Provision for Income Taxes - Summary of Valuation Allowance (Detail) - USD ($) $ in Thousands |
12 Months Ended | |
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Dec. 31, 2018 |
Dec. 31, 2017 |
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Valuation Allowance [Abstract] | ||
Valuation allowance, at beginning of year | $ 18,278 | $ 9,852 |
Change in valuation allowance | 16,955 | 8,426 |
Valuation allowance, at end of year | $ 35,233 | $ 18,278 |
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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