Stock Based Compensation - Additional Information (Detail) - USD ($) |
9 Months Ended | |
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Sep. 30, 2019 |
Sep. 30, 2018 |
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| Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] | ||
| Unrecognized compensation cost related to unvested stock-based awards granted to employees under the equity incentive plans | $ 14,300,000 | |
| Unrecognized compensation cost related to unvested stock-based awards granted to employees under the equity incentive plans, period for recognition | 2 years 9 months 10 days | |
| Total intrinsic value of stock options exercised | $ 300,000 | $ 1,600,000 |
| Cash received from stock option exercises | 1,300,000 | $ 157,000 |
| Tax benefit realized upon exercise of option | $ 0 | |
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- References No definition available.
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- Definition Amount of cost not yet recognized for nonvested award under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of tax benefit from exercise of option under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of cash inflow from exercise of option under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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