Employee Benefit Plans (Detail Textuals)	12 Months Ended
Dec. 31, 2016 USD ($) Executive shares	Dec. 31, 2015 USD ($) shares
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Description of defined contribution pension	Employees are eligible for participation in the 401(k) Plan after one year of service and attaining age 21. The 401(k) Plan allows employees to contribute 1% to 100% of their annual salary subject to statutory limitations. Matching contributions made by the Bank are 100% of the first 6% of compensation that an employee contributes to the 401(k) Plan.
Matching contributions made by the Bank	100.00%
Matching contributions made by employees	$ 189,000	$ 174,000
Discretionary contributions made	77,000	$ 72,000
ESOP borrowed to purchase shares	$ 700,000
Number of shares purchased \| shares	69,972
Employee stock ownership plan debt structure description	The loan is being repaid in twenty equal annual installments through 2026. The loan bears interest at the prime rate.
Total shares released to participants \| shares	3,498	3,498
Expense related to ESOP	$ 44,000	$ 35,000
Number of unearned ESOP shares	34,986
Aggregate market value of unearned ESOP shares.	$ 496,801
Supplemental executive retirement plan (SERP)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Number of executive under supplemental executive retirement plan (SERP) \| Executive	2
Contribution recorded under supplemental executive retirement plan (SERP)	$ 759,000	621,000
Total expense under the SERP	$ 138,000	$ 125,000

Represents information related to number of executives under supplemental executive retirement plan (SERP).

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Amount of plan administration expenses deducted from total plan assets.

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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.

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- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

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Percentage employer matches of the employee's percentage contribution matched.

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Maximum amount the employee may contribute to a defined contribution plan.

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- Definition

Description of the terms and benefits provided by the employer's defined contribution plans. A defined contribution plan provides benefits in return for services rendered, provides an individual account for each participant, and has terms that specify how contributions to the individual's account are to be determined rather than the amount of benefits the individual is to receive. Under a defined contribution pension plan, the benefits a participant will receive depend solely on the amount contributed to the participant's account, the returns earned on investments of those contributions, and forfeitures of other participants' benefits that may be allocated to such participant's account. A description of the plan(s) including employee groups covered, the basis for determining contributions, and the nature and effects of significant matters affecting comparability of information for all periods presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
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This item represents the amount of cash contributions during the period made by the entity to the Employee Stock Ownership Plan (ESOP).

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

The amount of plan compensation cost recognized during the period.

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-SubTopic 40
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- Definition

Sets forth the terms of the arrangement, including interest rate and repayment requirements, in which the employer lends funds to the ESOP. The loan amount is not required to be externally reported.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Represents the carrying amount of shares held by the ESOP as of the balance sheet date in which no ESOP participant has a vested interest and no lender has a claim.

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Fair value of unearned shares held by the employee stock ownership plan (ESOP).

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- Definition

The shares that, although not legally released, will be released by a future scheduled and committed debt service payment and will be allocated to employees for service rendered in the current accounting period. The ESOP documents typically define the period of service to which the shares relate. ESOP shares are released to compensate employees directly, to settle employer liabilities for other employee benefits, and to replace dividends on allocated shares that are used for debt service.

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- Definition

Sum of the allocated, committed-to-be-released and suspense shares of the entity held by the plan.

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- Definition

For a classified balance sheet, the amount recognized in balance sheet as a current liability associated with an underfunded defined benefit plan.

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