Fair Value Measurements and Fair Value of Financial Instruments - Carrying Amount and Estimated Fair Value (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents, Carrying Amount	$ 14,869	$ 13,809	$ 11,676	$ 6,222
Long term certificate of deposit, Carrying Amount	250	250
Securities available for sale, Carrying Amount	69,071	56,151
Securities held to maturity, Carrying Amount	181,065	181,946
Federal Home Loan Bank stock, Carrying Amount	3,230	1,561
Net loans, Carrying Amount	422,716	399,309
Accrued interest receivable, Carrying Amount	2,937	2,710
Deposits, Carrying Amount	583,181	589,574
Federal Home Loan Bank borrowings, Carrying Amount	59,000	17,650
Accrued Interest Payable, Carrying Amount	60	66
Cash and cash equivalents, Fair Value	14,869	13,809
Long term certificate of deposit, Fair Value	250	250
Securities available for sale, at fair value	69,071	56,151
Securities held-to-maturity, Fair Value	181,981	181,932
Federal Home Loan Bank stock, Fair Value	3,230	1,561
Net loans, Fair Value	432,338	406,718
Accrued interest receivable, Fair Value	2,937	2,710
Deposits, Fair Value	583,338	589,681
Federal Home Loan Bank borrowings, Fair Value	58,861	17,465
Accrued interest payable, Fair Value	60	66
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, Carrying Amount	5,036	5,343
Cash and cash equivalents, Fair Value	14,869	13,809
Long term certificate of deposit, Fair Value	250	250
Securities available for sale, at fair value	5,036	5,343
Securities held-to-maturity, Fair Value	0	0
Federal Home Loan Bank stock, Fair Value	0	0
Net loans, Fair Value	0	0
Accrued interest receivable, Fair Value	0	0
Deposits, Fair Value	0	0
Federal Home Loan Bank borrowings, Fair Value	0	0
Accrued interest payable, Fair Value	0	0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale, Carrying Amount	64,035	50,808
Cash and cash equivalents, Fair Value	0	0
Long term certificate of deposit, Fair Value	0	0
Securities available for sale, at fair value	64,035	50,808
Securities held-to-maturity, Fair Value	181,981	181,932
Federal Home Loan Bank stock, Fair Value	3,230	1,561
Net loans, Fair Value	0	0
Accrued interest receivable, Fair Value	2,937	2,710
Deposits, Fair Value	583,338	589,681
Federal Home Loan Bank borrowings, Fair Value	58,861	17,465
Accrued interest payable, Fair Value	60	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, Fair Value	0	0
Long term certificate of deposit, Fair Value	0	0
Securities available for sale, at fair value	0	0
Securities held-to-maturity, Fair Value	0	0
Federal Home Loan Bank stock, Fair Value	0	0
Net loans, Fair Value	432,338	406,718
Accrued interest receivable, Fair Value	0	0
Deposits, Fair Value	0	0
Federal Home Loan Bank borrowings, Fair Value	0	0
Accrued interest payable, Fair Value	$ 0	$ 0