CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net income	$ 1,479	$ 735
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	98us-gaap_ProvisionForLoanAndLeaseLosses	708us-gaap_ProvisionForLoanAndLeaseLosses
Amortization of securities, net	128	119
Net change in deferred loan fees and costs	61	130
Depreciation and amortization expense	343us-gaap_DepreciationAndAmortization	285us-gaap_DepreciationAndAmortization
Increase in accrued interest receivable	(23)	(112)
Income from bank-owned life insurance	(101)us-gaap_BankOwnedLifeInsuranceIncome	(101)us-gaap_BankOwnedLifeInsuranceIncome
Stock-based compensation expense	293us-gaap_ShareBasedCompensation	272us-gaap_ShareBasedCompensation
Excess tax benefit on share-based compensation	(22)	(20)
Gain on sale of loans	(210)us-gaap_GainLossOnSaleOfMortgageLoans	(453)us-gaap_GainLossOnSaleOfMortgageLoans
Loans originated for sale	(20,629)	(39,016)
Proceeds from sales of loans	20,850	41,074
Gain on sale of other real estate owned	(8)	(18)
Write down of other real estate owned		25
Decrease in prepaid FDIC insurance		215
Net change in other assets and liabilities	(778)	(561)
Net cash provided by operating activities	1,481	3,282
Activity in securities available for sale:
Maturities, prepayments and calls	2,013	2,712
Purchases	(2,558)	(13,820)
Maturities, prepayments and calls of securities held to maturity	214	547
Purchase of Federal Home Loan Bank stock		(278)
Redemption of Federal Home Loan Bank stock		232
Loan originations, net	(7,166)	(44,395)
Principal balance of loans purchased	(374)
Proceeds from sale of other real estate owned	8	440
Purchase of premises and equipment	(493)	(201)
Net cash used by investing activities	(8,356)	(54,763)
Cash flows from financing activities:
Net change in deposits	6,393us-gaap_IncreaseDecreaseInDeposits	21,522us-gaap_IncreaseDecreaseInDeposits
Net change in Federal Home Loan Bank advances with maturities of three months or less	(2,825)	32,825
Proceeds from Federal Home Loan Bank advances with maturities greater than three months	5,500	6,000
Repayments of Federal Home Loan Bank advances with maturities greater than three months	(3,000)	(7,500)
Net change in mortgagors' escrow accounts	(36)	196
Repurchase of common stock	(288)	(1,771)
Cash dividends paid on common stock	(274)us-gaap_PaymentsOfDividendsCommonStock	(305)us-gaap_PaymentsOfDividendsCommonStock
Exercise of stock options	6
Excess tax benefit on share-based compensation	22	20
Net cash provided by financing activities	5,498	50,987
Net change in cash and cash equivalents	(1,377)	(494)
Cash and cash equivalents at beginning of period	6,295	6,789
Cash and cash equivalents at end of period	4,918	6,295
Supplementary information:
Interest paid on deposit accounts	836gtwn_InterestPaidOnDepositAccounts	586gtwn_InterestPaidOnDepositAccounts
Interest Paid on Borrowings	606gtwn_InterestPaidOnBorrowings	601gtwn_InterestPaidOnBorrowings
Income taxes paid	838us-gaap_IncomeTaxesPaid	863us-gaap_IncomeTaxesPaid
Loans transferred to other real estate owned		$ 244us-gaap_TransferToOtherRealEstate

Interest paid on borrowings.

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Interest paid on deposit accounts.

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Represents the net gain (loss) resulting from sales and other disposals of other real estate owned.

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No definition available.

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This element represents the increase/(decrease) in accumulated prepayments received by financial institutions from borrowers for taxes (for example, property taxes) and insurance (for example, property and catastrophe) which will periodically be remitted to the appropriate tax authority or insurer (or insurance agency) on behalf of the borrower.

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The sum of the periodic adjustments of the differences between securities' face values and purchase prices that are charged against earnings. This is called accretion if the security was purchased at a discount and amortization if it was purchased at premium. As a noncash item, this element is an adjustment to net income when calculating cash provided by or used in operations using the indirect method.

