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STOCK-BASED COMPENSATION | 6 Months Ended
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Jun. 30, 2021
Share-based Payment Arrangement [Abstract] |
STOCK-BASED COMPENSATION | STOCK-BASED COMPENSATION Under the Company's stock option plans, the board of directors may grant restricted stock and options to purchase common shares to the Company's employees, officers, directors and consultants. The Company accounts for stock options in accordance with FASB ASC Topic 718, Compensation - Stock Compensation, with stock-based compensation expense recognized over the vesting period based on the fair value on the grant date utilizing the Black Scholes model, which includes a number of estimates that affect the grant date fair value and the amount of expense to recognize. The Company recognized approximately $1,369,000 and $2,563,000, respectively, in stock-based compensation expense during the three and six months ended June 30, 2021, as compared with $1,097,000 and $2,146,000, respectively, for the three and six months ended June 30, 2020. Stock option activity is summarized as follows:
| Number of options |  | Weighted average exercise price
Outstanding at December 31, 2020 | 4,938,943 |  |  | $ | 5.46 |
Granted | 775,980 |  |  | 9.32 |
Exercised | (55,582) |  |  | 4.56 |
Canceled and forfeited | (98,635) |  |  | 8.05 |
Outstanding at June 30, 2021 | 5,560,706 |  |  | $ | 5.96 |
The Company allows stock option holders to exercise stock-based awards by surrendering stock-based awards with an intrinsic value equal to the cumulative exercise price of the stock-based awards being exercised, referred to as net settlements. These surrenders are included in stock options exercised in the options rollforward above. For the three months ended June 30, 2021 and 2020, respectively, we received 6,614 and 11,085 options as payment in the exercise of 4,886 and 17,665 options. For the six months ended June 30, 2021 and 2020, respectively, we received 22,055 and 13,009 options as payment in the exercise of 26,027 and 22,027 options. Common shares required to be issued upon the exercise of stock options would be issued from authorized and unissued shares. The Company calculated the grant date fair value of options granted in 2021 ("2021 Grants") utilizing a Black Scholes model with an expected life calculated via the simplified method.
| 2021 Grants |  |  |  |
Strike price | $9.29 | - | $9.55 |  |  |  |  |  |  |  |
Risk-free rate | 0.6% | - | 0.8% |  |  |  |  |  |
Expected dividend yield | — |  |  |  |
Expected volatility | 70.7% | - | 70.8% |  |  |  |  |  |  |  |
Expected term (in years) | 4.5 | - | 6 |  |  |  |  |  |

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- Definition The entire disclosure for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 + Details
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- References No definition available. + Details
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