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Common Stock | 12 Months Ended
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Dec. 31, 2020
Common Stock |
Common Stock | 11. Common Stock The voting, dividend, and liquidation rights of the holders of the common stock are subject to and qualified by the rights, powers, and preferences of holders of the preferred stock that may be issued from time to time. The common stock had the following characteristics as of December 31, 2020: Voting The holders of shares of common stock are entitled to one vote for each share of common stock held at any meeting of stockholders and at the time of any written action in lieu of a meeting. Dividends The holders of shares of common stock are entitled to receive dividends, if and when declared by the Company’s board of directors. Cash dividends may not be declared or paid to holders of shares of common stock until all unpaid dividends on the redeemable convertible preferred stock have been paid in accordance with their terms. No dividends have been declared or paid by the Company since its inception. 2013 Stock Incentive Plan In September 2013, the board of directors adopted the 2013 Stock Incentive Plan, which was subsequently amended (as amended, the “2013 Plan”), which provides for the grant of incentive stock options and nonqualified stock options or other awards including restricted stock awards, unrestricted stock awards, and restricted stock units to the Company’s employees, officers, directors, advisors, and consultants for the purchase of up to 1,057,692 shares of the Company’s common stock, which has been amended several times, and as of July 2015, a total of 6,317,769 shares were reserved. The terms of stock awards agreements, including vesting requirements, are determined by the board of directors and are subject to the provisions of the 2013 Plan. The stock options granted to employees generally vest over a four-year period and expire ten years from the date of grant. Certain awards contain performance based vesting criteria. There has only been one such award to date. Certain options provide for accelerated vesting in the event of a change in control, as defined in the applicable options. Awards granted to non-employee consultants generally vest monthly over a period of one to four years. In connection with the Company’s initial public offering (“IPO”), the Company’s board of directors determined to grant no further awards under the 2013 Plan. 2015 Stock Incentive Plan The Company’s board of directors adopted and the Company’s stockholders approved the 2015 stock incentive plan (the “2015 Plan”). The 2015 Plan provides for the grant of incentive stock options, nonstatutory stock options, restricted stock awards, restricted stock units, stock appreciation rights and other stock-based awards. The Company’s employees, officers, directors and consultants and advisors are eligible to receive awards under the 2015 Plan. The number of shares reserved for issuance under the 2015 Plan is subject to further increases for (a) any additional shares of the Company’s common stock subject to outstanding awards under the 2013 Plan that expire, terminate, or are otherwise surrendered, cancelled, forfeited, or repurchased by the Company at their original issuance price pursuant to a contractual repurchase right and (b) annual increases, to be added as of the first day of each fiscal year, from January 1, 2017 until, and including, January 1, 2026, equal to the lowest of 2,923,076 shares of common stock, 4% of the number of shares of common stock outstanding on such first day of the fiscal year in question and an amount determined by the Company’s board of directors. In January 2021, the shares under the 2015 Plan were increased by 2,507,552 shares pursuant to the annual increase described in the prior sentence. 2015 Employee Stock Purchase Plan The Company’s board of directors adopted and the Company’s stockholders approved the 2015 employee stock purchase plan (the “2015 ESPP”). The number of shares reserved for issuance under the 2015 ESPP is subject to annual increases, to be added as of the first day of each fiscal year, from January 1, 2017 until, and including, January 1, 2026, in an amount equal to the least of (a) 769,230 shares of common stock, (b) 1% of the total number of shares of common stock outstanding on the first day of the applicable year, and (c) an amount determined by the board of directors. The first offering under the 2015 ESPP opened on December 1, 2017. In January 2021, the shares under the 2015 ESPP Plan were increased by 626,888 shares pursuant to the annual increase described in the prior sentence. Inducement Awards From time to time the Company’s board of directors approves inducement awards to certain employees outside of the existing equity compensation plans in connection with such employees commencing employment with the Company. Inducement awards are typically a service-based option or a restricted stock unit and are subject to the Company’s typical vesting terms and the employee’s continued service relationship with the Company through the applicable vesting dates. In November 2020, the Company’s board of directors approved an inducement grant to the Company’s recently hired Chief Medical Officer, including an option to purchase up to 120,000 shares of the Company’s common stock and an award of 20,000 restricted stock units. Shares Reserved for Future Issuance ​
​ | ​ | ​ | ​ | ​
​ |  | As of December 31,
​ |  | 2020 |  | 2019
Shares reserved for outstanding stock option awards under the 2013 Stock Incentive Plan, as amended |  | 174,362 |  | 312,342
Shares reserved for outstanding stock option awards and restricted stock units under the 2015 Stock Incentive Plan |  | 3,839,345 |  | 4,254,357
Shares reserved for outstanding inducement stock option award |  | 280,000 |  | 175,000
Remaining shares reserved, but unissued, for future awards under the 2015 Stock Incentive Plan |  | 5,599,450 |  | 4,061,357
Remaining shares reserved, but unissued, for future awards under the 2015 Employee Stock Purchase Plan |  | 2,137,127 | ​ | 1,630,199
​ | ​ | 12,030,284 |  | 10,433,255
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