Stockholders' Equity - Summary of Stock-based Compensation Expense Recognized (Details) - USD ($) $ in Thousands |
3 Months Ended | |
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Mar. 31, 2019 |
Mar. 31, 2018 |
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Stock-based compensation expense by type of award: | ||
Stock-based compensation expense | $ 3,586 | $ 3,381 |
Stock Option Plan Awards | ||
Stock-based compensation expense by type of award: | ||
Stock-based compensation expense | 1,147 | 1,951 |
Restricted stock units and restricted stock awards | ||
Stock-based compensation expense by type of award: | ||
Stock-based compensation expense | 2,257 | 1,239 |
Employee Stock Purchase Plan | ||
Stock-based compensation expense by type of award: | ||
Stock-based compensation expense | $ 182 | $ 191 |
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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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