Fair Value of Financial Instruments and Fair Value Measurement - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) (USD $)	Mar. 31, 2015	Sep. 30, 2014
Assets:
Investment securities available for sale	$ 182,981,526	$ 188,743,273
Assets held for sale	1,744,584	1,744,584
Other investment securities: tax-free municipals
Assets:
Investment securities available for sale		13,457,203
Other investment securities: collateralized loan obligations
Assets:
Investment securities available for sale	24,329,386
Mortgage-backed securities: FHLMC certificates
Assets:
Investment securities available for sale	40,546,762	44,025,928
Mortgage-backed securities: FNMA certificates
Assets:
Investment securities available for sale	105,984,755	118,278,377
Mortgage-backed securities: GNMA certificates
Assets:
Investment securities available for sale	1,646,637	1,697,844
Collateralized mortgage obligations: FHLMC
Assets:
Investment securities available for sale	44,890	53,496
Collateralized mortgage obligations: FNMA
Assets:
Investment securities available for sale	71,917	80,156
Private-label mortgage securities: investment grade
Assets:
Investment securities available for sale	1,167,623	1,446,858
Private-label mortgage securities: split rating
Assets:
Investment securities available for sale	1,031,106	1,094,107
Private-label mortgage securities: non-investment grade
Assets:
Investment securities available for sale	8,158,450	8,609,304
Total investment securities available for sale
Assets:
Investment securities available for sale	182,981,526	188,743,273
Total recurring assets at fair value
Assets:
Total recurring assets at fair value	184,726,110	190,487,857
Fair Value, Inputs, Level 1
Assets:
Investment securities available for sale	0	0
Assets held for sale	0	0
Fair Value, Inputs, Level 1 | Other investment securities: tax-free municipals
Assets:
Investment securities available for sale		0
Fair Value, Inputs, Level 1 | Other investment securities: collateralized loan obligations
Assets:
Investment securities available for sale	0
Fair Value, Inputs, Level 1 | Mortgage-backed securities: FHLMC certificates
Assets:
Investment securities available for sale	0	0
Fair Value, Inputs, Level 1 | Mortgage-backed securities: FNMA certificates
Assets:
Investment securities available for sale	0	0
Fair Value, Inputs, Level 1 | Mortgage-backed securities: GNMA certificates
Assets:
Investment securities available for sale	0	0
Fair Value, Inputs, Level 1 | Collateralized mortgage obligations: FHLMC
Assets:
Investment securities available for sale	0	0
Fair Value, Inputs, Level 1 | Collateralized mortgage obligations: FNMA
Assets:
Investment securities available for sale	0	0
Fair Value, Inputs, Level 1 | Private-label mortgage securities: investment grade
Assets:
Investment securities available for sale	0	0
Fair Value, Inputs, Level 1 | Private-label mortgage securities: split rating
Assets:
Investment securities available for sale	0	0
Fair Value, Inputs, Level 1 | Private-label mortgage securities: non-investment grade
Assets:
Investment securities available for sale	0	0
Fair Value, Inputs, Level 1 | Total investment securities available for sale
Assets:
Investment securities available for sale	0	0
Fair Value, Inputs, Level 1 | Total recurring assets at fair value
Assets:
Total recurring assets at fair value	0	0
Fair Value, Inputs, Level 2
Assets:
Investment securities available for sale	182,981,526	188,743,273
Assets held for sale	0	0
Fair Value, Inputs, Level 2 | Other investment securities: tax-free municipals
Assets:
Investment securities available for sale		13,457,203
Fair Value, Inputs, Level 2 | Other investment securities: collateralized loan obligations
Assets:
Investment securities available for sale	24,329,386
Fair Value, Inputs, Level 2 | Mortgage-backed securities: FHLMC certificates
Assets:
Investment securities available for sale	40,546,762	44,025,928
Fair Value, Inputs, Level 2 | Mortgage-backed securities: FNMA certificates
Assets:
Investment securities available for sale	105,984,755	118,278,377
Fair Value, Inputs, Level 2 | Mortgage-backed securities: GNMA certificates
Assets:
Investment securities available for sale	1,646,637	1,697,844
Fair Value, Inputs, Level 2 | Collateralized mortgage obligations: FHLMC
Assets:
Investment securities available for sale	44,890	53,496
Fair Value, Inputs, Level 2 | Collateralized mortgage obligations: FNMA
Assets:
Investment securities available for sale	71,917	80,156
Fair Value, Inputs, Level 2 | Private-label mortgage securities: investment grade
Assets:
Investment securities available for sale	1,167,623	1,446,858
Fair Value, Inputs, Level 2 | Private-label mortgage securities: split rating
Assets:
Investment securities available for sale	1,031,106	1,094,107
Fair Value, Inputs, Level 2 | Private-label mortgage securities: non-investment grade
Assets:
Investment securities available for sale	8,158,450	8,609,304
Fair Value, Inputs, Level 2 | Total investment securities available for sale
Assets:
Investment securities available for sale	182,981,526	188,743,273
Fair Value, Inputs, Level 2 | Total recurring assets at fair value
Assets:
Total recurring assets at fair value	182,981,526	188,743,273
Fair Value, Inputs, Level 3
Assets:
Investment securities available for sale	0	0
Assets held for sale	1,744,584	1,744,584
Fair Value, Inputs, Level 3 | Other investment securities: tax-free municipals
Assets:
Investment securities available for sale		0
Fair Value, Inputs, Level 3 | Other investment securities: collateralized loan obligations
Assets:
Investment securities available for sale	0
Fair Value, Inputs, Level 3 | Mortgage-backed securities: FHLMC certificates
Assets:
Investment securities available for sale	0	0
Fair Value, Inputs, Level 3 | Mortgage-backed securities: FNMA certificates
Assets:
Investment securities available for sale	0	0
Fair Value, Inputs, Level 3 | Mortgage-backed securities: GNMA certificates
Assets:
Investment securities available for sale	0	0
Fair Value, Inputs, Level 3 | Collateralized mortgage obligations: FHLMC
Assets:
Investment securities available for sale	0	0
Fair Value, Inputs, Level 3 | Collateralized mortgage obligations: FNMA
Assets:
Investment securities available for sale	0	0
Fair Value, Inputs, Level 3 | Private-label mortgage securities: investment grade
Assets:
Investment securities available for sale	0	0
Fair Value, Inputs, Level 3 | Private-label mortgage securities: split rating
Assets:
Investment securities available for sale	0	0
Fair Value, Inputs, Level 3 | Private-label mortgage securities: non-investment grade
Assets:
Investment securities available for sale	0	0
Fair Value, Inputs, Level 3 | Total investment securities available for sale
Assets:
Investment securities available for sale	0	0
Fair Value, Inputs, Level 3 | Total recurring assets at fair value
Assets:
Total recurring assets at fair value	$ 1,744,584	$ 1,744,584