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Common and Preferred Stock | 6 Months Ended
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Jun. 30, 2020
Equity [Abstract] |
Common and Preferred Stock | 9. Common and Preferred Stock On May 21, 2020, the Company filed with the Secretary of State of the State of Delaware a Certificate of Amendment of its Amended and Restated Certificate of Incorporation to increase the authorized number of shares of the Company’s common stock from 280,000,000 to 400,000,000 shares. As of June 30, 2020 and December 31, 2019, 228,927,505 and 211,787,573 shares of common stock, respectively, were issued and outstanding and no shares of preferred stock were outstanding. In February 2018, the Company entered into a controlled equity offering sales agreement (the “CF Sales Agreement”) with Cantor Fitzgerald & Co. (“Cantor Fitzgerald”), as sales agent, pursuant to which the Company may offer and sell, from time to time, through Cantor Fitzgerald, shares of the Company’s common stock having an aggregate offering price of up to $50.0 million or such other amount as may be permitted by the CF Sales Agreement. Under the CF Sales Agreement, Cantor Fitzgerald may sell shares by any method deemed to be an “at the market offering” as defined in Rule 415 under the Securities Act of 1933, as amended. For the six months ended June 30, 2020, the Company sold an aggregate of 7,871,461 shares of the Company’s common stock at a weighted average purchase price of $1.64 per share for an aggregate gross proceeds of approximately $12.9 million pursuant to the CF Sales Agreement. In December 2018, the Company entered into an underwriting agreement with Leerink Partners LLC relating to the issuance and sale in a public offering of 26,666,667 shares of the Company’s common stock and warrants to purchase up to an aggregate of 26,666,667 shares of the Company’s common stock (the “December warrants”) at a combined purchase price of $1.50 per share and accompanying warrant. The shares of common stock and the December warrants were immediately separable. The December warrants were immediately exercisable at issuance at a price of $1.60 per share and had an expiry date of December 26, 2019. On December 26, 2019, 11,583,333 December warrants expired unexercised and 7,250,000 remained available for purchase at a price of $1.60 per share, which were subsequently exercised in June 2020. On June 24, 2020, the Company prepaid the June 2020 note with the issuance of 1,235,094 shares of the Company’s common stock, in accordance with the terms of the June 2020 note (See Note 6 – Borrowings).

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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 + Details
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