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Stockholders' Equity (Tables) | 3 Months Ended
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Mar. 31, 2020
Share-based Payment Arrangement [Abstract] |
Stock-Based Compensation Expense for Employees and Non-Employees | Total share-based compensation expense recorded for employees and non-employees is as follows (in thousands):
| Three Months Ended March 31,
| 2020 |  | 2019
Cost of revenues | $ | 169 |  |  | $ | 125 |
Research and development | 6,991 |  |  | 4,917 |
Sales and marketing | 2,186 |  |  | 1,808 |
General and administrative | 8,988 |  |  | 8,188 |
Total share-based compensation expense | $ | 18,334 |  |  | $ | 15,038 |
Summary of Restricted Stock Unit Activity | Activity for RSUs and PSUs is as follows:
| RSUs and PSUs Outstanding
| Shares Outstanding |  | Weighted Average Grant Date Fair Value
Balance at December 31, 2019 | 6,909,530 |  |  | $ | 24.04 |
Granted | 1,760,947 |  |  | 38.74 |
Released | (2,793,397 | ) |  | 16.89 |
Canceled | (214,121 | ) |  | 28.64 |
Balance at March 31, 2020 | 5,662,959 |  |  | $ | 31.96 |

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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=116856206&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=116856206&loc=d3e5047-113901 + 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 http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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