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Subsequent Events (Notes)
12 Months Ended
Dec. 31, 2019
Subsequent Event [Line Items]  
Subsequent Events
Subsequent Event

On February 14, 2020, the Company completed a public offering of its common stock pursuant to a shelf registration statement on Form S-3, which was filed on August 6, 2019 and declared effective by the SEC on August 21, 2019. The Company sold 10,299,769 shares of common stock at a price of $4.15 per share, including 1,299,769 shares of common stock pursuant to the partial exercise of the underwriters' option to purchase up to an additional 1,350,000 shares of common stock. Gross proceeds from the offering were $42.7 million.