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Equity Incentive Plans (Tables) | 9 Months Ended
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Sep. 30, 2020
Equity Incentive Plans |
Summary of stock option activity under the Equity Plans |
|  |  |  | Weighted |  |  |  |  |
|  |  |  | Average |  | Weighted |  |  | Aggregate
|  |  |  | Exercise Price |  | Average Remaining |  |  | Intrinsic
|  | Options |  | Per Share |  | Life in Years |  |  | Value
Outstanding at December 31, 2019 |  | 4,024,566 |  | $ | 7.48 |  | 7.98 |  | $ | 2
Granted |  | 2,547,500 |  | $ | 2.12 |  |  |  |  |
Exercised |  | (32,778) |  | $ | 1.53 |  |  |  |  |
Forfeited |  | (260,435) |  | $ | 6.95 |  |  |  |  |
Outstanding at September 30, 2020 |  | 6,278,853 |  | $ | 5.35 |  | 8.18 |  | $ | 1,082
Options exercisable at September 30, 2020 |  | 3,113,663 |  | $ | 8.45 |  | 7.12 |  | $ | 359
Options vested and expected to vest at September 30, 2020 |  | 6,278,853 |  | $ | 5.35 |  | 8.18 |  | $ | 1,082
Schedule of assumptions used to determine grant-date fair value of stock options |
|  |  | Nine Months |  | Year Ended |
|  |  | Ended September 30, |  | December 31, |
|  |  | 2020 |  | 2019 |
Expected volatility |  |  | 66.94 | % |  | 66.94 | %
Weighted average risk-free interest rate |  |  | 0.66 | % |  | 2.07 | %
Expected dividend yield |  |  | 0.00 | % |  | 0.00 | %
Expected term (in years) |  |  | 6.85 |  |  | 6.77 |
Schedule of stock-based compensation expense related to issuance of stock option awards recognized in condensed consolidated statements of operations |
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2020 |  | 2019 |  | 2020 |  | 2019
Research and development |  | $ | 282 |  | $ | 181 |  | $ | 720 |  | $ | 536
General and administrative |  |  | 309 |  |  | 769 |  |  | 967 |  |  | 2,260
Total |  | $ | 591 |  | $ | 950 |  | $ | 1,687 |  | $ | 2,796
Summary of outstanding RSU under the 2016 Plan |
|  |  |  | Weighted
|  |  |  | Average
|  | Number of |  | Grant Date
|  | Shares |  | Fair Value
Outstanding at December 31, 2019 |  | 90,500 |  | $ | 1.74
Awarded |  | 753,106 |  | $ | 1.49
Settled in cash |  | (90,500) |  | $ | 1.74
Outstanding at June 30, 2020 |  | 753,106 |  | $ | 1.49

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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=116856206&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=116856206&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=116856206&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=116856206&loc=d3e5070-113901 + Details
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