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SHARE BASED COMPENSATION (Tables) | 12 Months Ended
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Dec. 31, 2021
Share-based Payment Arrangement [Abstract] |
Schedule of share-based compensation awards granted for options and RSUs during the period | In the years ended December 31, 2021 and 2020, the Company granted options as follows:
| Year ended December 31, 2021
| Award amount |  | Exercise price range |  | Vesting period |  | Expiration
Employees and Directors: |  |  |  |  |  |  |
Options | 1,686,405 |  |  | $1.68- $11.08 |  | 1 year -4 years |  | 10 years
RSU | 970,813 |  |  | — |  |  | 2 years -4 years |  | — |
| Year ended December 31, 2020
| Award amount |  | Exercise price range |  | Vesting period |  | Expiration
Employees and Directors: |  |  |  |  |  |  |
Options | 1,327,214 |  |  | $5.84- $12.52 |  | 1 year -4 years |  | 10 years
RSU | 654,427 |  |  | — |  |  | 1 year -4 years |  | — |
Summary of underlying data used for computing the fair value of the options | The underlying data used for computing the fair value of the options are as follows:
| Year ended December 31
| 2021 |  | 2020
Fair value of stock option | $1.02-$6.75 |  | $3.47-$7.68
Dividend yield | 0 | % |  | 0 | %
Expected volatility | 68.38%-69.38% |  | 60.44%-69.83%
Risk-free interest rate | 0.50%-1.29% |  | 0.31%-1.26%
Expected term | 6 years |  | 6 years
Summary of the number of options outstanding | The following table summarizes the number of options outstanding for the year ended December 31, 2021, and related information:
| Number of options |  | Weighted Average Exercise Price |  |  |  |
Outstanding at December 31, 2020 | 4,274,649 |  |  | $ | 13.36 |  |  |  |  |
Granted | 1,686,405 |  |  | 5.29 |  |  |  |  |
Exercised | (70,827) |  |  | 7.18 |  |  |  |  |
Forfeited | (435,569) |  |  | 8.25 |  |  |  |  |
Expired | (1,410,706) |  |  | 17.53 |  |  |  |  |
Outstanding at December 31, 2021 | 4,043,952 |  |  | $ | 9.20 |  |  |  |  |
Exercisable at December 31, 2021 | 1,971,922 |  |  | $ | 12.39 |  |  |  |  |
Summary of the number of RSUs outstanding | The following table summarizes the number of RSUs outstanding for the year ended December 31, 2021:
| Number of RSUs
Outstanding at December 31, 2020 | 719,443 |  |  |
Awarded | 970,813 |  |  |
Vested | (293,034) |  |  |
Forfeited | (134,822) |  |  |
Outstanding at December 31, 2021 | 1,262,400 |  |  |
Summary of share-based compensation expenses | The following table illustrates the effect of share-based compensation on the statements of operations:
| Year ended December 31
| 2021 |  | 2020
Research and development expenses | 1,714 |  |  | 4,746 |
Selling, general and administrative | 6,366 |  |  | 13,354 |
| $ | 8,080 |  |  | $ | 18,100 |

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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