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Stock Options | 9 Months Ended
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Sep. 30, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
STOCK OPTIONS |
NOTE 3: | STOCK OPTIONS
Under the terms of its stock option plans, the Company’s board of directors may grant stock options to employees, directors and service providers. The Company granted stock options under the 2006 Stock Incentive Plan (“2006 Plan”) until April 2015 when the 2015 Stock Incentive Plan (“2015 Plan”) was adopted. The 2006 Plan expired in 2016 and there are no remaining shares available to be granted under the 2006 Plan. There were 1,397,203 stock options outstanding under the 2006 Plan as of September 30, 2019. Upon adoption of the 2015 Plan, there were 5,270,095 shares of common stock reserved for issuance. In May 2018, the Company amended the 2015 Plan to increase the number of shares reserved for issuance to 8,211,980. The 2015 Plan had 6,111,373 stock options outstanding as of September 30, 2019. The Company’s board of directors determines the terms of stock options granted under the 2015 Plan, including option exercise prices and vesting. On March 12, 2019, the Company’s board of directors adopted, and the Company’s stockholders approved the Precision BioSciences, Inc. 2019 Incentive Award Plan (“2019 Plan”) and the 2019 Employee Stock Purchase Plan (“2019 ESPP”), both of which became effective on March 27, 2019. On March 27, 2019, the Company ceased granting new awards under the 2015 Plan. The 2019 Plan provides for the grant of incentive stock options, non-qualified stock options, stock appreciation rights, restricted stock, restricted stock units and other share-based awards initially equal to 4,750,000 shares of common stock. The 2019 Plan includes an annual increase of common stock shares on the first day of each calendar year beginning January 1, 2020 and ending on January 1, 2029 by an amount equal to the lesser of (i) 4% of the aggregate number of shares of common stock outstanding on the final day of the immediately preceding calendar year and (ii) such smaller number of shares of common stock as determined by the board of directors (but no more than 5,000,000 shares may be issued upon the exercise of incentive stock options), plus any shares that are subject to awards outstanding under the Company’s 2006 Plan and 2015 Plan as of the effective date of the 2019 Plan that expire, lapse, or are terminated, exchanged for cash, surrendered, repurchased, or canceled without having been fully exercised or forfeited, to the extent so unused. The 2019 Plan had 1,539,054 stock options outstanding as of September 30, 2019. The 2019 ESPP provides for the option to purchase initially up to 525,000 shares of the Company’s common stock plus an annual increase on the first day of each calendar year beginning January 1, 2020 and ending on and including January 1, 2029 by an amount equal to the lesser of (i) 1% of the shares outstanding on the final day of the immediately preceding calendar year and (ii) such smaller number of shares as is determined by our board of directors, provided that no more than 5,250,000 shares of our common stock may be issued under our 2019 ESPP. The purchase price of the shares, in the absence of a contrary designation, will be 85% of the lower of the fair market value of our common stock on the first trading day of the offering period or on the purchase date. The first ESPP offering period commenced on October 21, 2019 and will end on February 29, 2020. The Company recorded employee and nonemployee share-based compensation expense as follows (in thousands):
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Employee |  | $ | 2,328 |  |  | $ | 292 |  |  | $ | 5,905 |  |  | $ | 690 |
Nonemployee |  |  | 163 |  |  |  | - |  |  |  | 414 |  |  |  | 7 |
|  | $ | 2,491 |  |  | $ | 292 |  |  | $ | 6,319 |  |  | $ | 697 |
Share-based compensation expense related to stock options is included in the following line items in the condensed consolidated statements of operations (in thousands):
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Research and development |  | $ | 1,615 |  |  | $ | 224 |  |  | $ | 4,131 |  |  | $ | 502 |
General and administrative |  |  | 876 |  |  |  | 68 |  |  |  | 2,188 |  |  |  | 195 |
|  | $ | 2,491 |  |  | $ | 292 |  |  | $ | 6,319 |  |  | $ | 697 |
Determining the appropriate fair value model to measure the fair value of the stock option grants on the date of grant and the related assumptions requires judgment. The Company granted 2,115,331 stock options for the nine months ended September 30, 2019. The fair value of each stock option grant is estimated using a Black-Scholes option-pricing model on the date of grant as follows:
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2019 |  |  | 2019 |
Estimated dividend yield |  |  | 0.00 | % |  |  | 0.00 | %
Weighted-average expected stock price volatility |  |  | 68.13 | % |  |  | 68.16 | %
Weighted-average risk-free interest rate |  |  | 1.74 | % |  |  | 2.08 | %
Expected life of options (in years) |  |  | 6.81 |  |  |  | 6.60 |
Weighted-average fair value per option |  | $ | 7.57 |  |  | $ | 8.20 |
The expected volatility rates are estimated based on the actual volatility of comparable public companies over the expected term. The expected life represents the average time that stock options that vest are expected to be outstanding. The Company does not have sufficient history of exercising stock options to estimate the expected term of employee stock options and thus continues to calculate expected life based on the midpoint between the vesting date and the contractual term which is in accordance with the simplified method. The expected term for share-based compensation granted to nonemployees is the contractual life. The risk-free rate is based on the United States Treasury yield curve during the expected life of the option. The following table summarizes activity in the Company’s stock option plans for the nine months ended September 30, 2019:
|  | Outstanding Option Shares |  |  | Weighted- Average Exercise Price |
Balance as of January 1, 2019 |  |  | 7,763,464 |  |  | $ | 5.00 |
Granted |  |  | 2,115,331 |  |  |  | 12.48 |
Exercised |  |  | (445,408 | ) |  |  | 0.99 |
Forfeited/canceled |  |  | (385,757 | ) |  |  | 10.46 |
Balance as of September 30, 2019 |  |  | 9,047,630 |  |  |  | 6.72 |
The intrinsic value of stock options exercised was $5.3 million and $1.0 million during the nine months ended September 30, 2019 and 2018, respectively. There was approximately $30.3 million of total unrecognized compensation cost related to unvested stock options as of September 30, 2019, which is expected to be recognized over a weighted-average period of 3.11 years.

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