Income Taxes (Detail Textuals) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Amount of federal rate change			$ 1,870
Expected federal statutory income tax rate	21.00%	34.00%	21.00%	34.00%
Retained earnings includes contingency reserve for loan losses			$ 1,534		$ 1,534	$ 1,534
Reserve balance under deferred income taxes	$ 414		$ 414		$ 614	$ 0

Amount of the related income tax effect of a cumulative effect on retained earnings.

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Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences from reserves, classified as other.

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

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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 income tax rates.

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