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Equity-based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2022
Equity-based Compensation |
Schedule of fair value of options granted using the Black-Scholes option pricing model | ​
​ | ​ | ​ | ​ | ​
​ | ​ | Six Months Ended June 30,
​ |  | 2022 |  | 2021
Fair value of common stock | ​ | $1.92 – $3.05 | ​ | $1.75 – $6.15
Expected volatility | ​ | 91.09% – 92.72% | ​ | 100.82% – 101.83%
Risk-free interest rate | ​ | 1.87% –  3.25% | ​ | 0.67% – 1.06%
Dividend yield | ​ | 0.00% | ​ | 0.00%
Expected term (years) | ​ | 5.50–6.08 | ​ | 5.00–6.22
Summary of activity for options | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Options Outstanding
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted
​ | ​ | ​ | ​ | Weighted- | ​ | Aggregate | ​ | Average
​ | ​ | ​ | ​ | Average | ​ | Intrinsic | ​ | Remaining
​ | ​ | Number of | ​ | Exercise | ​ | Value | ​ | Contractual Life
​ |  | Options |  | Price |  | (in 000’s) |  | (In Years)
Balance, December 31, 2021 |  | 5,640,438 | ​ | $ | 4.19 |  | $ | 12,002 |  | 8.0
Options granted |  | 426,575 | ​ | $ | 2.52 |  | ​ | ​ |  | ​
Options exercised |  | (367,875) | ​ | $ | 0.89 |  | ​ | ​ |  | ​
Options forfeited |  | (422,870) | ​ | $ | 5.49 |  | ​ | ​ |  | ​
Options expired |  | (41,737) | ​ | $ | 0.87 |  | ​ | ​ |  | ​
Balance, June 30, 2022 |  | 5,234,531 | ​ | $ | 4.26 | ​ | $ | 3,720 |  | 7.1
Exercisable as of June 30, 2022 |  | 3,350,614 | ​ | $ | 3.02 | ​ | $ | 3,125 | ​ | 6.1
Vested and expected to vest as of June 30, 2022 |  | 5,234,531 | ​ | $ | 4.26 | ​ | $ | 3,720 | ​ | 7.1
Schedule of total equity-based compensation expense | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended June 30, | ​ | Six Months Ended June 30,
​ |  | 2022 |  | 2021 |  | 2022 |  | 2021
Research and development | ​ | $ | 82 | ​ | $ | 13 | ​ | $ | 316 | ​ | $ | 34
General and administrative | ​ |  | 810 | ​ |  | 81 | ​ |  | 1,577 | ​ |  | 158
Total equity-based compensation | ​ | $ | 892 | ​ | $ | 94 | ​ | $ | 1,893 | ​ | $ | 192

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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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