Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
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| Income Taxes [Line Items] | ||
| Valuation allowance | $ 5,907 | |
| Operating loss carryforwards, expiration date | 2037 | |
| Tax benefits recorded to additional paid-in capital because of the exercise of stock options | $ 100 | $ 800 |
| Federal [Member] | ||
| Income Taxes [Line Items] | ||
| Net operating loss carryforwards | 26,700 | |
| State [Member] | ||
| Income Taxes [Line Items] | ||
| Net operating loss carryforwards | $ 1,300 | |
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- Definition Employee service share based compensation tax benefit realized from stock options exercise. No definition available.
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- Definition Income taxes. No definition available.
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- Definition Operating loss carryforwards expiration year. No definition available.
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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://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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