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Preferred Stock | 3 Months Ended
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Mar. 31, 2020
Temporary Equity Disclosure [Abstract] |
Preferred Stock | Preferred Stock Preferred Stock In connection with the IPO, the Company's amended and restated certificate of incorporation became effective, which authorized the issuance of 225,000,000 shares of preferred stock with a par value of $0.001 per share with rights and preferences, including voting rights, designated from time to time by the Company's Board of Directors. Redeemable Convertible Preferred Stock Warrants In connection with the terms of a loan and security agreement entered into by the Company in April 2011, the Company issued a warrant to purchase 59,140 shares of Series B redeemable convertible preferred stock upon execution of the agreement, an additional warrant to purchase 94,510 shares of Series B redeemable convertible preferred stock in connection with the Company’s drawdown of $1.6 million under the facility during October 2011, and a warrant to purchase 23,760 shares of Series B redeemable convertible preferred stock in connection with the final drawdown of $0.4 million in January 2012. The warrants had an exercise price of $0.34 per share. The warrants were considered a liability and carried at fair value with any changes in fair value recognized in other income (expense), net in the condensed consolidated statements of operations. Upon completion of the IPO, the warrants to purchase Series B redeemable convertible preferred stock were automatically converted to warrants to purchase an equal number of shares of Class B common stock. As a result, the warrant liability was remeasured and reclassified to additional paid-in capital within stockholders' equity (deficit). In the year ended December 31, 2019, the warrants were exercised and such shares were settled via the net settlement method, resulting in the issuance of 174,347 shares of the Company's Class B common stock. During the three months ended March 31, 2019, the Company recorded a loss of $0.1 million related to the change in fair value of the redeemable convertible preferred stock warrants.

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