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Stock-based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Summary of Stock Option Activity | The following table summarizes stock option activity for the year ended December 31, 2020:
|  | Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Life |
Outstanding as of December 31, 2019 |  |  | 6,340,000 |  |  | $ | 3.92 |  |  |  | 8.22 |
Granted |  |  | 420,500 |  |  |  | 10.46 |  |  |  |  |
Exercised |  |  | (598,406 | ) |  |  | 3.91 |  |  |  |  |
Forfeited / cancelled |  |  | (544,526 | ) |  |  | 4.48 |  |  |  |  |
Outstanding as of December 31, 2020 |  |  | 5,617,568 |  |  | $ | 4.35 |  |  |  | 7.33 |
Vested and exercisable as of December 31, 2019 |  |  | 2,684,160 |  |  | $ | 3.58 |  |  |  | 7.41 |
Vested and exercisable as of December 31, 2020 |  |  | 3,449,606 |  |  | $ | 3.83 |  |  |  | 6.74 |
Summary of Weighted Average Assumptions Used in Calculation of Fair Value Using Black-Scholes Option Pricing Model | The grant date fair value of stock options granted during the year ended December 31, 2020 was estimated at the time of grant using the Black-Scholes option-pricing model and utilized the following weighted average assumptions:
|  | Year Ended December 31, 2020 |
Fair value of common stock (per share) |  | $ | 10.46 |
Expected term (in years) |  | 5.9 — 6.3 |
Risk-free interest rate |  | 1.7% |
Expected volatility |  | 36.3% — 36.6% |
Dividend yield |  | —% |
Summary of Activity for Restricted Stock Units | The following table summarizes activity for restricted stock units (“RSUs”) for the year ended December 31, 2020:
|  | Shares |  |  | Weighted Average Grant Date Fair Value per Share |
Unvested and outstanding as of December 31, 2019 |  |  | 408,000 |  |  | $ | 4.01 |
Granted |  |  | 2,073,006 |  |  |  | 12.06 |
Vested |  |  | (237,334 | ) |  |  | 3.86 |
Forfeited / cancelled |  |  | (8,230 | ) |  |  | 11.86 |
Unvested and outstanding as of December 31, 2020 |  |  | 2,235,442 |  |  | $ | 11.46 |
Summary of RSAs Activity | The following table summarizes the activity related to the Company’s RSAs for the year ended December 31, 2020:
|  | Shares |
Unvested at December 31, 2019 |  |  | 272,868 |
Vested |  |  | (272,868 | )
Unvested at December 31, 2020 |  |  | — |

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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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