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The net increase(decrease) in interest income during the period representing the allocation of deferred loan origination fees less deferred loan origination costs using the effective interest method over the term of the debt arrangement to which they pertain taking into account the effect of prepayments.

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Earnings on or other increases in the value of the cash surrender value of bank owned life insurance policies.

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Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable.

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The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

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Amount of cash inflow from realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes.

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Amount of cash outflow for realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes.

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The gains (losses) included in earnings that represent the difference between the sale price and the carrying value of loans made to finance real estate acquisitions. This element refers to the gain (loss) and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

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The net gain (loss) resulting from sales and other disposals of other real estate owned, increases (decreases) in the valuation allowance for foreclosed real estate, and write-downs of other real estate owned after acquisition or physical possession.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.

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The increase (decrease) during the reporting period in the amount due from borrowers for interest payments.

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The net cash inflow or outflow for the increase (decrease) in the beginning and end of period deposits balances.

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The increase (decrease) during the reporting period in other assets used in operating activities less other operating liabilities used in operating activities not separately disclosed in the statement of cash flows. May include changes in other current assets and liabilities, other noncurrent assets and liabilities, or a combination of other current and noncurrent assets and liabilities.

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The increase (decrease) during the reporting period in the amount of outstanding money paid in advance for goods or services that bring economic benefits for future periods.

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The increase (decrease) in cash associated with the entity's continuing operating, investing, and financing activities. While for technical reasons this element has no balance attribute, the default assumption is a debit balance consistent with its label.

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No definition available.

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Amount of cash inflow (outflow) of financing activities, excluding discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.

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Amount of cash inflow (outflow) of investing activities, excluding discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.

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Amount of cash inflow (outflow) from operating activities, excluding discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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The net cash outflow or inflow for the increase (decrease) in the beginning and end of period of loan and lease balances which are not originated or purchased specifically for resale. Includes cash payments and proceeds associated with (a) loans held-for-investment, (b) leases held-for-investment, and (c) both.

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The cash outflow to reacquire common stock during the period.

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Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.

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The cash outflow to acquire debt and equity securities not classified as either held-to-maturity securities or trading securities which would be classified as available-for-sale securities and reported at fair value, with unrealized gains and losses excluded from earnings and reported in a separate component of shareholders' equity.

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Amount of cash outflow to acquire Federal Home Loan Bank (FHLB) stock.

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The cash outflow associated with purchasing loans held for investment purposes during the period.

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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The cash outflow used to purchase loans that are secured with real estate mortgage and are held with the intention to resell in the near future.

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The cash inflow associated with maturities (principal being due), prepayments and calls (requests of early payments) on securities not classified as either held-to-maturity securities or trading securities which are classified as available-for-sale securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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The cash inflow associated with the maturity, prepayments and calls (requests for early payments) of debt securities designated as held-to-maturity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

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-Publisher FASB

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The cash inflow from a borrowing net of the cash outflow from repayment of a borrowing having initial term of repayment within three months.

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-Publisher FASB

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-Publisher FASB

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- Definition

Amount of cash inflow from sale of Federal Home Loan Bank (FHLB) stock.

+ References

No definition available.

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The cash inflow from the sale assets received in full or partial satisfaction of a receivable including real and personal property; equity interests in corporations, partnerships, and joint ventures; and beneficial interests in trusts. Foreclosed assets also include loans that are treated as if the underlying collateral had been foreclosed because the institution has taken possession of the collateral, even though legal foreclosure or repossession proceedings have not taken place.

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The cash inflow from sales of loans that are secured with real estate mortgages and are held with the intention to resell in the near future.

+ References

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- Definition

The cash inflow from a borrowing having initial term of repayment of more than three months but less than one year or one operating cycle (if the normal cycle is more than one year).

+ References

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- Definition

The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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-Publisher FASB

-Name Accounting Standards Codification

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-Paragraph 2

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Amount of expense related to estimated loss from loan and lease transactions.

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The cash outflow from a repayment of a borrowing having initial term of repayment of more than three months but less than one year or one operating cycle (if the normal cycle is more than one year).

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

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- Definition

Value transferred from mortgage loans to real estate owned (REO) in noncash transactions.

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-Publisher FASB

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-Topic 230

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