which was paid in Company stock during the three months ended March 31, 2019, resulting in $9.3 million impact on stockholder's equity.

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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