XML 43 R28.htm IDEA: XBRL DOCUMENT
v3.20.4

Stock-Based Compensation (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Stock Option Grants Valuation Assumptions | The following table presents the assumptions used in the Monte Carlo simulation model to determine the fair value of these stock-based awards on their issuance date:
Risk-free interest rate |  |  | 1.5 | %
Expected volatility |  |  | 49.0 | %
Expected dividend yield |  |  | 0 | %
Derived service period (in years) |  |  | 4.1 |
Schedule of Stock Options Activity | The following table summarizes the Company’s option activity since December 31, 2019:
|  | Number of Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Term |  |  | Aggregate Intrinsic Value |
|  |  |  |  |  |  |  | (in years) |  |  | (in thousands) |
Outstanding as of December 31, 2019 |  |  | 2,827,868 |  |  | $ | 7.17 |  |  |  | 6.5 |  |  | $ | 76,850 |
Granted |  |  | 531,108 |  |  |  | 45.17 |  |  |  |  |  |  |  |  |
Exercised |  |  | (776,914 | ) |  |  | 6.32 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (393,143 | ) |  |  | 33.26 |  |  |  |  |  |  |  |  |
Outstanding as of December 31, 2020 |  |  | 2,188,919 |  |  | $ | 12.01 |  |  |  | 5.72 |  |  | $ | 57,538 |
Vested and expected to vest as of December 31, 2020 |  |  | 2,121,884 |  |  | $ | 12.12 |  |  |  | 5.71 |  |  | $ | 55,616 |
Options exercisable as of December 31, 2020 |  |  | 1,370,762 |  |  | $ | 6.94 |  |  |  | 4.84 |  |  | $ | 41,689 |
Schedule of Unvested Restricted Stock Units | The following table summarizes the Company’s RSU activity since December 31, 2019:
|  | Number of Shares |  |  | Weighted Average Grant- Date Fair Value |
Unvested balance December 31, 2019 |  |  | 3,367,846 |  |  | $ | 14.84 |
Granted |  |  | 1,331,417 |  |  |  | 42.35 |
Vested |  |  | (998,478 | ) |  |  | 16.30 |
Forfeited |  |  | (558,565 | ) |  |  | 19.02 |
Unvested balance December 31, 2020 |  |  | 3,142,220 |  |  | $ | 25.29 |
Summary of Stock-Based Compensation Expense of Statements of Operations and Comprehensive Loss | The Company recorded stock-based compensation expense in the following expense categories of its statements of operations and comprehensive loss (in thousands):
|  | Year Ended December 31, |
|  | 2020 |  |  | 2019 |
Cost of revenue |  | $ | 361 |  |  | $ | 193 |
Sales and marketing |  |  | 10,246 |  |  |  | 3,805 |
Research and development |  |  | 7,751 |  |  |  | 3,967 |
General and administrative |  |  | 5,821 |  |  |  | 4,756 |
|  | $ | 24,179 |  |  | $ | 12,721 |

X
- References No definition available. + Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock shares. + 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) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_NonvestedRestrictedStockSharesActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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 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 S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 + Details
Name: | us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration