Income Taxes - Additional Information (Detail) - USD ($) |
12 Months Ended | |
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Dec. 31, 2016 |
Dec. 31, 2015 |
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| Income Tax Disclosure [Line Items] | ||
| Deferred Tax Assets, Valuation Allowance | $ 94,688 | $ 66,730 |
| Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount | 28,000,000 | |
| National Holdings Corporation [Member] | ||
| Income Tax Disclosure [Line Items] | ||
| Deferred Tax Assets, Valuation Allowance | 8,800,000 | |
| Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Income Tax Payable, Current | 400,000 | |
| Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets, Current | 8,800,000 | |
| Deferred Tax Liabilities, Net, Current | 3,200,000 | |
| Domestic Tax Authority [Member] | ||
| Income Tax Disclosure [Line Items] | ||
| Operating Loss Carryforwards | 197,500,000 | |
| Effective Income Tax Rate Reconciliation, Tax Credit, Amount | 6,300,000 | |
| State and Local Jurisdiction [Member] | ||
| Income Tax Disclosure [Line Items] | ||
| Operating Loss Carryforwards | $ 189,500,000 |
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- Definition Amount of income tax payable attributable to taxable temporary difference assumed at the acquisition date that are classified as current. No definition available.
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Amount, after allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences and carryforwards acquired at the acquisition date, classified as current. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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, after deferred tax asset, of deferred tax liability attributable to taxable differences, with jurisdictional netting and classified as current. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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 tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits. 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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- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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