Income Taxes - Additional Information (Details) - USD ($) |
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2019 |
Mar. 31, 2018 |
Dec. 31, 2018 |
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| Income Tax Expense (Benefit), Continuing Operations [Abstract] | |||
| Income tax expense | $ 172,000 | $ 109,000 | |
| Income tax refund received | 0 | 0 | |
| Cash paid for income taxes | 0 | $ 0 | |
| Valuation allowance | 127,800,000 | $ 117,800,000 | |
| Current income taxes receivable | $ 54,076,000 | $ 54,076,000 | |
| Earliest Tax Year | |||
| Income Tax Expense (Benefit), Continuing Operations [Abstract] | |||
| Tax years under examination | 2013 | ||
| Latest Tax Year | |||
| Income Tax Expense (Benefit), Continuing Operations [Abstract] | |||
| Tax years under examination | 2018 | ||
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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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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Carrying amount due within one year of the balance sheet date (or one operating cycle, if longer) from tax authorities as of the balance sheet date representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Tax year that remains open to examination under enacted tax laws, in CCYY format. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The amount of cash received during the period as refunds for the overpayment of taxes. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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