Fair Value Measurements and Fair Value of Financial Instruments - Carrying Amount and Estimated Fair Value (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Jun. 30, 2014	Sep. 30, 2013	Jun. 30, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, Carrying Amount	$ 19,735	$ 13,809	$ 14,831	$ 6,222
Long term certificate of deposit, Carrying Amount	250	250
Securities available for sale, Carrying Amount	65,315	56,151
Securities held to maturity, Carrying Amount	184,235	181,946
Federal Home Loan Bank stock, Carrying Amount	1,444	1,561
Net loans, Carrying Amount	406,694	399,309
Accrued interest receivable, Carrying Amount	2,918	2,710
Deposits, Carrying Amount	611,308	589,574
Federal Home Loan Bank borrowings, Carrying Amount	19,300	17,650
Accrued Interest Payable, Carrying Amount	56	66
Cash and cash equivalents	19,735	13,809
Long term certificate of deposit	250	250
Securities available for sale, at fair value	65,315	56,151
Securities held-to-maturity, fair value	184,608	181,932
Federal Home Loan Bank stock	1,444	1,561
Net loans	415,237	406,718
Accrued interest receivable	2,918	2,710
Deposits	611,448	589,681
Federal Home Loan Bank borrowings	19,145	17,465
Accrued interest payable	56	66
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, Carrying Amount	5,051	5,343
Cash and cash equivalents	19,735	13,809
Long term certificate of deposit	250	250
Securities available for sale, at fair value	5,051	5,343
Securities held-to-maturity, fair value	0	0
Federal Home Loan Bank stock	0	0
Net loans	0	0
Accrued interest receivable	0	0
Deposits	0	0
Federal Home Loan Bank borrowings	0	0
Accrued interest payable	0	0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, Carrying Amount	60,264	50,808
Cash and cash equivalents	0	0
Long term certificate of deposit	0	0
Securities available for sale, at fair value	60,264	50,808
Securities held-to-maturity, fair value	184,608	181,932
Federal Home Loan Bank stock	1,444	1,561
Net loans	0	0
Accrued interest receivable	2,918	2,710
Deposits	611,448	589,681
Federal Home Loan Bank borrowings	19,145	17,465
Accrued interest payable	56	66
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, Carrying Amount	0	0
Cash and cash equivalents	0	0
Long term certificate of deposit	0	0
Securities available for sale, at fair value	0	0
Securities held-to-maturity, fair value	0	0
Federal Home Loan Bank stock	0	0
Net loans	415,237	406,718
Accrued interest receivable	0	0
Deposits	0	0
Federal Home Loan Bank borrowings	0	0
Accrued interest payable	$ 0	$ 0