Fair Value Measurements and Fair Value of Financial Instruments - Carrying Amount and Estimated Fair Value (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Sep. 30, 2012	Jun. 30, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, Carrying Amount	$ 14,831	$ 6,222	$ 22,919	$ 7,742
Long term certificate of deposit, Carrying Amount	250	250
Securities available for sale, Carrying Amount	66,118	69,644
Securities held to maturity, at amortized cost	173,848	176,519
Federal Home Loan Bank stock, Carrying Amount	1,113	1,388
Net loans, Carrying Amount	374,138	359,426
Accrued interest receivable, Carrying Amount	2,870	2,663
Deposits, Carrying Amount	580,482	558,439
Federal Home Loan Bank borrowings, Carrying Amount	8,500	14,600
Accrued Interest Payable, Carrying Amount	52	55
Cash and cash equivalents	14,831	6,222
Long term certificate of deposit	250	250
Securities available for sale, at fair value	66,118	69,644
Securities held-to-maturity, fair value	173,353	177,660
Federal Home Loan Bank stock	1,113	1,388
Net loans	381,942	367,377
Accrued interest receivable	2,870	2,663
Deposits	580,521	558,517
Federal Home Loan Bank borrowings	8,244	14,378
Accrued interest payable	52	55
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, Carrying Amount	5,342	5,345
Cash and cash equivalents	14,831	6,222
Long term certificate of deposit	250	250
Securities available for sale, at fair value	5,342	5,345
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	60,776	64,299
Cash and cash equivalents	0	0
Long term certificate of deposit	0	0
Securities available for sale, at fair value	60,776	64,299
Securities held-to-maturity, fair value	173,353	177,660
Federal Home Loan Bank stock	1,113	1,388
Net loans	0	0
Accrued interest receivable	2,870	2,663
Deposits	580,521	558,517
Federal Home Loan Bank borrowings	8,244	14,378
Accrued interest payable	52	55
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	381,942	367,377
Accrued interest receivable	0	0
Deposits	0	0
Federal Home Loan Bank borrowings	0	0
Accrued interest payable	$ 0	$ 0