Income Taxes (Details Textual) - USD ($) |
12 Months Ended | |
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Dec. 31, 2018 |
Dec. 31, 2017 |
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| Deferred Tax Assets, Valuation Allowance | $ 25,052,000 | $ 19,022,000 |
| Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% | 35.00% |
| Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount | $ 6,200,000 | |
| Deferred Income Tax Expense (Benefit) | $ 0 | |
| research and development credit carryforwards [Member] | ||
| Tax Credit Carryforward, Amount | $ 1,900,000 | |
| Tax Credit Carryforward, Expiration Date | Dec. 31, 2035 | |
| Domestic Tax Authority [Member] | ||
| Operating Loss Carryforwards | $ 63,400,000 | |
| Operating Loss Carry forwards Expiration Period | 2035 | |
| State and Local Jurisdiction [Member] | ||
| Operating Loss Carryforwards | $ 55,200,000 | |
| Operating Loss Carry forwards Expiration Period | 2035 | |
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- Definition Expiration period of each operating loss carryforward included in operating loss carryforward. No definition available.
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- Definition Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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 Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Expiration date of the tax credit carryforward, in CCYY-MM-DD format. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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