Fair Value - Carrying Amounts and Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Financial Assets:
Cash and cash equivalents	$ 35,690	$ 67,839
Securities available-for-sale, at fair value	15,453	14,140
Loans receivable held for investment	351,119	306,643
Accrued interest receivable	1,140	1,077
Federal Home Loan Bank stock	2,573	2,573
Financial Liabilities:
Deposits	276,650	265,495
Federal Home Loan Bank advances	71,629	73,441
Junior subordinated debentures	4,370	3,117
Accrued interest payable	56	52
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial Assets:
Cash and cash equivalents	35,690	67,839
Securities available-for-sale, at fair value	2,024	1,973
Accrued interest receivable	63	63
Federal Home Loan Bank stock	2,573	2,573
Significant Other Observable Unobservable Inputs (Level 2)
Financial Assets:
Securities available-for-sale, at fair value	13,429	12,167
Accrued interest receivable	34	31
Financial Liabilities:
Deposits	276,650	265,495
Federal Home Loan Bank advances	71,629	73,441
Accrued interest payable	50	46
Significant Unobservable Inputs (Level 3)
Financial Assets:
Loans receivable held for investment	351,119	306,643
Accrued interest receivable	1,043	983
Financial Liabilities:
Junior subordinated debentures	4,370	3,117
Accrued interest payable	6	6
Carrying Value
Financial Assets:
Cash and cash equivalents	35,690	67,839
Securities available-for-sale, at fair value	15,453	14,140
Loans receivable held for investment	341,264	304,171
Accrued interest receivable	1,140	1,077
Federal Home Loan Bank stock	2,573	2,573
Financial Liabilities:
Deposits	279,772	272,614
Federal Home Loan Bank advances	70,000	72,000
Junior subordinated debentures	5,100	5,100
Accrued interest payable	$ 56	$ 52