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Capitalization
3 Months Ended
Mar. 31, 2021
Stockholders' Equity Note [Abstract]  
Capitalization

6.        Capitalization

In August 2019, the Company entered into an At the Market Offering Sales Agreement (the “Sales Agreement”) with Cantor Fitzgerald and RBC Capital Markets, LLC (together, the “Sales Agents”), pursuant to which, the Company may offer and sell shares of its common stock, having an aggregate offering price of up to $125.0 million from time to time through the Sales Agents by any method that is deemed to be an “at the market offering” as defined in Rule 415(a)(4) promulgated under the Securities Act of 1933, as amended. During the three month period ending March 31, 2020, the Company issued and sold an aggregate of 262,205 shares of common stock pursuant to the Sales Agreement at a weighted average public offering price of $52.81 per share. During the three month period ending March 31, 2020, the Company received net proceeds of $13.5 million after deducting sales agents fees and commissions and other offering expenses payable by the Company.  No shares were sold during the three month period ending March 31, 2021. The remaining shares of the Company’s common stock available to be issued and sold, under the At the Market Offering, have an aggregate offering price of up to $93.0 million as of March 31, 2021.