Equity Incentive Plans (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2018 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule of Fair Value of Stock Option Grants Valuation Assumptions by Block-Scholes Option Pricing Model |
The fair value of stock option grants is set forth below and was determined using the Black-Scholes option pricing model with the following assumptions:
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Schedule of Stock Option Activity |
A summary of stock option activities under the 2005 Plan and 2017 Plan during 2016, 2017 and 2018 is as follows:
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Schedule of Stock Options Outstanding, Exercisable and Vested |
Stock options outstanding, exercisable and vested were as follows:
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Schedule of Stock-Based Compensation Expense Recorded in Consolidated Statements of Operations |
Total stock-based compensation expense associated with the 2005 Plan, 2017 Plan and 2017 ESPP is recorded in the consolidated statements of operations and was allocated as follows (in thousands):
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