Equity Based Compensation | 7. Equity Based Compensation In connection with the Company’s initial public offering in July 2019, the Company adopted the 2019 Equity Incentive Plan (the “2019 Plan”) in June 2019, which replaced the 2018 Stock Incentive Plan. The 2019 Plan provides for the grant of stock options, restricted stock awards, stock bonus awards, cash awards, stock appreciation right, RSUs, and performance awards to directors, officers and employees of the Company, as well as consultants and advisors of the Company. On January 1, 2020, the number of shares of common stock available for issuance under the 2019 Plan increased by 1,204,410 shares as a result of the automatic increase provision of the 2019 Plan. As of June 30, 2020, there were a total of 1,378,772 shares available for future award grants under the 2019 Plan. The Company recognized equity-based compensation expense in the condensed consolidated statements of operations and comprehensive loss, by award type, as follows (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2020 2019 2020 2019 Stock option $ 2,190 $ 439 $ 4,061 $ 751 Restricted stock 192 228 755 415 ESPP 107 — 217 — Total $ 2,489 $ 667 $ 5,033 $ 1,166 The following table summarizes the allocation of equity-based compensation expense in the condensed consolidated statements of operations and comprehensive loss, by expense category: Three Months Ended June 30, Six Months Ended June 30, 2020 2019 2020 2019 Research and development expense $ 1,352 $ 403 $ 3,143 $ 684 General and administrative expense 1,137 264 1,890 482 Total $ 2,489 $ 667 $ 5,033 $ 1,166 Restricted Common Stock The following table summarizes the restricted stock awards activity during the six months ended June 30, 2020: Weighted Average Fair Value per Share Number of Shares at Issuance Unvested restricted common stock as of December 31, 2019 379,770 $ 4.32 Granted — — Vested (141,737) 4.32 Forfeited (13,802) 4.32 Unvested restricted common stock as of June 30, 2020 224,231 $ 4.32 As of June 30, 2020, the Company had unrecognized equity‑based compensation expense of $608,000 related to the restricted stock awards, which is expected to be recognized over a weighted average period of 0.4 years. Restricted Stock Units During the six months ended June 30, 2020, the Company granted restricted common stock units. The following table summarizes the restricted stock units activity during the six months ended June 30, 2020: Weighted Average Fair Value per Share Number of Shares at Issuance Unvested restricted common stock units as of December 31, 2019 — $ — Granted 66,216 10.84 Vested — — Forfeited — — Unvested restricted common stock units as of June 30, 2020 66,216 $ 10.84 As of June 30, 2020, the Company had unrecognized equity‑based compensation expense of $649,000 related to the restricted stock units, which is expected to be recognized over a weighted average period of 2.93 years. Stock Options The following table summarizes the Company’s stock option activity during the six months ended June 30, 2020: Weighted Weighted Average Number of Average Remaining Aggregate Shares Exercise Price Contractual Term Intrinsic Value (in years) (in thousands) Outstanding as of December 31, 2019 2,987,403 $ 8.67 9.22 $ 26,254 Granted 1,955,685 15.39 — — Exercised (116,382) 6.07 — — Forfeited (132,382) 8.44 — — Outstanding as of June 30, 2020 4,694,324 $ 11.54 9.13 $ 72,798 Options vested and expected to vest as of June 30, 2020 4,694,324 $ 11.54 9.13 $ 72,798 Options exercisable as of June 30, 2020 841,581 $ 6.84 8.66 $ 17,012 As of June 30, 2020, the Company had unrecognized equity‑based compensation expense of $30.6 million related to stock options issued to employees and non-employees, which is expected to be recognized over a weighted average period of 2.99 years. The weighted average grant‑date fair value per share of stock options granted to employees and non-employees for stock option awards with service‑based vesting conditions during the six months ended June 30, 2020 was $10.50 per share. The following table summarizes assumptions used in determining the fair value of the options granted during the six months ended June 30, 2020: Six Months Ended June 30, Six Months Ended June 30, 2020 2019 Risk‑free interest rate 0.46% 2.08% Expected dividend yield - - Expected term (in years) 6.00 5.99 Expected Volatility 80.85% 75.48% The Company determined the volatility for options granted in 2020 based on reported data for a guideline group of companies that issued options with substantially similar terms. The risk-free interest rate is based on a zero-coupon United States Treasury instrument with terms consistent with the expected life of the stock options. The expected term of options granted by the Company has been determined based upon the simplified method, because the Company does not have sufficient historical information regarding its options to derive the expected term. Under this approach, the expected term is the mid-point between the weighted average of vesting period and the contractual term. The Company has not paid and does not anticipate paying cash dividends on shares of common stock; therefore, the expected dividend yield is assumed to be zero. ESPP In June 2019, the Company adopted the 2019 Employee Stock Purchase Plan (“ESPP”), which became effective on June 26, 2019. The Company initially reserved 300,000 shares of common stock for sale under the ESPP. On January 1, 2020, the number of shares of common stock available for issuance under the ESPP increased by 301,102 shares as a result of the automatic increase provision of the ESPP. The ESPP is a qualified, compensatory plan under Section 423 of the Internal Revenue Code and offers substantially all employees opportunity to purchase up to $25,000 of common stock per year at 15% discount to the lower of the beginning of the offering period price or the end of the offering period price. Compensation expense for discounted purchases under the ESPP is measured using the Black-Scholes model to compute the fair value of the lookback provision plus the purchase discount and is recognized as compensation expense over the course of the offering period. During the six months ended June 30, 2020, the Company granted awards with a weighted average grant date fair value of $6.37. |