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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2022
Stock-Based Compensation |
Schedule of stock-based compensation expense | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​
​ | ​ | ​
​ |  | 2022 |  | 2021 |  | 2020
Secondary market transaction | ​ | $ | — | ​ | $ | 1,933 | ​ | $ | 1,616
Employee earnout restricted stock | ​ | ​ | — | ​ | ​ | 22,961 | ​ | ​ | —
Employee awards | ​ |  | 27,041 | ​ |  | 13,698 | ​ |  | 9,680
Total operating expenses | ​ | $ | 27,041 | ​ | $ | 38,592 | ​ | $ | 11,296
​
Schedule of stock option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ | ​ |  | Weighted- |  | ​ | ​
​ |  | ​ |  | Weighted- |  | Average |  | ​ | ​
​ |  | Number of |  | Average |  | Remaining |  | Aggregate
​ | ​ | Options |  | Exercise |  | Contractual | ​ | Intrinsic
​ | ​ | Outstanding | ​ | Price |  | Life (Years) | ​ | Value
Balances as of December 31, 2021 |  | 4,822,992 | ​ | $ | 3.63 |  | 7.0 | ​ | $ | 57,973
Options granted |  | 9,396 | ​ |  | 3.15 |  |  |  | ​ |
Options exercised |  | (473,653) | ​ |  | 2.36 |  |  |  | ​ |
Options forfeited |  | (416,735) | ​ |  | 5.01 |  |  |  | ​ |
Options expired |  | (79,082) | ​ |  | 6.33 |  |  |  | ​ |
Balances as of December 31, 2022 |  | 3,862,918 | ​ | $ | 3.58 |  | 5.6 | ​ | $ | 74
Exercisable at December 31, 2022 |  | 3,429,421 | ​ | $ | 3.20 |  | 5.4 | ​ | $ | 71
​
Schedule of fair value of assumptions | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2022 |  | 2021 |  | 2020
Risk-free interest rate |  | 3.2 % | ​ | 0.9 – 1.3 % | ​ | 0.3 – 0.6 %
Expected term (years) |  | 6 | ​ | 5 – 6 | ​ | 5 – 6
Dividend yield |  | — | ​ | — | ​ | —
Volatility |  | 60 % | ​ | 60 – 61 % | ​ | 59 – 60 %
Weighted-average grant-date fair value per share |  | $1.85 | ​ | $8.23 | ​ | $2.26
​
Summary of the activity of restricted stock awards | ​
​ | ​ | ​ | ​ | ​ | ​
​ |  | Number of | ​ | Weighted
​ |  | Restricted | ​ | Average
​ |  | Stock Units | ​ | Fair Value
Balances as of January 1, 2022 |  | 2,675,578 | ​ | $ | 18.77
Granted |  | 5,775,348 | ​ | ​ | 4.38
Vested |  | (2,157,886) | ​ | ​ | 9.59
Canceled | ​ | (983,799) | ​ | ​ | 11.42
Balances as of December 31, 2022 |  | 5,309,241 | ​ | $ | 8.21
​
Summary of the activity of performance restricted stock unit awards | ​
​ | ​ | ​ | ​ | ​ | ​
​ |  | Number of | ​ | ​
​ | ​ | Performance | ​ | Weighted
​ |  | Restricted | ​ | Average
​ |  | Stock Units | ​ | Fair Value
Balances as of January 1, 2022 |  | 37,184 | ​ | $ | 21.51
Granted |  | 1,185,336 | ​ | ​ | 3.63
Vested |  | — | ​ | ​ | —
Forfeited | ​ | (301,596) | ​ | ​ | 1.85
Balances as of December 31, 2022 |  | 920,924 | ​ | $ | 4.94
​

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + 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 (h)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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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 https://asc.fasb.org/extlink&oid=128089324&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 https://asc.fasb.org/extlink&oid=128089324&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 https://asc.fasb.org/extlink&oid=128089324&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 https://asc.fasb.org/extlink&oid=128089324&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 https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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