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Stockholders' Equity (Tables) | 9 Months Ended
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Sep. 30, 2020
Stockholders' Equity Note [Abstract] |
Share-based Compensation, Stock Options, Activity | A summary of employees’ stock options activities during the nine months ended September 30, 2020 is as follows:
| Nine Months Ended September 30, 2020 (unaudited) |  |  |  |  |  |
| Number |  | Weighted average exercise price |  | Aggregate intrinsic value (in thousands) |  | Weighted average remaining contractual life (years)
Options outstanding as of January 1, 2020 | 454,348 |  |  | $ | 20.628 |  |  | $ | 25,935 |  |  | 4.343
Granted | — |  |  | $ | — |  |  |  |  |
Exercised | (121,487) |  |  | $ | 20.177 |  |  |  |  |
Forfeited and expired | (500) |  |  | $ | 1.576 |  |  |  |  |
Options outstanding and exercisable as of September 30, 2020 | 332,361 |  |  | $ | 20.822 |  |  | $ | 31,441 |  |  | 3.673
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range | The options outstanding as of September 30, 2020 (unaudited) have been separated into ranges of exercise price as follows:
Range of exercise price |  |  |  |  |  | Options outstanding and exercisable as of September 30, 2020 |  | Weighted average remaining contractual life (years) |  | Weighted average exercise price of options outstanding and exercisable
$ | 6.230 |  |  | — |  | 8.800 |  | 10,356 |  |  | 1.356 |  |  | $ | 8.289 |
$ | 12.470 |  |  | — |  | 16.870 |  | 89,825 |  |  | 3.371 |  |  | $ | 14.282 |
$ | 19.510 |  |  | — |  | 24.230 |  | 173,998 |  |  | 3.786 |  |  | $ | 21.440 |
|  | $29.880 |  |  |  | 46,588 |  |  | 4.395 |  |  | $ | 29.880 |
|  | $39.860 |  |  |  | 11,594 |  |  | 3.474 |  |  | $ | 39.860 |
|  |  |  |  |  | 332,361 |  |  | 3.673 |  |  | $ | 20.822 |
Schedule of Stockholders' Equity Note, Warrants or Rights | The Company’s outstanding options granted to consultants for services as of September 30, 2020 (unaudited) were as follows:
| Options outstanding and exercisable as of September 30, 2020 |  | Exercise price per share |  | Exercisable through
| (number) |  |  |  |
August 2013 | 3,100 |  |  | $ | 21.140 |  |  | August 2023
March 2014 | 2,300 |  |  | $ | 39.860 |  |  | March 2024
May 2014 | 2,600 |  |  | $ | 22.010 |  |  | May 2024
November 2014 | 4,038 |  |  | $ | 21.660 |  |  | November 2024
February 2016 | 1,000 |  |  | $ | 16.870 |  |  | February 2026
| 13,038 |  |  |  |  |
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity | A summary of restricted stock units and performance stock units for employees, consultants and non-employee directors of the Company for the nine months ended September 30, 2020 (unaudited) is as follows:
| Number of shares underlying outstanding restricted stock units |  | Weighted- average grant date fair value
Unvested balance - January 1, 2020 | 2,559,083 |  |  | $ | 49.58 |
Granted | 1,361,881 |  |  | $ | 86.27 |
Vested | (898,820) |  |  | $ | 44.28 |
Forfeited | (156,613) |  |  | $ | 60.23 |
Unvested balance – September 30, 2020 | 2,865,531 |  |  | $ | 68.10 |
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs | The Company recognized non-cash stock-based compensation expense in the consolidated statements of operations as follows:
| Three Months Ended September 30, |  |  |  | Nine Months Ended September 30, |  |
| 2020 |  | 2019 |  | 2020 |  | 2019
| (unaudited) (in thousands) |  |  |  | (unaudited) (in thousands) |  |
Cost of revenues | $ | 1,476 |  |  | $ | 637 |  |  | $ | 3,615 |  |  | $ | 1,967 |
Research and development | 6,000 |  |  | 3,476 |  |  | 15,767 |  |  | 9,674 |
Sales and marketing | 7,184 |  |  | 3,932 |  |  | 18,773 |  |  | 11,015 |
General and administrative | 4,018 |  |  | 2,977 |  |  | 11,029 |  |  | 12,123 |
Total | $ | 18,678 |  |  | $ | 11,022 |  |  | $ | 49,184 |  |  | $ | 34,779 |

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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 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
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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + 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 -URI http://asc.fasb.org/extlink&oid=120381028&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=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 Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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- Definition Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6784392&loc=d3e188667-122775 + Details
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