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STOCK-BASED COMPENSATION (Tables) | 9 Months Ended
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Sep. 30, 2020
STOCK-BASED COMPENSATION |
Summary of the Company's stock option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ | ​ |  | Weighted Average |  | ​ | ​ |
​ | ​ | ​ | ​ | ​ | ​ | ​ | Remaining | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted Average | ​ | Contractual Life (in | ​ | ​ | ​ | ​
​ | ​ | Number of Shares | ​ | Exercise Price | ​ | years) | ​ | Intrinsic Value | ​
Outstanding as of January 1, 2020 |  | 4,983,314 | ​ | $ | 7.79 | ​ | 8.9 | ​ | $ | 18,000 |
Granted |  | 1,411,000 | ​ | ​ | 2.13 | ​ | 9.4 | ​ | ​ | — | ​
Canceled |  | (512,500) | ​ | ​ | 9.13 | ​ | — | ​ | ​ | — | ​
Outstanding as of September 30, 2020 |  | 5,881,814 | ​ | $ | 6.31 | ​ | 8.5 | ​ | $ | — | ​
Options vested and exercisable |  | 2,196,946 | ​ | $ | 7.41 | ​ | 8.1 | ​ | $ | — |
​
Schedule or Description of Weighted Average Discount Rate | ​
​ | ​ | ​ | ​ | ​
​ | ​ | For the Nine Months Ended | ​
​ |  | September 30, 2020 |
Exercise price | ​ | $ | 2.13 | ​
Expected term (years) | ​ |  | 6.0 | ​
Expected stock price volatility | ​ |  | 109 | %
Risk-free rate of interest | ​ |  | 1 | %
Expected dividend rate | ​ |  | 0 | %
​
Schedule of stock-based compensation expenses | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | For the Three Months Ended |  | For the Nine Months Ended |
​ | ​ | September 30, |  | September 30, |
​ |  | 2020 |  | 2019 |  | 2020 |  | 2019 |
Stock Compensation expenses: |  | ​ |  |  | ​ |  | ​ | ​ |  |  | ​ |  | ​
Research and development | ​ | $ | 636,000 | ​ | $ | 553,000 | ​ | $ | 1,945,000 | ​ | $ | 1,844,000 | ​
General and administrative | ​ |  | 634,000 | ​ |  | 631,000 | ​ |  | 2,030,000 | ​ |  | 2,230,000 | ​
Total stock compensation expenses | ​ | $ | 1,270,000 | ​ | $ | 1,184,000 | ​ | $ | 3,975,000 | ​ | $ | 4,074,000 | ​

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- Definition Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, 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 (e) -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 (c)(2) -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 (d) -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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