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Stockholder's Equity (Tables) | 3 Months Ended
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Mar. 31, 2021
Share-based Payment Arrangement [Abstract] |
Summary of Stock Option Activity | Activity of stock options under the 2005 Plan, 2011 Plan and 2014 Plan (collectively, the "Plans") is set forth below:
|  | Number of Shares |  | Weighted-Average Exercise Price
Balance at December 31, 2020 |  | 1,020,978 |  |  | $ | 23.38 |
Exercised |  | (42,408) |  |  | 15.70 |
Canceled/Forfeited |  | — |  |  | — |
Balance at March 31, 2021 |  | 978,570 |  |  | 23.71 |
Summary of Unvested Restricted Stock and Restricted Stock Unit Activity | Activity of unvested restricted stock awards and restricted stock units under the Plans during the three months ended March 31, 2021 is set forth below:
|  | Number of Shares |  | Weighted -Average Grant Date Fair Value
Unvested at December 31, 2020 |  | 369,629 |  |  | $ | 163.03 |
Granted |  | 53,080 |  |  | 255.00 |
Released/Vested - Restricted Stock/RSUs |  | (36,672) |  |  | 140.42 |
Canceled/Forfeited |  | (4,182) |  |  | 175.99 |
Unvested at March 31, 2021 |  | 381,855 |  |  | 177.84 |
Schedule of Stock-based Compensation Expense | The following table sets forth the stock-based compensation expense included in the Company’s condensed consolidated statements of operations for the three months ended March 31, 2021 and 2020 (in thousands):
|  | Three Months Ended March 31, |  |
|  | 2021 |  | 2020 |  |  |  |
Cost of revenue |  | $ | 798 |  |  | $ | 648 |  |  |  |  |
Research and development |  | 1,062 |  |  | 874 |  |  |  |  |
Sales, general and administrative |  | 4,535 |  |  | 4,167 |  |  |  |  |
Total |  | $ | 6,395 |  |  | $ | 5,689 |  |  |  |  |

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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 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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