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Stockholders' Equity	9 Months Ended
	Sep. 30, 2020
Equity [Abstract]
Stockholders' Equity	8. Stockholders’ Equity In August 2020, the Company entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Queen Merger Sub, Inc. (“Merger Sub”), CerSci Therapeutics Incorporated (“CerSci”), and Shareholder Representative Services LLC, and on the same day, the transactions contemplated by the Merger Agreement closed and Merger Sub merged with and into CerSci, with CerSci as the surviving corporation and the Company’s wholly owned subsidiary. Approximately 1.2 million shares of the Company’s common stock with a value of $44.3 million were issued to CerSci’s former equityholders. The Company filed a registration statement on Form S-3 with the SEC to register the resale of the shares of the Company’s common stock issued in connection with its acquisition of CerSci. In September 2019, the Company raised net proceeds of approximately $271.5 million from the sale of 7,187,500 shares of its common stock in a follow-on public offering, including 937,500 shares sold pursuant to the exercise in full of the underwriters’ option to purchase additional shares.

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No definition available.

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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://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(e)(1))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-URI http://asc.fasb.org/topic&trid=2208762

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