Fair Value of Financial Instruments and Fair Value Measurement - Estimated Fair Value of On-Balance Sheet Financial Instruments (Details) (USD $)	Mar. 31, 2015	Sep. 30, 2014	Mar. 31, 2014	Sep. 30, 2013
Financial assets:
Cash and cash equivalents - carrying value	$ 64,563,841	$ 99,462,953	$ 175,113,764	$ 161,452,481
Cash and cash equivalents - fair value	64,563,841	99,462,953
Investment securities available for sale	182,981,526us-gaap_AvailableForSaleSecurities	188,743,273us-gaap_AvailableForSaleSecurities
FHLB stock - carrying value	3,005,600us-gaap_FederalHomeLoanBankStock	3,442,900us-gaap_FederalHomeLoanBankStock
FHLB stock - fair value	3,005,600	3,442,900
Loans receivable, net - carrying value	656,212,122	606,366,713
Loans receivable, net - fair value	654,262,331	607,754,670
Loans held for sale - carrying value	2,700,613us-gaap_LoansReceivableHeldForSaleNet	2,054,722us-gaap_LoansReceivableHeldForSaleNet
Loans held for sale - fair value	2,755,616	2,090,469
FDIC receivable for loss sharing arrangements - carrying value	6,749,359us-gaap_FDICIndemnificationAsset	10,531,809us-gaap_FDICIndemnificationAsset		29,941,862us-gaap_FDICIndemnificationAsset
FDIC receivable for loss sharing arrangements - fair value	5,932,365	7,658,896
Assets held for sale	1,744,584	1,744,584
Accrued interest and dividends receivable - carrying value	2,594,483	2,459,347
Accrued interest and dividends receivable - fair value	2,594,483us-gaap_ReceivablesFairValueDisclosure	2,459,347us-gaap_ReceivablesFairValueDisclosure
Financial liabilities:
Deposits - carrying value	736,802,784us-gaap_Deposits	717,192,200us-gaap_Deposits
Deposits - fair value	737,511,630us-gaap_DepositsFairValueDisclosure	718,935,248us-gaap_DepositsFairValueDisclosure
FHLB advances - carrying value	50,000,000	55,000,000
FHLB advances - fair value	54,061,552	59,391,540
Accrued interest payable - carrying value	198,293	182,198
Accrued interest payable - fair value	198,293	182,198
Fair Value, Inputs, Level 1
Financial assets:
Cash and cash equivalents - fair value	64,563,841	99,462,953
Investment securities available for sale	0	0
FHLB stock - fair value	0	0
Loans receivable, net - fair value	0	0
Loans held for sale - fair value	0	0
FDIC receivable for loss sharing arrangements - fair value	0	0
Assets held for sale	0	0
Accrued interest and dividends receivable - fair value	0	0
Financial liabilities:
Deposits - fair value	0	0
FHLB advances - fair value	0	0
Accrued interest payable - fair value	0	0
Fair Value, Inputs, Level 2
Financial assets:
Cash and cash equivalents - fair value	0	0
Investment securities available for sale	182,981,526	188,743,273
FHLB stock - fair value	3,005,600	3,442,900
Loans receivable, net - fair value	0	0
Loans held for sale - fair value	2,755,616	2,090,469
FDIC receivable for loss sharing arrangements - fair value	0	0
Assets held for sale	0	0
Accrued interest and dividends receivable - fair value	495,737	538,043
Financial liabilities:
Deposits - fair value	737,511,630	718,935,248
FHLB advances - fair value	54,061,552	59,391,540
Accrued interest payable - fair value	198,293	182,198
Fair Value, Inputs, Level 3
Financial assets:
Cash and cash equivalents - fair value	0	0
Investment securities available for sale	0	0
FHLB stock - fair value	0	0
Loans receivable, net - fair value	654,262,331	607,754,670
Loans held for sale - fair value	0	0
FDIC receivable for loss sharing arrangements - fair value	5,932,365	7,658,896
Assets held for sale	1,744,584	1,744,584
Accrued interest and dividends receivable - fair value	2,098,746	1,921,304
Financial liabilities:
Deposits - fair value	0	0
FHLB advances - fair value	0	0
Accrued interest payable - fair value	$ 0	$ 0

-- None. No documentation exists for this element. --

No definition available.

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Interest, dividends, rents, ancillary and other revenues earned but not yet received by the entity on its investments.

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Fair value portion of accrued expenses.

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Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages.

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Fair value portion of assets classified as held for sale.

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others.

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Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits.

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Carrying amount of receivable assets originating from the indemnification agreement with the Federal Deposit Insurance Corporation (FDIC), in which the FDIC is to partially cover losses.

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Fair value portion of borrowing from Federal Home Loan Bank (FHLBank).

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Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity).

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Amount of interest payable on debt, including, but not limited to, trade payables.

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Fair value portion of investments in Federal Home Loan Bank (FHLBank) stock.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

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Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

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Amount classified as loans attributable to disposal group held for sale or disposed of. Excludes loans and leases covered under loss sharing agreements and loans classified as debt securities.

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Fair value portion of receivables, including, but not limited to, trade account receivables, note receivables, and loan receivables.

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