Income Taxes - Schedule of Income Tax Reconciliation (Details)	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Computed tax benefit at federal statutory rate	21.00%	34.00%
Re-rate of federal net deferred tax assets	0.00%	(35.00%)
Permanent differences	0.00%	(8.00%)
State tax benefit	10.00%	3.00%
Research and development credits	1.00%	1.00%
Other	(1.00%)	0.00%
Adjust basis for available-for-sale-securities	0.00%	11.00%
Change in valuation allowance	(31.00%)	(6.00%)
Income tax benefit percentage	0.00%	0.00%

Effective income tax rate reconciliation adjust basis for available-for-sale-securities.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage 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 deductions. Including, but not limited to, extraterritorial income exclusion deduction, qualified production activity deduction, dividend deduction, deduction for dividend paid to employee stock ownership plan, Medicare prescription drug benefit subsidy deduction, and other deductions.

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Percentage of the difference, between reported income tax expense (benefit) and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, that is attributable to tax exempt income, equity in earnings (loss) of an unconsolidated subsidiary, minority interest income (expense), tax holiday, disposition of a business, disposition of an asset, repatriation of foreign earnings, repatriation of foreign earnings jobs creation act of 2004, change in enacted tax rate, prior year income taxes, change in deferred tax asset valuation allowance, and other adjustments.

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