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STOCK-BASED COMPENSATION | 6 Months Ended
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Jun. 30, 2021
STOCK-BASED COMPENSATION |
STOCK-BASED COMPENSATION | NOTE 12: STOCK-BASED COMPENSATION Stock Options 2021 Equity Incentive Awards On February 10, 2021, pursuant to the Company’s 2020 Equity Incentive Plan, the compensation committee of the Company’s board of directors approved a total of 740,000 options to purchase the Company’s common stock as equity-based incentive awards to the Company’s executive officers, other than the Chief Executive Officer. Each option award was granted with an exercise price of $3.29 per share, the closing price of the Company’s common stock on the Nasdaq Global Market on February 10, 2021, with the option award vesting in 48 equal monthly installments over a four-year period, subject to such executive officer’s continued service on the applicable vesting date. Additionally, on February 10, 2021, the compensation committee of the Company’s board of directors approved a total of 260,000 options to purchase the Company’s common stock to non-executive employees of the Company as equity-based incentive awards. Each option award was granted with an exercise price of $3.29 per share, the closing price of the Company’s common stock on the Nasdaq Global Market on February 10, 2021, with the option award vesting in 48 equal monthly installments over a four-year period, subject to such employee’s continued service on the applicable vesting date. On February 11, 2021, upon the recommendation of the compensation committee and pursuant to the Company’s 2020 Equity Incentive Plan, the Company’s board of directors approved a total of 430,000 options to purchase the Company’s common stock as (equity-based incentive awards to the Company’s Chief Executive Officer. The option award was granted with an exercise price of $3.06 per share, the closing price of the Company’s common stock on the Nasdaq Global Market on February 11, 2021, with the option award vesting in 48 equal monthly installments over a four-year period, subject to such Chief Executive Officer’s continued service on the applicable vesting date. The above awards were in addition to 90,000 stock option awards issued during the three months ended March 31, 2021 to new employees upon their commencement of employment with the Company. Each option award was granted with an exercise price of $1.47 per share, the closing price of the Company’s common stock on the Nasdaq Global Market on January 4, 2021, with 25% of the option award vesting in one year and the remaining 75% vesting in 36 equal monthly installments thereafter over a three-year period, subject to such employee's continued service on the applicable vesting date. Also, 100,000 stock option awards were issued during the three months ended June 30, 2021 to new employees upon their commencement of employment with the Company. Each option award was granted with an exercise price of $2.19 per share, the closing price of the Company’s common stock on the Nasdaq Global Market on April 1, 2021, with 25% of the option award vesting in one year and the remaining 75% vesting in 36 equal monthly installments thereafter over a three-year period, subject to such employee’s continued service on the applicable vesting date. During the six months ended June 30, 2021, 1,456 stock options were exercised for net proceeds of $3,100. A summary of the Company’s stock option activity for the six months ended June 30, 2021 is as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ | ​ | ​ | ​ | ​ |  | Weighted Average
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Remaining
​ | ​ | ​ | ​ | Weighted Average | ​ | Total Intrinsic | ​ | Contractual
​ |  | Number of Shares |  | Exercise Price |  | Value |  | Life (in years)
Outstanding as of January 1, 2021 |  | 6,001,814 | ​ | $ | 6.22 | ​ | $ | — | ​ | 8.3
Granted |  | 1,620,000 | ​ | ​ | 3.06 | ​ | ​ | — | ​ | 9.3
Exercised | ​ | (1,456) | ​ | ​ | 2.12 | ​ | ​ | — | ​ | —
Canceled/Expired |  | (159,581) | ​ | ​ | 3.42 | ​ | ​ | — | ​ | —
Outstanding as of June 30, 2021 |  | 7,460,777 | ​ | $ | 5.59 | ​ | $ | 1,178,000 | ​ | 8.1
Options vested and exercisable |  | 3,396,723 | ​ | $ | 6.91 | ​ | $ | 299,000 | ​ | 7.5
​ The Black-Scholes option pricing model is used to estimate the fair value of stock options granted under the Company’s share-based compensation plans. The weighted average assumptions used in calculating the fair values of stock options that were granted during the six months ended June 30, 2021 was as follows: ​
​ | ​ | ​ | ​ | ​
​ | ​ | For the Six Months Ended | ​
​ |  | June 30, 2021 |
Exercise price | ​ | $ | 3.06 | ​
Expected term (years) | ​ |  | 6.0 | ​
Expected stock price volatility | ​ |  | 95 | %
Risk-free rate of interest | ​ |  | 1 | %
Expected dividend rate | ​ |  | 0 | %
​ The following table sets forth stock-based compensation expenses recorded during the respective periods: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | For the Three Months Ended |  | For the Six Months Ended
​ | ​ | June 30, |  | June 30,
​ |  | 2021 |  | 2020 |  | 2021 |  | 2020
Stock Compensation expenses: |  | ​ |  |  | ​ |  | ​ | ​ |  |  | ​ |
Research and development | ​ | $ | 709,000 | ​ | $ | 528,000 | ​ | $ | 1,405,000 | ​ | $ | 1,309,000
General and administrative | ​ |  | 943,000 | ​ |  | 833,000 | ​ |  | 1,624,000 | ​ |  | 1,396,000
Total stock compensation expenses | ​ | $ | 1,652,000 | ​ | $ | 1,361,000 | ​ | $ | 3,029,000 | ​ | $ | 2,705,000
​ As of June 30, 2021, the total stock-based compensation cost related to unvested awards not yet recognized was $11.2 million. The expected weighted average period compensation costs to be recognized was approximately 2.3 years. Future option grants will impact the compensation expense recognized.

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