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Stockholders' Equity (Tables) | 3 Months Ended
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Mar. 31, 2020
Equity [Abstract] |
Schedule of Stock Option Plan Activity | The following is a summary of our stock option and restricted stock activity and related information:
| Stock Options |  |  |  | Restricted Stock Awards |  |
| Shares |  | Weighted-Average Exercise Price |  | Shares |  | Weighted-Average Grant Date Fair Value
Balance as of December 31, 2019 | 1,956,379 |  |  | $ | 77.54 |  |  | 147,259 |  |  | $ | 125.11 |
Granted | 309,456 |  |  | $ | 95.61 |  |  | 94,508 |  |  | $ | 87.25 |
Options exercised/RSUs vested | (81,301) |  |  | $ | 11.70 |  |  | (43,904) |  |  | $ | 123.28 |
Forfeited | — |  |  | $ | — |  |  | — |  |  | $ | — |
Balance as of March 31, 2020 | 2,184,534 |  |  | $ | 82.55 |  |  | 197,863 |  |  | $ | 107.43 |
Schedule of Restricted Stock Activity | The following is a summary of our stock option and restricted stock activity and related information:
| Stock Options |  |  |  | Restricted Stock Awards |  |
| Shares |  | Weighted-Average Exercise Price |  | Shares |  | Weighted-Average Grant Date Fair Value
Balance as of December 31, 2019 | 1,956,379 |  |  | $ | 77.54 |  |  | 147,259 |  |  | $ | 125.11 |
Granted | 309,456 |  |  | $ | 95.61 |  |  | 94,508 |  |  | $ | 87.25 |
Options exercised/RSUs vested | (81,301) |  |  | $ | 11.70 |  |  | (43,904) |  |  | $ | 123.28 |
Forfeited | — |  |  | $ | — |  |  | — |  |  | $ | — |
Balance as of March 31, 2020 | 2,184,534 |  |  | $ | 82.55 |  |  | 197,863 |  |  | $ | 107.43 |

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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + 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)(2) -URI http://asc.fasb.org/extlink&oid=116856206&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=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 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=116856206&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=116856206&loc=d3e5070-113901 + Details
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